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Document and Entity Information	6 Months Ended
Document and Entity Information	Jun. 30, 2013 shares
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	cmcsa
Entity Registrant Name	COMCAST CORP
Entity Central Index Key	0001166691
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding	2,133,605,012
ClassA Special Common Stock [Member]
Entity Common Stock, Shares Outstanding	481,862,157
Class B Common Stock [Member]
Entity Common Stock, Shares Outstanding	9,444,375

Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 1,389	$ 10,951
Investments [Current]	3,765	1,464
Receivables, net	5,507	5,521
Programming rights	859	909
Other current assets	1,215	1,146
Total current assets	12,735	19,991
Film and television costs	4,340	5,054
Investments	5,299	6,325
Property and equipment, net	28,255	27,232
Franchise rights	59,364	59,364
Goodwill	27,075	26,985
Other intangible assets, net	17,440	17,840
Other noncurrent assets, net	2,311	2,180
Total assets	156,819	164,971
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	6,077	6,206
Accrued participations and residuals	1,625	1,350
Deferred revenue	946	851
Accrued expenses and other current liabilities	7,419	5,931
Current portion of long-term debt	2,535	2,376
Total current liabilities	18,602	16,714
Long-term debt, less current portion	44,114	38,082
Deferred income taxes	31,303	30,110
Other noncurrent liabilities	12,461	13,271
Commitments and contingencies (Note 13)
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	853	16,998
Equity:
Preferred stock - authorized, 20,000,000 shares; issued, zero	0	0
Common stock	31	31
Additional paid-in capital	38,991	40,547
Retained earnings	17,509	16,280
Treasury stock, 365,460,750 Class A common shares and 70,934,764 Class A Special common shares	(7,517)	(7,517)
Accumulated other comprehensive income (loss)	77	15
Total Comcast Corporation shareholders' equity	49,091	49,356
Noncontrolling interests	395	440
Total equity	49,486	49,796
Total liabilities and equity	156,819	164,971
Class A Common Stock [Member]
Equity:
Common stock	25	25
Class B Common Stock [Member]
Equity:
Common stock	0	0
ClassA Special Common Stock [Member]
Equity:
Common stock	$ 6	$ 6

Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Preferred stock, authorized	20,000,000	20,000,000
Preferred stock, issued	0	0
Accumulated depreciation	$ 41,089	$ 39,425
Accumulated amortization	$ 8,273	$ 7,662
Class A Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	7,500,000,000	7,500,000,000
Common stock, issued	2,499,065,762	2,487,739,385
Common stock, outstanding	2,133,605,012	2,122,278,635
Treasury stock common shares	365,460,750	365,460,750
ClassA Special Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	7,500,000,000	7,500,000,000
Common stock, issued	552,796,921	578,704,227
Common stock, outstanding	481,862,157	507,769,463
Treasury stock common shares	70,934,764	70,934,764
Class B Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	75,000,000	75,000,000
Common stock, issued	9,444,375	9,444,375
Common stock, outstanding	9,444,375	9,444,375

Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statement of Income
Revenue	$ 16,270	$ 15,211	$ 31,580	$ 30,089
Costs and Expenses:
Programming and production	4,968	4,551	9,631	9,287
Other operating and administrative	4,570	4,365	9,036	8,610
Advertising, marketing and promotion	1,307	1,291	2,454	2,500
Depreciation	1,583	1,516	3,149	3,045
Amortization	407	409	808	810
Total costs and expenses	12,835	12,132	25,078	24,252
Operating income	3,435	3,079	6,502	5,837
Other Income (Expense):
Interest expense	(636)	(625)	(1,289)	(1,265)
Investment income (loss), net	13	8	85	100
Equity in net income (losses) of investees, net	23	29	34	32
Other income (expense), net	(43)	(47)	30	(63)
Nonoperating income (expense)	(643)	(635)	(1,140)	(1,196)
Income before income taxes	2,792	2,444	5,362	4,641
Income tax expense	(1,048)	(811)	(1,973)	(1,561)
Net income	1,744	1,633	3,389	3,080
Net (income) loss attributable to noncontrolling interests	(10)	(285)	(218)	(508)
Net income attributable to Comcast Corporation	$ 1,734	$ 1,348	$ 3,171	$ 2,572
Basic earnings per common share attributable to Comcast Corporation shareholders	$ 0.66	$ 0.50	$ 1.20	$ 0.95
Diluted earnings per common share attributable to Comcast Corporation shareholders	0.65	0.50	1.19	0.94
Dividends declared per common share attributable to Comcast Corporation shareholders	$ 0.195	$ 0.1625	$ 0.39	$ 0.325

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statement of Comprehensive Income
Net income	$ 1,744	$ 1,633	$ 3,389	$ 3,080
Unrealized gains (losses) on marketable securities, net of deferred taxes	97	0	117	0
Deferred gains (losses) on cash flow hedges, net of deferred taxes	1	(35)	(35)	(15)
Amounts reclassified to net income:
Realized (gains) losses on marketable securities, net of deferred taxes	0	0	(23)	0
Realized (gains) losses on cash flow hedges, net of deferred taxes	2	17	48	1
Employee benefit obligations, deferred taxes	2	(3)	3	(5)
Currency translation adjustments, net of deferred taxes	(14)	(9)	(31)	(7)
Comprehensive income	1,832	1,603	3,468	3,054
Net (income) loss attributable to noncontrolling interests	(10)	(285)	(218)	(508)
Other comprehensive (income) loss attributable to noncontrolling interests	0	8	9	8
Comprehensive income attributable to Comcast Corporation	$ 1,822	$ 1,326	$ 3,259	$ 2,554

Condensed Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Unrealized gains (losses) on marketable securities, deferred taxes	$ (59)	$ 0	$ (71)	$ 0
Deferred gains (losses) on cash flow hedges, deferred taxes	(1)	20	20	9
Realized (gains) losses on marketable securities, deferred taxes	0	0	12	0
Realized (gains) losses on cash flow hedges, deferred taxes	(1)	(10)	(28)	(1)
Employee benefit obligations, deferred taxes	(1)	1	(2)	1
Currency translation adjustments, deferred taxes	$ 9	$ 2	$ 14	$ 2

- Definition

Amount of tax effect, net of reclassification adjustments, on the result from the process of expressing in the reporting currency of the reporting entity those amounts that are denominated or measured in a different currency, attributable to the parent entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Tax effect of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

+ References + Details

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net cash provided by (used in) operating activities	$ 7,685	$ 7,815
Investing Activities
Capital expenditures	(2,867)	(2,461)
Cash paid for intangible assets	(444)	(414)
Acquisition of 30 Rockefeller Plaza properties	(1,311)
Proceeds from sales of businesses and investments	91	64
Return of capital from investees	146	7
Purchases of investments	(641)	(108)
Other	66	83
Net cash provided by (used in) investing activities	(4,960)	(2,829)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net	348	(554)
Proceeds from borrowings	2,933
Repurchases and repayments of debt	(2,195)	(1,692)
Repurchases and retirements of common stock	(1,000)	(1,500)
Dividends paid	(942)	(741)
Issuances of common stock	24	184
Purchase of NBCUniversal noncontrolling common equity interest	(10,761)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock	(116)	(233)
Settlement of Station Venture liability	(602)
Other	24	31
Net cash provided by (used in) financing activities	(12,287)	(4,505)
Increase (decrease) in cash and cash equivalents	(9,562)	481
Cash and cash equivalents, beginning of period	10,951	1,620
Cash and cash equivalents, end of period	$ 1,389	$ 2,101

Condensed Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Redeemable Noncontrolling Interests And Redeemable Subisdiary Preferred Stock [Member]	Class A Common Stock [Member]	ClassA Special Common Stock [Member]	Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock at Cost [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2011	$ 47,655	$ 16,014	$ 25	$ 7	$ 0	$ 40,940	$ 13,971	$ (7,517)	$ (152)	$ 381
Stock compensation plans	234					361	(127)
Repurchase and retirements of common stock	(1,500)			(1)		(583)	(916)
Employee stock purchase plans	41					41
Dividends declared	(874)						(874)
Other comprehensive income (loss)	(18)	(8)							(18)
Contributions from (distributions to) noncontrolling interests, net	(85)	(132)								(85)
Other	95	(44)				2				93
Net income (loss)	2,631	449					2,572			59
Ending Balance at Jun. 30, 2012	48,179	16,279	25	6	0	40,761	14,626	(7,517)	(170)	448
Beginning Balance at Dec. 31, 2012	49,796	16,998	25	6	0	40,547	16,280	(7,517)	15	440
Stock compensation plans	84					296	(212)
Repurchase and retirements of common stock	(1,000)					(296)	(704)
Employee stock purchase plans	49					49
Dividends declared	(1,026)						(1,026)
Other comprehensive income (loss)	88	(9)							88
Purchase of NBCUniversal noncontrolling common equity interest	(1,508)	(17,006)				(1,482)			(26)
Redeemable subsidiary preferred stock		725
Contributions from (distributions to) noncontrolling interests, net	(84)	(12)								(84)
Other	(131)	(14)				(123)				(8)
Net income (loss)	3,218	171					3,171			47
Ending Balance at Jun. 30, 2013	$ 49,486	$ 853	$ 25	$ 6	$ 0	$ 38,991	$ 17,509	$ (7,517)	$ 77	$ 395

Condensed Consolidated Financial Statements

6 Months Ended

Jun. 30, 2013

Condensed Consolidated Financial Statements [Abstract]

Condensed Consolidated Financial Statements

Note 1: Condensed Consolidated Financial Statements

Basis of Presentation

We have prepared these unaudited condensed consolidated financial statements based on Securities and Exchange Commission (“SEC”) rules that permit reduced disclosure for interim periods. These financial statements include all adjustments that are necessary for a fair presentation of our consolidated results of operations, financial condition and cash flows for the periods shown, including normal, recurring accruals and other items. The consolidated results of operations for the interim periods presented are not necessarily indicative of results for the full year.

The year-end condensed consolidated balance sheet was derived from audited financial statements but does not include all disclosures required by generally accepted accounting principles in the United States (“GAAP”). For a more complete discussion of our accounting policies and certain other information, refer to our consolidated financial statements included in our 2012 Annual Report on Form 10-K.

Reclassifications have been made to our condensed consolidated financial statements for the prior year to conform to classifications used in the current period.

Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share

Earnings Per Share

Note 2: Earnings Per Share

Computation of Diluted EPS
		Three Months Ended June 30
			2013					2012
(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
Basic EPS attributable to Comcast Corporation shareholders		$	1,734	2,631	$	0.66	$	1,348	2,687	$	0.50
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock
	plans			35					30
Diluted EPS attributable to Comcast Corporation
	shareholders	$	1,734	2,666	$	0.65	$	1,348	2,717	$	0.50

		Six Months Ended June 30
			2013					2012
(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
Basic EPS attributable to Comcast Corporation shareholders		$	3,171	2,633	$	1.20	$	2,572	2,697	$	0.95
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock
	plans			39					36
Diluted EPS attributable to Comcast Corporation
	shareholders	$	3,171	2,672	$	1.19	$	2,572	2,733	$	0.94

Our potentially dilutive securities include potential common shares related to our stock options and our restricted share units (“RSUs”). Diluted earnings per common share attributable to Comcast Corporation shareholders (“diluted EPS”) considers the impact of potentially dilutive securities using the treasury stock method. Diluted EPS excludes the impact of potential common shares related to our stock options in periods in which the option exercise price is greater than the average market price of our Class A common stock or our Class A Special common stock, as applicable.

Diluted EPS for the three and six months ended June 30, 2013 excludes 18 million and 10 million, respectively, of potential common shares related to our share-based compensation plans, because the inclusion of the potential common shares would have had an antidilutive effect. For the three and six months ended June 30, 2012, diluted EPS excluded 44 million and 35 million, respectively, of potential common shares.

Significant Transactions

6 Months Ended

Jun. 30, 2013

Significant Transactions [Abstract]

Significant Transactions

Note 3: Significant Transactions

On March 19, 2013, we acquired GE's 49% common equity interest in NBCUniversal Holdings for approximately $16.7 billion (the “Redemption Transaction”). In addition to this transaction, NBCUniversal purchased from GE certain properties it occupies at 30 Rockefeller Plaza in New York City and CNBC's headquarters in Englewood Cliffs, New Jersey for approximately $1.4 billion.

The total consideration for these transactions consisted of $11.4 billion of cash on hand; $4 billion of senior debt securities issued by NBCUniversal Enterprise, Inc. (“NBCUniversal Enterprise”), a holding company whose principal assets are its interests in NBCUniversal Holdings; $750 million of cash funded through our commercial paper program; $1.25 billion of borrowings under NBCUniversal Enterprise's credit facility, which replaced NBCUniversal's credit facility; and $725 million aggregate liquidation preference of Series A cumulative preferred stock of NBCUniversal Enterprise. See Note 7 for additional information on NBCUniversal Enterprise's senior debt securities and credit facility.

Following the close of the Redemption Transaction, we control and consolidate NBCUniversal Enterprise and own all of its capital stock other than its preferred stock. NBCUniversal Enterprise's senior debt securities and credit facility are guaranteed by us and four of our wholly owned cable holding company subsidiaries, but are not guaranteed by NBCUniversal. In March 2013, NBCUniversal became a part of our existing cross-guarantee structure. See Note 15 for additional information on our cross-guarantee structure.

After the close of the transaction, GE sold the interests in NBCUniversal Enterprise's senior debt securities and preferred stock it acquired in the Redemption Transaction to unaffiliated third parties. The preferred stock pays dividends at a fixed rate of 5.25% per annum and the holders have the right to cause NBCUniversal Enterprise to redeem their shares at a price equal to the liquidation preference plus accrued but unpaid dividends for a 30 day period beginning on March 19, 2020 and thereafter on every third anniversary of such date (each such date, a “put date”). Shares of preferred stock can be called for redemption by NBCUniversal Enterprise at a price equal to the liquidation preference plus accrued but unpaid dividends one year following each put date applicable to such shares. Because certain of these redemption provisions are outside of our control, the NBCUniversal Enterprise preferred stock is presented outside of equity under the caption “redeemable noncontrolling interests and redeemable subsidiary preferred stock” in our condensed consolidated balance sheet. Its initial value was based on the liquidation preference of the preferred stock and is adjusted for accrued but unpaid dividends.

We recognized an increase to our deferred tax liabilities of $1.5 billion primarily due to an increase in our financial reporting basis in the consolidated net assets of NBCUniversal Holdings in excess of the tax basis following the Redemption Transaction. In addition, our condensed consolidated balance sheet now includes certain tax liabilities of NBCUniversal Enterprise related to periods prior to our acquisition of the common stock of NBCUniversal Enterprise for which we have been indemnified by GE and have recorded a related indemnification asset. We also expect to realize additional tax benefits in the future as a result of the Redemption Transaction, which are expected to increase the amounts we have agreed to share with GE. Our expected future payments to GE are accounted for as contingent consideration. See Note 8 for additional information on the fair value of this contingent consideration as of June 30, 2013.

Because we maintained control of NBCUniversal Holdings, the difference between the consideration transferred and the recorded value of GE's 49% redeemable noncontrolling common equity interest, and the related tax impacts, were recorded to additional paid-in capital. The related tax impacts are preliminary and subject to change as we obtain the information necessary to complete our analysis.

Film and Television Costs

6 Months Ended

Jun. 30, 2013

Film And Television Costs [Abstract]

Film and Television Costs

Note 4: Film and Television Costs

			June 30,		December 31,
(in millions)			2013		2012
Film Costs:
	Released, less amortization	$	1,442	$	1,472
	Completed, not released		260		99
	In production and in development		389		1,048
			2,091		2,619
Television Costs:
	Released, less amortization		1,130		1,124
	In production and in development		270		334
			1,400		1,458
Programming rights, less amortization			1,708		1,886
			5,199		5,963
Less: Current portion of programming rights			859		909
Film and television costs		$	4,340	$	5,054

Investments

6 Months Ended

Jun. 30, 2013

Investments

Investments

Note 5: Investments

			June 30,		December 31,
(in millions)			2013		2012
Fair Value Method		$	5,809	$	4,493
Equity Method:
	The Weather Channel		328		471
	Other		754		693
			1,082		1,164
Cost Method:
	AirTouch		1,545		1,538
	Other		628		594
			2,173		2,132
Total investments			9,064		7,789
Less: Current investments			3,765		1,464
Noncurrent investments		$	5,299	$	6,325

Investment Income (Loss), Net
		Three Months Ended				Six Months Ended
		June 30				June 30
(in millions)		2013		2012		2013		2012
Gains on sales and exchanges of investments, net		$	3	$	20	$	38	$	27
Investment impairment losses			(4)		(9)		(13)		(21)
Unrealized gains (losses) on securities underlying prepaid
	forward sale agreements		247		(28)		852		488
Mark to market adjustments on derivative component of prepaid
	forward sale agreements and indexed debt instruments		(239)		20		(841)		(450)
Interest and dividend income			26		28		56		57
Other, net			(20)		(23)		(7)		(1)
Investment income (loss), net		$	13	$	8	$	85	$	100

Fair Value Method

As of June 30, 2013, the majority of our fair value method investments were equity securities held as collateral that were related to our obligations under prepaid forward sale agreements.

Prepaid Forward Sale Agreements
		June 30,		December 31,
(in millions)		2013		2012
Assets:
	Fair value equity securities held	$	4,787	$	4,143

Liabilities:
	Obligations under prepaid forward sale agreements	$	1,142	$	1,248
	Derivative component of prepaid forward sale agreements		3,133		2,302
Total liabilities		$	4,275	$	3,550

As of June 30, 2013, our prepaid forward sale obligations had an estimated fair value of $4.3 billion. The estimated fair values are based on Level 2 inputs using pricing models whose inputs are derived primarily from or corroborated by observable market data through correlation or other means for substantially the full term of the financial instrument.

Clearwire

In July 2013, in connection with Sprint's acquisition of Clearwire Corporation (“Clearwire”), Sprint acquired our investment of 89 million Class A shares of Clearwire for $443 million, which also represents the fair value of this investment as of June 30, 2013. The cumulative unrealized gain included in accumulated other comprehensive income as of June 30, 2013 associated with this investment was $443 million, and we expect to recognize this gain in our condensed consolidated statement of income in the third quarter of 2013.

Equity Method

In June 2013, NBCUniversal received a distribution from The Weather Channel Holding Corp. (“The Weather Channel”) of $152 million, of which $128 million was recorded as a return of its investment in The Weather Channel and included under the caption “return of capital from investees” in our condensed consolidated statement of cash flows.

Cost Method

We hold two series of preferred stock of AirTouch Communications, Inc. (“AirTouch”), a subsidiary of Vodafone, which are redeemable in April 2020. As of June 30, 2013, the estimated fair values of the AirTouch preferred stock and the associated liability related to redeemable preferred shares issued by one of our consolidated subsidiaries were $1.7 billion. The estimated fair values are based on Level 2 inputs using pricing models whose inputs are derived primarily from or corroborated by observable market data through correlation or other means for substantially the full term of the financial instruments.

Goodwill

6 Months Ended

Jun. 30, 2013

Goodwill [Abstract]

Goodwill

Note 6: Goodwill

			NBCUniversal
(in millions)		Cable Communications		Cable Networks		Broadcast Television		Filmed Entertainment		Theme Parks		Corporate and Other		Total
Balance, December 31, 2012	$	12,206	$	13,026	$	761	$	1	$	982	$	9	$	26,985
Acquisitions		-		17		-		-		-		-		17
Adjustments		-		67		5		-		-		1		73
Balance, June 30, 2013	$	12,206	$	13,110	$	766	$	1	$	982	$	10	$	27,075

Adjustments to goodwill during the six months ended June 30, 2013 were primarily related to an immaterial correction to the allocation of purchase price associated with the January 2011 NBCUniversal transaction.

Long-Term Debt

6 Months Ended

Jun. 30, 2013

Long-term Debt

Long-Term Debt

Note 7: Long-Term Debt

Long-Term Debt Outstanding

	Weighted-Average Interest		June 30,		December 31,
(in millions)	Rate as of June 30, 2013		2013		2012
Commercial paper	0.330	%	$	350	$	-
Revolving credit facilities	1.273	%		1,250		-
Senior notes with maturities of 5 years or less	4.758	%		15,358		12,991
Senior notes with maturities between 6 and 10 years	4.558	%		11,534		10,334
Senior notes with maturities greater than 10 years	5.999	%		17,923		16,801
Other, including capital lease obligations	–			234		332
Total debt	4.90	%^(a)		46,649		40,458
Less: Current portion				2,535		2,376
Long-term debt			$	44,114	$	38,082
(a) Includes the effects of our derivative financial instruments.

As of June 30, 2013, our debt had an estimated fair value of $51.6 billion. The estimated fair value of our publicly traded debt is based on quoted market values for the debt. To estimate the fair value of debt for which there are no quoted market prices, we use interest rates available to us for debt with similar terms and remaining maturities.

Redemption Transaction

The Redemption Transaction resulted in the consolidation of an additional $4 billion aggregate principal amount of senior notes issued by NBCUniversal Enterprise and $1.25 billion of borrowings under the NBCUniversal Enterprise credit facility. The total consideration for the Redemption Transaction also included $750 million of cash funded through our commercial paper program.

The NBCUniversal Enterprise senior notes are comprised of $1.1 billion aggregate principal amount of 1.662% senior notes due 2018, $1.5 billion aggregate principal amount of 1.974% senior notes due 2019, $700 million aggregate principal amount of floating rate senior notes due 2016 and $700 million aggregate principal amount of floating rate senior notes due 2018. The floating rate senior notes due 2016 and 2018 accrue interest for each quarterly interest period at a rate equal to the three-month London Interbank Offered Rate (“LIBOR”) plus 0.537% and 0.685%, respectively.

On March 19, 2013, NBCUniversal Enterprise amended and restated the existing credit agreement of NBCUniversal to, among other things, substitute NBCUniversal Enterprise for NBCUniversal as the sole borrower, reduce the borrowing capacity of the facility from $1.5 billion to $1.35 billion, extend the term of the facility to March 2018 and revise the interest rate on borrowings. The interest rate on the credit facility consists of a base rate plus a borrowing margin that is determined based on our credit rating. As of June 30, 2013, the interest rate was 1.273%.

Debt Borrowings

In January 2013, we issued $750 million aggregate principal amount of 2.850% senior notes due 2023, $1.7 billion aggregate principal amount of 4.250% senior notes due 2033 and $500 million aggregate principal amount of 4.500% senior notes due 2043.

Commercial Paper Program

During the six months ended June 30, 2013, borrowings, net of repayments of commercial paper under our commercial paper program, were $350 million. Following the amendments to the NBCUniversal credit agreement, NBCUniversal's commercial paper program was terminated.

Revolving Credit Facilities

As of June 30, 2013, amounts available under our consolidated revolving credit facilities, net of amounts outstanding under our commercial paper program and undrawn letters of credit, totaled $5.7 billion, which included $100 million available under NBCUniversal Enterprise's credit facility.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Fair Value Measurements

6 Months Ended

Jun. 30, 2013

Fair Value Measurements [Abstract]

Fair Value Measurements

Note 8: Fair Value Measurements

The accounting guidance related to financial assets and financial liabilities (“financial instruments”) establishes a hierarchy that prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach and cost approach). Level 1 consists of financial instruments whose values are based on quoted market prices for identical financial instruments in an active market. Level 2 consists of financial instruments that are valued using models or other valuation methodologies. These models use inputs that are observable either directly or indirectly. Level 3 consists of financial instruments whose values are determined using pricing models that use significant inputs that are primarily unobservable, discounted cash flow methodologies or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Our financial instruments that are accounted for at fair value on a recurring basis are presented in the table below.

Recurring Fair Value Measures
		Fair Value as of
		June 30, 2013								December 31, 2012
(in millions)			Level 1		Level 2		Level 3		Total		Total
Assets
Trading securities		$	5,092	$	-	$	-	$	5,092	$	4,027
Available-for-sale securities			596		103		18		717		464
Interest rate swap agreements			-		140		-		140		210
Other			-		18		-		18		38
Total		$	5,688	$	261	$	18	$	5,967	$	4,739
Liabilities
Derivative component of prepaid forward sale agreements
	and indexed debt instruments	$	-	$	3,133	$	-	$	3,133	$	2,305
Contractual obligations			-		-		1,105		1,105		1,055
Contingent consideration			-		-		689		689		587
Other			-		46		-		46		14
Total		$	-	$	3,179	$	1,794	$	4,973	$	3,961

Contractual Obligations and Contingent Consideration

The fair values of the contractual obligations and contingent consideration in the table above are primarily based on certain expected future discounted cash flows, the determination of which involves the use of significant unobservable inputs. The most significant unobservable inputs we use are our estimates of the future revenue we expect to generate from certain NBCUniversal entities, which are related to our contractual obligations, and future net tax benefits that will affect payments to GE, which are related to contingent consideration. The discount rates used in the measurements of fair value were between 5% and 14% and are based on the underlying risk associated with our estimate of future revenue, as well as the terms of the respective contracts, and the uncertainty in the timing of our payments to GE. The fair value adjustments to contractual obligations and contingent consideration are sensitive to the assumptions related to future revenue and tax benefits, respectively, as well as to current interest rates, and therefore, the adjustments are recorded to other income (expense), net in our condensed consolidated statement of income.

In May 2013, we entered into an agreement with the counterparty to one of NBCUniversal's contractual obligations under which, among other things, we will acquire the counterparty's interests in the related contract. We expect the transaction to close in the fourth quarter of 2013 and following the close of the transaction, the liability associated with this contractual obligation will no longer be recorded on our consolidated balance sheet. The fair value of this contractual obligation as of June 30, 2013 was $383 million.


Changes in Contractual Obligations and Contingent Consideration
(in millions)		Contractual Obligations		Contingent Consideration
Balance, December 31, 2012	$	1,055	$	587
Fair value adjustments		91		16
Payments		(41)		(85)
Redemption Transaction		-		171
Balance, June 30, 2013	$	1,105	$	689

Nonrecurring Fair Value Measures

We have assets and liabilities that we are required to record at fair value on a nonrecurring basis when certain circumstances occur. In the case of film or stage play production costs, upon the occurrence of an event or change in circumstance that may indicate that the fair value of a production is less than its unamortized costs, we determine the fair value of the production and record an adjustment for the amount by which the unamortized capitalized costs exceed the production's fair value. The estimate of fair value of a production is determined using Level 3 inputs, primarily an analysis of future expected cash flows. Adjustments to capitalized film production costs of $113 million and $64 million were recorded during the six months ended June 30, 2013 and 2012, respectively.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Noncontrolling Interests

6 Months Ended

Jun. 30, 2013

Noncontrolling Interests [Abstract]

Noncontrolling Interests

Note 9: Noncontrolling Interests

Certain of the subsidiaries that we consolidate are not wholly owned. Some of the agreements with the minority partners of these subsidiaries contain redemption features whereby interests held by the minority partners are redeemable either (i) at the option of the holder or (ii) upon the occurrence of an event that is not solely within our control. If interests were to be redeemed under these agreements, we would generally be required to purchase the interest at fair value on the date of redemption. These interests are presented on the balance sheet outside of equity as a component of the caption “redeemable noncontrolling interests and redeemable subsidiary preferred stock.” Noncontrolling interests and subsidiary preferred stock that do not contain such redemption features are presented in equity.

We acquired GE's 49% common equity interest in NBCUniversal Holdings, which had previously been presented as a redeemable noncontrolling interest in our condensed consolidated balance sheet. See Note 3 for additional information on the Redemption Transaction. The difference between the consideration transferred and the recorded value of GE's 49% redeemable noncontrolling common equity interest, as well as the related tax impacts, were recorded to additional paid-in capital. The table below includes the impact of the transaction on our changes in equity.

Changes in Equity
			Six Months Ended
			June 30
(in millions)			2013		2012
Net income attributable to Comcast Corporation			$	3,171	$	2,572
Transfers from (to) noncontrolling interests:
	Decrease in Comcast Corporation additional paid-in capital resulting from the
		purchase of GE’s redeemable noncontrolling common equity interest		(1,482)		-
	Other			(1)		2
Changes in equity resulting from net income attributable to Comcast Corporation
	and transfers from (to) noncontrolling interests		$	1,688	$	2,574

- Definition

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

+ References + Details

Share-Based Compensation

6 Months Ended

Jun. 30, 2013

Share-Based Compensation

Share-Based Compensation

Note 10: Share-Based Compensation

Our share-based compensation primarily consists of awards of stock options and RSUs to certain employees and directors and is awarded as part of our approach to long-term incentive compensation. Additionally, through our employee stock purchase plans, employees are able to purchase shares of Comcast Class A common stock at a discount through payroll deductions.

In March 2013, we granted 18.4 million stock options and 5.2 million RSUs related to our annual management awards. The weighted-average fair values associated with these grants were $8.80 per stock option and $37.85 per RSU.

Recognized Share-Based Compensation Expense
	Three Months Ended				Six Months Ended
	June 30				June 30
(in millions)	2013		2012		2013		2012
Stock options	$	36	$	38	$	68	$	67
Restricted share units		48		41		86		76
Employee stock purchase plans		5		3		11		8
Total	$	89	$	82	$	165	$	151

As of June 30, 2013, we had unrecognized pretax compensation expense of $384 million and $445 million related to nonvested stock options and nonvested RSUs, respectively.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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+ Details

Supplemental Financial Information

6 Months Ended

Jun. 30, 2013

Supplemental Financial Information [Abstract]

Supplemental Financial Information

Note 11: Supplemental Financial Information

Receivables
	June 30,		December 31,
(in millions)	2013		2012
Receivables, gross	$	5,958	$	6,026
Less: Allowance for returns and customer incentives		250		307
Less: Allowance for doubtful accounts		201		198
Receivables, net	$	5,507	$	5,521

Accumulated Other Comprehensive Income (Loss)
	June 30,		June 30,
(in millions)	2013		2012
Unrealized gains (losses) on marketable securities	$	277	$	22
Deferred gains (losses) on cash flow hedges		(54)		(125)
Unrecognized gains (losses) on employee benefit obligations		(107)		(59)
Cumulative translation adjustments		(39)		(8)
Accumulated other comprehensive income (loss), net of deferred taxes	$	77	$	(170)

Net Cash Provided by Operating Activities
		Six Months Ended
		June 30
(in millions)		2013		2012
Net income		$	3,389	$	3,080
Adjustments to reconcile net income to net cash provided by operating activities:
	Depreciation and amortization		3,957		3,855
	Amortization of film and television costs		4,080		4,156
	Share-based compensation		213		189
	Noncash interest expense (income), net		81		105
	Equity in net (income) losses of investees, net		(34)		(32)
	Cash received from investees		72		142
	Net (gain) loss on investment activity and other		(91)		(27)
	Deferred income taxes		87		41
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
	Change in current and noncurrent receivables, net		58		(16)
	Change in film and television costs		(3,330)		(4,177)
	Change in accounts payable and accrued expenses related to trade creditors		(87)		111
	Change in other operating assets and liabilities		(710)		388
Net cash provided by operating activities		$	7,685	$	7,815

Cash Payments for Interest and Income Taxes
	Three Months Ended				Six Months Ended
	June 30				June 30
(in millions)		2013		2012		2013		2012
Interest	$	515	$	544	$	1,132	$	1,158
Income taxes	$	1,761	$	904	$	2,222	$	1,022

Noncash Investing and Financing Activities

During the six months ended June 30, 2013:

• we acquired GE's 49% common equity interest in NBCUniversal Holdings for total consideration of $16.7 billion, which included noncash consideration of $6 billion from the consolidation of NBCUniversal Enterprise that was comprised of $4 billion aggregate principal amount of senior notes, $1.25 billion of borrowings under its credit facility and $725 million aggregate liquidation preference of its Series A cumulative preferred stock (see Note 3 for additional information on the Redemption Transaction)

• we acquired $573 million of property and equipment and intangible assets that were accrued but unpaid

• we recorded a liability of $512 million for a quarterly cash dividend of $0.195 per common share paid in July 2013

Receivables Monetization

6 Months Ended

Jun. 30, 2013

Receivables Monetization [Abstract]

Receivables Monetization

Note 12: Receivables Monetization

NBCUniversal monetizes certain of its accounts receivable under programs with a syndicate of banks. We account for receivables monetized through these programs as sales in accordance with the appropriate accounting guidance. We receive deferred consideration from the assets sold in the form of a receivable, which is funded by residual cash flows after the senior interests have been fully paid. The deferred consideration is included in receivables, net at its initial fair value, which reflects the net cash flows we expect to receive related to these interests. The accounts receivable we sold that underlie the deferred consideration are generally short-term in nature and, therefore, the fair value of the deferred consideration approximated its carrying value as of June 30, 2013 and December 31, 2012.

NBCUniversal is responsible for servicing the receivables and remitting collections to the purchasers under the monetization programs. NBCUniversal performs this service for a fee that is equal to the prevailing market rate for such services. As a result, no servicing asset or liability has been recorded on our condensed consolidated balance sheet as of June 30, 2013 and December 31, 2012. The servicing fees are recorded as a component of other income (expense), net.

The net cash payments on transfers that are included within net cash provided by operating activities in our condensed consolidated statement of cash flows were $178 million and $223 million for the six months ended June 30, 2013 and 2012, respectively. The receivables monetization program did not have a material effect on our condensed consolidated statement of income for the periods presented.

Receivables Monetized and Deferred Consideration
	June 30,		December 31,
(in millions)	2013		2012
Monetized receivables sold	$	749	$	791
Deferred consideration	$	252	$	274

In addition to the amounts presented above, we had $730 million and $882 million payable to our monetization programs as of June 30, 2013 and December 31, 2012, respectively. These amounts represent cash receipts that were not yet remitted to the monetization programs as of the balance sheet date and are recorded to accounts payable and accrued expenses related to trade creditors.

Commitments and Contingencies

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies [Abstract]

Commitments and Contingencies

Note 13: Commitments and Contingencies

Commitments

Station Venture

NBCUniversal previously held an equity interest in Station Venture Holdings, LLC (“Station Venture”), a nonconsolidated variable interest entity, and the remaining equity interests in Station Venture were held by LIN TV, Corp. Station Venture was the obligor on an $816 million senior secured note (the “Station Venture note”) that was due in 2023 to General Electric Capital Corporation (“GECC”) as servicer. The Station Venture note, among other things, was collateralized by substantially all of the assets of Station Venture and Station Venture Operations, LP (“Station LP”). Station LP was a less than wholly owned consolidated subsidiary of NBCUniversal. In connection with the acquisition of our controlling interest in NBCUniversal Holdings on January 28, 2011, a liability of $482 million was recorded to noncurrent liabilities in our allocation of purchase price, which represented the fair value of the net assets of Station LP. In February 2013, we closed our agreement with GE, GECC and LIN TV under which, among other things, NBCUniversal purchased the Station Venture note from GECC for $602 million, representing the agreed upon fair value of the assets of Station LP. As of the closing date of the transaction, the $482 million recorded liability was effectively settled, and Station Venture and Station LP became wholly owned subsidiaries of NBCUniversal. We now consolidate Station Venture, and the Station Venture note is eliminated in consolidation. Due to the related party nature of this transaction, the excess of the purchase price of the Station Venture note over the recorded amount of the liability was recorded to additional paid-in capital.

Contingencies

Antitrust Cases

We are defendants in two purported class actions originally filed in December 2003 in the United States District Courts for the District of Massachusetts and the Eastern District of Pennsylvania. The potential class in the Massachusetts case, which has been transferred to the Eastern District of Pennsylvania, is our customer base in the “Boston Cluster” area, and the potential class in the Pennsylvania case is our customer base in the “Philadelphia and Chicago Clusters,” as those terms are defined in the complaints. In each case, the plaintiffs allege that certain customer exchange transactions with other cable providers resulted in unlawful horizontal market restraints in those areas and seek damages under antitrust statutes, including treble damages.

Classes of Chicago Cluster and Philadelphia Cluster customers were certified in October 2007 and January 2010, respectively. We appealed the class certification in the Philadelphia Cluster case to the Third Circuit Court of Appeals, which affirmed the class certification in August 2011 and denied our petition for a rehearing en banc in September 2011. In March 2010, we moved for summary judgment dismissing all of the plaintiffs' claims in the Philadelphia Cluster. In April 2012, the District Court issued a decision dismissing some of the plaintiffs' claims, but allowing two claims to proceed to trial. The plaintiffs' claims concerning the other two clusters are stayed pending determination of the Philadelphia Cluster claims. In June 2012, the U.S. Supreme Court granted our petition to review the Third Circuit Court of Appeals' ruling and in September 2012, the trial court stayed all proceedings pending resolution of the Supreme Court appeal. In March 2013, the Supreme Court ruled that the class had been improperly certified and reversed the judgment of the Third Circuit. The matter has been returned to the District Court for action consistent with the Supreme Court's opinion.

In addition, we are the defendant in 22 purported class actions filed in federal district courts throughout the country. All of these actions have been consolidated by the Judicial Panel on Multidistrict Litigation in the United States District Court for the Eastern District of Pennsylvania for pre-trial proceedings. In a consolidated complaint filed in November 2009 on behalf of all plaintiffs in the multidistrict litigation, the plaintiffs allege that we improperly “tie” the rental of set-top boxes to the provision of premium cable services in violation of Section 1 of the Sherman Antitrust Act, various state antitrust laws and unfair/deceptive trade practices acts in California, Illinois and Alabama. The plaintiffs also allege a claim for unjust enrichment and seek relief on behalf of a nationwide class of our premium cable customers and on behalf of subclasses consisting of premium cable customers from California, Alabama, Illinois, Pennsylvania and Washington. In January 2010, we moved to compel arbitration of the plaintiffs' claims for unjust enrichment and violations of the unfair/deceptive trade practices acts of Illinois and Alabama. In September 2010, the plaintiffs filed an amended complaint alleging violations of additional state antitrust laws and unfair/deceptive trade practices acts on behalf of new subclasses in Connecticut, Florida, Minnesota, Missouri, New Jersey, New Mexico and West Virginia. In the amended complaint, plaintiffs omitted their unjust enrichment claim, as well as their state law claims on behalf of the Alabama, Illinois and Pennsylvania subclasses. In June 2011, the plaintiffs filed another amended complaint alleging only violations of Section 1 of the Sherman Antitrust Act, antitrust law in Washington and unfair/deceptive trade practices acts in California and Washington. The plaintiffs seek relief on behalf of a nationwide class of our premium cable customers and on behalf of subclasses consisting of premium cable customers from California and Washington. In July 2011, we moved to compel arbitration of most of the plaintiffs' claims and to stay the remaining claims pending arbitration. The West Virginia Attorney General also filed a complaint in West Virginia state court in July 2009 alleging that we improperly “tie” the rental of set-top boxes to the provision of digital cable services in violation of the West Virginia Antitrust Act and the West Virginia Consumer Credit and Protection Act. The Attorney General also alleges a claim for unjust enrichment/restitution. We removed the case to the United States District Court for West Virginia, and it was subsequently transferred to the United States District Court for the Eastern District of Pennsylvania and consolidated with the multidistrict litigation described above. In June 2013, a comprehensive settlement agreement for all 23 cases was submitted to the District Court for preliminary approval. Regardless of whether this settlement agreement is approved, we do not expect these cases to have a material effect on our results of operations, cash flows or financial position.

We believe the claims in each of the pending actions described above in this item are without merit and intend to defend the actions vigorously. We cannot predict the outcome of any of the actions described above, including a range of possible loss, or how the final resolution of any such actions would impact our results of operations or cash flows for any one period or our consolidated financial position. In addition, as any action nears a trial, there is an increased possibility that the action may be settled by the parties. Nevertheless, the final disposition of any of the above actions is not expected to have a material adverse effect on our consolidated financial position, but could possibly be material to our consolidated results of operations or cash flows for any one period.

Other

We are a defendant in several unrelated lawsuits claiming infringement of various patents relating to various aspects of our businesses. In certain of these cases other industry participants are also defendants, and also in certain of these cases we expect that any potential liability would be in part or in whole the responsibility of our equipment and technology vendors under applicable contractual indemnification provisions. We are also subject to other legal proceedings and claims that arise in the ordinary course of our business. While the amount of ultimate liability with respect to such actions is not expected to materially affect our results of operations, cash flows or financial position, any litigation resulting from any such legal proceedings or claims could be time consuming, costly and injure our reputation.

- Definition

The entire disclosure for commitments and contingencies.

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+ Details

Financial Data by Business Segment

6 Months Ended

Jun. 30, 2013

Financial Data By Business Segment [Abstract]

Financial Data by Business Segment

Note 14: Financial Data by Business Segment

We present our operations in five reportable business segments:

• Cable Communications: Consists of the operations of Comcast Cable, which is the nation's largest provider of video, high-speed Internet and voice services (“cable services”) to residential customers under the XFINITY brand, and we also provide these services to businesses and sell advertising.

• Cable Networks: Consists primarily of our national cable networks, our regional sports and news networks, our international cable networks, our cable television production operations, and our related digital media properties.

• Broadcast Television: Consists primarily of the NBC and Telemundo broadcast networks, our NBC and Telemundo owned local broadcast television stations, our broadcast television production operations, and our related digital media properties.

• Filmed Entertainment: Consists primarily of the operations of Universal Pictures, which produces, acquires, markets and distributes filmed entertainment worldwide.

• Theme Parks: Consists primarily of our Universal theme parks in Orlando and Hollywood.

In evaluating the profitability of our operating segments, the components of net income (loss) below operating income (loss) before depreciation and amortization are not separately evaluated by our management. Our financial data by business segment is presented in the tables below.

		Three Months Ended June 30, 2013
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	10,467	$	4,335	$	1,623	$	2,712	$	1,240
NBCUniversal
	Cable Networks		2,413		860		182		678		24
	Broadcast Television		1,732		206		26		180		9
	Filmed Entertainment		1,388		33		3		30		1
	Theme Parks		546		231		73		158		147
	Headquarters and Other^(b)		9		(137)		65		(202)		79
	Eliminations^(c)		(93)		(2)		-		(2)		-
NBCUniversal			5,995		1,191		349		842		260
Corporate and Other			136		(119)		17		(136)		6
Eliminations^(c)			(328)		18		1		17		-
Comcast Consolidated		$	16,270	$	5,425	$	1,990	$	3,435	$	1,506

		Three Months Ended June 30, 2012
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	9,897	$	4,101	$	1,593	$	2,508	$	1,124
NBCUniversal
	Cable Networks		2,240		790		182		608		22
	Broadcast Television		1,552		194		22		172		11
	Filmed Entertainment		1,231		(83)		4		(87)		3
	Theme Parks		539		235		63		172		52
	Headquarters and Other^(b)		11		(155)		48		(203)		68
	Eliminations^(c)		(69)		1		1		-		-
NBCUniversal			5,504		982		320		662		156
Corporate and Other			130		(90)		16		(106)		7
Eliminations^(c)			(320)		11		(4)		15		-
Comcast Consolidated		$	15,211	$	5,004	$	1,925	$	3,079	$	1,287

		Six Months Ended June 30, 2013
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	20,684	$	8,554	$	3,231	$	5,323	$	2,334
NBCUniversal
	Cable Networks		4,638		1,719		366		1,353		48
	Broadcast Television		3,249		171		51		120		17
	Filmed Entertainment		2,604		102		7		95		3
	Theme Parks		1,008		404		145		259		285
	Headquarters and Other^(b)		18		(249)		124		(373)		170
	Eliminations^(c)		(182)		(3)		-		(3)		-
NBCUniversal			11,335		2,144		693		1,451		523
Corporate and Other			298		(202)		32		(234)		10
Eliminations^(c)			(737)		(37)		1		(38)		-
Comcast Consolidated		$	31,580	$	10,459	$	3,957	$	6,502	$	2,867

		Six Months Ended June 30, 2012
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	19,496	$	8,056	$	3,195	$	4,861	$	2,180
NBCUniversal
	Cable Networks		4,368		1,599		358		1,241		31
	Broadcast Television		3,413		180		45		135		19
	Filmed Entertainment		2,423		(77)		8		(85)		4
	Theme Parks		951		392		125		267		99
	Headquarters and Other^(b)		23		(301)		96		(397)		114
	Eliminations^(c)		(202)		2		-		2		-
NBCUniversal			10,976		1,795		632		1,163		267
Corporate and Other			304		(154)		30		(184)		14
Eliminations^(c)			(687)		(5)		(2)		(3)		-
Comcast Consolidated		$	30,089	$	9,692	$	3,855	$	5,837	$	2,461

(a) For the three and six months ended June 30, 2013 and 2012, Cable Communications segment revenue was derived from the following sources:

		Three Months Ended				Six Months Ended
		June 30				June 30
		2013		2012		2013		2012
Residential:
	Video	49.4	%	50.9	%	49.7	%	51.1	%
	High-speed Internet	24.5	%	24.0	%	24.6	%	24.1	%
	Voice	8.7	%	9.0	%	8.8	%	9.1	%
Business services		7.5	%	6.3	%	7.4	%	6.2	%
Advertising		5.3	%	5.6	%	5.1	%	5.3	%
Other		4.6	%	4.2	%	4.4	%	4.2	%
Total		100	%	100	%	100	%	100	%

Subscription revenue received from customers who purchase bundled services at a discounted rate is allocated proportionally to each service based on the individual service's price on a stand-alone basis. Beginning in 2013, revenue from certain business customers, such as hotels, restaurants and bars, is presented in business services revenue rather than in the video revenue line item. Reclassifications have been made for the prior year to conform to this presentation.

For the three and six months ended June 30, 2013, 2.8% and 2.9%, respectively, of Cable Communications revenue was derived from franchise and other regulatory fees. For both the three and six months ended June 30, 2012, 2.8% of Cable Communications revenue was derived from franchise and other regulatory fees.

NBCUniversal Headquarters and Other activities included costs associated with overhead, personnel costs and headquarter initiatives.
Included in Eliminations are transactions that our segments enter into with one another. The most common types of transactions are the following:

• our Cable Networks and Broadcast Television segments generate revenue by selling programming to our Cable Communications segment, which represents the substantial majority of the transactions among our segments
• our Cable Communications segment generates revenue by selling advertising and by selling the use of satellite feeds to our Cable Networks segment
• our Filmed Entertainment and Broadcast Television segments generate revenue by licensing content to our Cable Networks segment
• our Cable Communications segment receives incentives offered by our Cable Networks segment in connection with its distribution of the Cable Networks' content that are recorded as a reduction to programming expenses
No single customer accounted for a significant amount of revenue in any period.
We use operating income (loss) before depreciation and amortization, excluding impairment charges related to fixed and intangible assets and gains or losses from the sale of assets, if any, as the measure of profit or loss for our operating segments. This measure eliminates the significant level of noncash depreciation and amortization expense that results from the capital-intensive nature of certain of our businesses and from intangible assets recognized in business combinations. Additionally, it is unaffected by our capital structure or investment activities. We use this measure to evaluate our consolidated operating performance and the operating performance of our operating segments and to allocate resources and capital to our operating segments. It is also a significant performance measure in our annual incentive compensation programs. We believe that this measure is useful to investors because it is one of the bases for comparing our operating performance with that of other companies in our industries, although our measure may not be directly comparable to similar measures used by other companies. This measure should not be considered a substitute for operating income (loss), net income (loss) attributable to Comcast Corporation, net cash provided by operating activities, or other measures of performance or liquidity we have reported in accordance with GAAP.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Condensed Consolidating Financial Information

6 Months Ended

Jun. 30, 2013

Condensed Consolidating Financial Information [Abstract]

Condensed Consolidating Financial Information

Note 15: Condensed Consolidating Financial Information

Comcast Corporation (“Comcast Parent”) and four of our 100% owned cable holding company subsidiaries, Comcast Cable Communications, LLC (“CCCL Parent”), Comcast MO Group, Inc. (“Comcast MO Group”), Comcast Cable Holdings, LLC (“CCH”) and Comcast MO of Delaware, LLC (“Comcast MO of Delaware”) (collectively, the “cable guarantors”), have fully and unconditionally guaranteed each other's debt securities. Comcast MO Group, CCH and Comcast MO of Delaware are collectively referred to as the “Combined CCHMO Parents.”

On March 27, 2013, Comcast Parent, the cable guarantors and NBCUniversal Media, LLC (referred to as “NBCUniversal Media Parent” in the tables below) entered into a series of agreements and supplemental indentures to include NBCUniversal Media, LLC as part of our existing cross-guarantee structure. As members of the cross-guarantee structure, Comcast Parent and the cable guarantors fully and unconditionally guarantee NBCUniversal Media, LLC's public debt securities, and NBCUniversal Media, LLC fully and unconditionally guarantees all of Comcast's and the cable guarantors' public debt securities, as well as the Comcast and Comcast Cable Communications, LLC $6.25 billion revolving credit facility.

Comcast Parent and the cable guarantors also fully and unconditionally guarantee NBCUniversal Enterprise's $4 billion of senior notes and its $1.35 billion credit facility due March 2018. NBCUniversal Media, LLC does not guarantee the NBCUniversal Enterprise senior notes or credit facility.

Comcast Parent provides an unconditional subordinated guarantee of the $185 million principal amount currently outstanding of Comcast Holdings' ZONES due October 2029. Neither the cable guarantors nor NBCUniversal Media, LLC guarantee the Comcast Holdings ZONES due October 2029. None of Comcast Parent, the cable guarantors nor NBCUniversal Media, LLC guarantee the $62 million principal amount currently outstanding of Comcast Holdings' ZONES due November 2029.

Condensed Consolidating Balance Sheet
June 30, 2013

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Assets
	Cash and cash equivalents	$	-	$	-	$	-	$	-	$	351	$	1,038	$	-	$	1,389
	Investments		-		-		-		-		-		3,765		-		3,765
	Receivables, net		-		-		-		-		-		5,507		-		5,507
	Programming rights		-		-		-		-		-		859		-		859
	Other current assets		237		-		2		2		58		916		-		1,215
Total current assets			237		-		2		2		409		12,085		-		12,735
Film and television costs			-		-		-		-		-		4,340		-		4,340
Investments			8		-		-		-		381		4,910		-		5,299
Investments in and amounts due from subsidiaries eliminated upon consolidation			77,490		93,560		98,253		52,060		40,426		80,780		(442,569)		-
Property and equipment, net			229		-		-		-		-		28,026		-		28,255
Franchise rights			-		-		-		-		-		59,364		-		59,364
Goodwill			-		-		-		-		-		27,075		-		27,075
Other intangible assets, net			10		-		-		-		-		17,430		-		17,440
Other noncurrent assets, net			1,023		145		-		-		108		1,911		(876)		2,311
Total assets		$	78,997	$	93,705	$	98,255	$	52,062	$	41,324	$	235,921	$	(443,445)	$	156,819

Liabilities and Equity
	Accounts payable and accrued expenses related to trade creditors	$	11	$	-	$	-	$	-	$	-	$	6,066	$	-	$	6,077
	Accrued participations and residuals		-		-		-		-		-		1,625		-		1,625
	Accrued expenses and other current liabilities		1,421		266		162		54		276		6,186		-		8,365
	Current portion of long-term debt		1,371		-		-		239		904		21		-		2,535
Total current liabilities			2,803		266		162		293		1,180		13,898		-		18,602
Long-term debt, less current portion			25,096		113		1,827		1,509		10,225		5,344		-		44,114
Deferred income taxes			-		769		-		-		76		31,193		(735)		31,303
Other noncurrent liabilities			2,007		-		-		-		990		9,605		(141)		12,461
Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		853		-		853
Equity:
	Common stock		31		-		-		-		-		-		-		31
	Other shareholders’ equity		49,060		92,557		96,266		50,260		28,853		174,633		(442,569)		49,060
Total Comcast Corporation
	shareholders’ equity		49,091		92,557		96,266		50,260		28,853		174,633		(442,569)		49,091
Noncontrolling interests			-		-		-		-		-		395		-		395
Total equity			49,091		92,557		96,266		50,260		28,853		175,028		(442,569)		49,486
Total liabilities and equity		$	78,997	$	93,705	$	98,255	$	52,062	$	41,324	$	235,921	$	(443,445)	$	156,819

Condensed Consolidating Balance Sheet
December 31, 2012

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Assets
	Cash and cash equivalents	$	-	$	-	$	-	$	-	$	5,129	$	5,822	$	-	$	10,951
	Investments		-		-		-		-		-		1,464		-		1,464
	Receivables, net		-		-		-		-		3		5,518		-		5,521
	Programming rights		-		-		-		-		-		909		-		909
	Other current assets		233		-		14		4		51		844		-		1,146
Total current assets			233		-		14		4		5,183		14,557		-		19,991
Film and television costs			-		-		-		-		-		5,054		-		5,054
Investments			-		-		-		-		529		5,796		-		6,325
Investments in and amounts due from subsidiaries eliminated upon consolidation			74,227		87,630		96,853		50,242		38,464		73,298		(420,714)		-
Property and equipment, net			242		-		-		-		-		26,990		-		27,232
Franchise rights			-		-		-		-		-		59,364		-		59,364
Goodwill			-		-		-		-		-		26,985		-		26,985
Other intangible assets, net			12		-		-		-		-		17,828		-		17,840
Other noncurrent assets, net			1,130		147		1		-		152		1,650		(900)		2,180
Total assets		$	75,844	$	87,777	$	96,868	$	50,246	$	44,328	$	231,522	$	(421,614)	$	164,971

Liabilities and Equity
	Accounts payable and accrued expenses related to trade creditors	$	8	$	-	$	-	$	-	$	-	$	6,198	$	-	$	6,206
	Accrued participations and residuals		-		-		-		-		-		1,350		-		1,350
	Accrued expenses and other current liabilities		1,290		275		210		54		263		4,690		-		6,782
	Current portion of long-term debt		-		-		2,105		241		7		23		-		2,376
Total current liabilities			1,298		275		2,315		295		270		12,261		-		16,714
Long-term debt, less current portion			23,306		113		1,827		1,512		11,219		105		-		38,082
Deferred income taxes			-		754		-		-		78		30,035		(757)		30,110
Other noncurrent liabilities			1,884		-		-		-		926		10,604		(143)		13,271
Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		16,998		-		16,998
Equity:
	Common stock		31		-		-		-		-		-		-		31
	Other shareholders’ equity		49,325		86,635		92,726		48,439		31,835		161,079		(420,714)		49,325
Total Comcast Corporation shareholders’ equity			49,356		86,635		92,726		48,439		31,835		161,079		(420,714)		49,356
Noncontrolling interests			-		-		-		-		-		440		-		440
Total equity			49,356		86,635		92,726		48,439		31,835		161,519		(420,714)		49,796
Total liabilities and equity		$	75,844	$	87,777	$	96,868	$	50,246	$	44,328	$	231,522	$	(421,614)	$	164,971

Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2013

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	16,270	$	-	$	16,270
	Management fee revenue		225		-		219		137		-		-		(581)		-
			225		-		219		137		-		16,270		(581)		16,270
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,968		-		4,968
	Other operating and administrative		101		-		219		137		205		4,489		(581)		4,570
	Advertising, marketing and promotion		-		-		-		-		-		1,307		-		1,307
	Depreciation		8		-		-		-		-		1,575		-		1,583
	Amortization		2		-		-		-		-		405		-		407
			111		-		219		137		205		12,744		(581)		12,835
Operating income (loss)			114		-		-		-		(205)		3,526		-		3,435
Other Income (Expense):
	Interest expense		(383)		(2)		(46)		(33)		(123)		(49)		-		(636)
	Investment income (loss), net		1		6		-		-		5		1		-		13
	Equity in net income
	(losses) of investees, net		1,910		1,909		1,835		1,349		951		646		(8,577)		23
	Other income (expense), net		(1)		-		2		-		-		(44)		-		(43)
			1,527		1,913		1,791		1,316		833		554		(8,577)		(643)
Income (loss) before income taxes			1,641		1,913		1,791		1,316		628		4,080		(8,577)		2,792
Income tax (expense) benefit			93		(1)		16		12		(5)		(1,163)		-		(1,048)
Net income (loss)			1,734		1,912		1,807		1,328		623		2,917		(8,577)		1,744
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(10)		-		(10)
Net income (loss) attributable
	to Comcast Corporation	$	1,734	$	1,912	$	1,807	$	1,328	$	623	$	2,907	$	(8,577)	$	1,734
Comprehensive income (loss)
	attributable to Comcast Corporation	$	1,822	$	1,905	$	1,808	$	1,328	$	599	$	3,007	$	(8,647)	$	1,822

Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2012

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	15,211	$	-	$	15,211
	Management fee revenue		210		-		205		127		-		-		(542)		-
			210		-		205		127		-		15,211		(542)		15,211
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,551		-		4,551
	Other operating and administrative		99		-		205		127		222		4,254		(542)		4,365
	Advertising, marketing and promotion		-		-		-		-		-		1,291		-		1,291
	Depreciation		8		-		-		-		-		1,508		-		1,516
	Amortization		1		-		-		-		-		408		-		409
			108		-		205		127		222		12,012		(542)		12,132
Operating income (loss)			102		-		-		-		(222)		3,199		-		3,079
Other Income (Expense):
	Interest expense		(354)		(8)		(83)		(33)		(105)		(42)		-		(625)
	Investment income (loss), net		2		1		-		-		-		5		-		8
	Equity in net income (losses) of
	investees, net		1,511		1,620		1,679		1,326		841		542		(7,490)		29
	Other income (expense), net		-		-		-		-		(12)		(35)		-		(47)
			1,159		1,613		1,596		1,293		724		470		(7,490)		(635)
Income (loss) before income taxes			1,261		1,613		1,596		1,293		502		3,669		(7,490)		2,444
Income tax (expense) benefit			87		2		29		11		11		(951)		-		(811)
Net income (loss)			1,348		1,615		1,625		1,304		513		2,718		(7,490)		1,633
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(285)		-		(285)
Net (income) loss
	attributable to Comcast Corporation	$	1,348	$	1,615	$	1,625	$	1,304	$	513	$	2,433	$	(7,490)	$	1,348
Comprehensive
	income (loss) attributable to Comcast Corporation	$	1,326	$	1,615	$	1,627	$	1,304	$	495	$	2,447	$	(7,488)	$	1,326

Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2013

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	31,580	$	-	$	31,580
	Management fee revenue		443		-		431		270		-		-		(1,144)		-
			443		-		431		270		-		31,580		(1,144)		31,580
Costs and Expenses:
	Programming and production		-		-		-		-		-		9,631		-		9,631
	Other operating and administrative		199		-		431		270		430		8,850		(1,144)		9,036
	Advertising, marketing and promotion		-		-		-		-		-		2,454		-		2,454
	Depreciation		15		-		-		-		-		3,134		-		3,149
	Amortization		3		-		-		-		-		805		-		808
			217		-		431		270		430		24,874		(1,144)		25,078
Operating income (loss)			226		-		-		-		(430)		6,706		-		6,502
Other Income (Expense):
	Interest expense		(759)		(5)		(124)		(66)		(243)		(92)		-		(1,289)
	Investment income (loss), net		2		3		-		-		1		79		-		85
	Equity in net income
	(losses) of investees, net		3,518		3,651		3,598		2,611		1,660		1,012		(16,016)		34
	Other income (expense), net		(2)		-		2		-		-		30		-		30
			2,759		3,649		3,476		2,545		1,418		1,029		(16,016)		(1,140)
Income (loss) before income taxes			2,985		3,649		3,476		2,545		988		7,735		(16,016)		5,362
Income tax (expense) benefit			186		1		43		23		(10)		(2,216)		-		(1,973)
Net income (loss)			3,171		3,650		3,519		2,568		978		5,519		(16,016)		3,389
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(218)		-		(218)
Net income (loss) attributable
	to Comcast Corporation	$	3,171	$	3,650	$	3,519	$	2,568	$	978	$	5,301	$	(16,016)	$	3,171
Comprehensive income (loss)
	attributable to Comcast Corporation	$	3,259	$	3,643	$	3,522	$	2,568	$	932	$	5,414	$	(16,079)	$	3,259

Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2012

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	30,089	$	-	$	30,089
	Management fee revenue		414		-		405		252		-		-		(1,071)		-
			414		-		405		252		-		30,089		(1,071)		30,089
Costs and Expenses:
	Programming and production		-		-		-		-		-		9,287		-		9,287
	Other operating and administrative		191		-		405		252		475		8,358		(1,071)		8,610
	Advertising, marketing and promotion		-		-		-		-		-		2,500		-		2,500
	Depreciation		15		-		-		-		-		3,030		-		3,045
	Amortization		2		-		-		-		-		808		-		810
			208		-		405		252		475		23,983		(1,071)		24,252
Operating income (loss)			206		-		-		-		(475)		6,106		-		5,837
Other Income (Expense):
	Interest expense		(721)		(16)		(165)		(69)		(207)		(87)		-		(1,265)
	Investment income (loss), net		3		1		-		-		-		96		-		100
	Equity in net income
	(losses) of investees, net		2,905		3,124		3,222		2,375		1,584		930		(14,108)		32
	Other income (expense), net		-		-		-		-		(13)		(50)		-		(63)
			2,187		3,109		3,057		2,306		1,364		889		(14,108)		(1,196)
Income (loss) before income taxes			2,393		3,109		3,057		2,306		889		6,995		(14,108)		4,641
Income tax (expense) benefit			179		5		58		24		9		(1,836)		-		(1,561)
Net income (loss)			2,572		3,114		3,115		2,330		898		5,159		(14,108)		3,080
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(508)		-		(508)
Net income (loss) attributable
	to Comcast Corporation	$	2,572	$	3,114	$	3,115	$	2,330	$	898	$	4,651	$	(14,108)	$	2,572
Comprehensive income (loss)
	attributable to Comcast Corporation	$	2,554	$	3,114	$	3,119	$	2,330	$	881	$	4,663	$	(14,107)	$	2,554

Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2013
(in millions)		Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities	$	(181)	$	(8)	$	(120)	$	(47)	$	(582)	$	8,623	$	-	$	7,685
Investing Activities:
Net transactions with affiliates		(1,301)		8		2,217		47		(984)		13		-		-
Capital expenditures		(2)		-		-		-		-		(2,865)		-		(2,867)
Cash paid for intangible assets		(1)		-		-		-		-		(443)		-		(444)
Acquisition of 30 Rockefeller Plaza properties		-		-		-		-		-		(1,311)		-		(1,311)
Proceeds from sales of businesses and investments		-		-		-		-		-		91		-		91
Return of capital from investees		-		-		-		-		128		18		-		146
Purchases of investments		(8)		-		-		-		(2)		(631)		-		(641)
Other		-		-		-		-		(10)		76		-		66
Net cash provided by (used in) investing activities		(1,312)		8		2,217		47		(868)		(5,052)		-		(4,960)
Financing Activities:
Proceeds from (repayments of) short-term borrowings, net		350		-		-		-		-		(2)		-		348
Proceeds from borrowings		2,933		-		-		-		-		-		-		2,933
Repurchases and repayments of debt		-		-		(2,097)		-		(88)		(10)		-		(2,195)
Repurchases and retirements of common stock		(1,000)		-		-		-		-		-		-		(1,000)
Dividends paid		(942)		-		-		-		-		-		-		(942)
Issuances of common stock		24		-		-		-		-		-		-		24
Purchase of NBCUniversal noncontrolling common equity interest		-		-		-		-		(3,200)		(7,561)		-		(10,761)
Distributions (to) from noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		(116)		-		(116)
Settlement of Station Venture liability										-		(602)				(602)
Other		128		-		-		-		(40)		(64)		-		24
Net cash provided by (used in) financing activities		1,493		-		(2,097)		-		(3,328)		(8,355)		-		(12,287)
Increase (decrease) in cash and cash equivalents		-		-		-		-		(4,778)		(4,784)		-		(9,562)
Cash and cash equivalents, beginning of period		-		-		-		-		5,129		5,822		-		10,951
Cash and cash equivalents, end of period	$	-	$	-	$	-	$	-	$	351	$	1,038	$	-	$	1,389

Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2012
(in millions)		Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities	$	(194)	$	6	$	(100)	$	(71)	$	(739)	$	8,913	$	-	$	7,815
Investing Activities:
Net transactions with affiliates		3,317		(6)		100		624		1,708		(5,743)		-		-
Capital expenditures		(4)		-		-		-		-		(2,457)		-		(2,461)
Cash paid for intangible assets		(4)		-		-		-		-		(410)		-		(414)
Proceeds from sales of businesses and investments		-		-		-		-		-		64		-		64
Return of capital from investees		-		-		-		-		-		7		-		7
Purchases of investments		-		-		-		-		(3)		(105)		-		(108)
Other		-		-		-		-		(12)		95		-		83
Net cash provided by (used in) investing activities		3,309		(6)		100		624		1,693		(8,549)		-		(2,829)
Financing Activities:
Proceeds from (repayments of) short-term borrowings, net		(1)		-		-		-		(550)		(3)		-		(554)
Repurchases and repayments of debt		(1,125)		-		-		(553)		-		(14)		-		(1,692)
Repurchases and retirements of common stock		(1,500)		-		-		-		-		-		-		(1,500)
Dividends paid		(741)		-		-		-		-		-		-		(741)
Issuances of common stock		184		-		-		-		-		-		-		184
Distributions (to) from noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		(233)		-		(233)
Other		68		-		-		-		-		(37)		-		31
Net cash provided by (used in) financing activities		(3,115)		-		-		(553)		(550)		(287)		-		(4,505)
Increase (decrease) in cash and cash equivalents		-		-		-		-		404		77		-		481
Cash and cash equivalents, beginning of period		-		-		-		-		238		1,382		-		1,620
Cash and cash equivalents, end of period	$	-	$	-	$	-	$	-	$	642	$	1,459	$	-	$	2,101

- Definition

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

+ References + Details

Accounting Policies (Policy)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Receivables Monetization

- Definition

Disclosure of accounting policy for transfers and servicing financial assets, including securitization transactions as well as repurchase and resale agreements. This disclosure may include how the entity (1) determines whether a transaction is accounted for as a sale; (2) accounts for a sale transaction, including the initial and subsequent accounting for any interests that the entity obtains or continues to hold in the transaction, how such interests are valued, and the significant assumptions used in the valuation; (3) accounts for a transaction that does not qualify for sale treatment (that is, a financing); and (4) accounts for its servicing assets and liabilities ("servicing"), including how such servicing is measured initially and subsequently, and the methodology and significant assumptions used to value such servicing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-URI http://asc.fasb.org/subtopic&trid=2197735

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 4
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-URI http://asc.fasb.org/subtopic&trid=2197663

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2197591

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2197627

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15029-111544

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7523297&loc=d3e113969-111729

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 41
-Paragraph 3
-Subparagraph a, b, c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph e, f
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph B6-B12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 9-15, 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share

Computation of diluted EPS

Computation of Diluted EPS
		Three Months Ended June 30
			2013					2012
(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
Basic EPS attributable to Comcast Corporation shareholders		$	1,734	2,631	$	0.66	$	1,348	2,687	$	0.50
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock
	plans			35					30
Diluted EPS attributable to Comcast Corporation
	shareholders	$	1,734	2,666	$	0.65	$	1,348	2,717	$	0.50

		Six Months Ended June 30
			2013					2012
(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
Basic EPS attributable to Comcast Corporation shareholders		$	3,171	2,633	$	1.20	$	2,572	2,697	$	0.95
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock
	plans			39					36
Diluted EPS attributable to Comcast Corporation
	shareholders	$	3,171	2,672	$	1.19	$	2,572	2,733	$	0.94

- Definition

Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.

+ References + Details

Film and Television Costs (Tables)

6 Months Ended

Jun. 30, 2013

Film And Television Costs [Abstract]

Film and Television Costs

			June 30,		December 31,
(in millions)			2013		2012
Film Costs:
	Released, less amortization	$	1,442	$	1,472
	Completed, not released		260		99
	In production and in development		389		1,048
			2,091		2,619
Television Costs:
	Released, less amortization		1,130		1,124
	In production and in development		270		334
			1,400		1,458
Programming rights, less amortization			1,708		1,886
			5,199		5,963
Less: Current portion of programming rights			859		909
Film and television costs		$	4,340	$	5,054

Investments (Tables)

6 Months Ended

Jun. 30, 2013

Investments

Investment Summary

			June 30,		December 31,
(in millions)			2013		2012
Fair Value Method		$	5,809	$	4,493
Equity Method:
	The Weather Channel		328		471
	Other		754		693
			1,082		1,164
Cost Method:
	AirTouch		1,545		1,538
	Other		628		594
			2,173		2,132
Total investments			9,064		7,789
Less: Current investments			3,765		1,464
Noncurrent investments		$	5,299	$	6,325

Investment Income (Loss), Net

Investment Income (Loss), Net
		Three Months Ended				Six Months Ended
		June 30				June 30
(in millions)		2013		2012		2013		2012
Gains on sales and exchanges of investments, net		$	3	$	20	$	38	$	27
Investment impairment losses			(4)		(9)		(13)		(21)
Unrealized gains (losses) on securities underlying prepaid
	forward sale agreements		247		(28)		852		488
Mark to market adjustments on derivative component of prepaid
	forward sale agreements and indexed debt instruments		(239)		20		(841)		(450)
Interest and dividend income			26		28		56		57
Other, net			(20)		(23)		(7)		(1)
Investment income (loss), net		$	13	$	8	$	85	$	100

Prepaid Forward Sale Agreements

Prepaid Forward Sale Agreements
		June 30,		December 31,
(in millions)		2013		2012
Assets:
	Fair value equity securities held	$	4,787	$	4,143

Liabilities:
	Obligations under prepaid forward sale agreements	$	1,142	$	1,248
	Derivative component of prepaid forward sale agreements		3,133		2,302
Total liabilities		$	4,275	$	3,550

Goodwill (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill [Abstract]

Schedule of Goodwill

			NBCUniversal
(in millions)		Cable Communications		Cable Networks		Broadcast Television		Filmed Entertainment		Theme Parks		Corporate and Other		Total
Balance, December 31, 2012	$	12,206	$	13,026	$	761	$	1	$	982	$	9	$	26,985
Acquisitions		-		17		-		-		-		-		17
Adjustments		-		67		5		-		-		1		73
Balance, June 30, 2013	$	12,206	$	13,110	$	766	$	1	$	982	$	10	$	27,075

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References + Details

Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2013

Schedule of Long-Term Debt

Long-Term Debt Outstanding

	Weighted-Average Interest		June 30,		December 31,
(in millions)	Rate as of June 30, 2013		2013		2012
Commercial paper	0.330	%	$	350	$	-
Revolving credit facilities	1.273	%		1,250		-
Senior notes with maturities of 5 years or less	4.758	%		15,358		12,991
Senior notes with maturities between 6 and 10 years	4.558	%		11,534		10,334
Senior notes with maturities greater than 10 years	5.999	%		17,923		16,801
Other, including capital lease obligations	–			234		332
Total debt	4.90	%^(a)		46,649		40,458
Less: Current portion				2,535		2,376
Long-term debt			$	44,114	$	38,082
(a) Includes the effects of our derivative financial instruments.

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Measurements [Abstract]

Fair Value Assets and Liabilities Measured on Recurring Basis

Recurring Fair Value Measures
		Fair Value as of
		June 30, 2013								December 31, 2012
(in millions)			Level 1		Level 2		Level 3		Total		Total
Assets
Trading securities		$	5,092	$	-	$	-	$	5,092	$	4,027
Available-for-sale securities			596		103		18		717		464
Interest rate swap agreements			-		140		-		140		210
Other			-		18		-		18		38
Total		$	5,688	$	261	$	18	$	5,967	$	4,739
Liabilities
Derivative component of prepaid forward sale agreements
	and indexed debt instruments	$	-	$	3,133	$	-	$	3,133	$	2,305
Contractual obligations			-		-		1,105		1,105		1,055
Contingent consideration			-		-		689		689		587
Other			-		46		-		46		14
Total		$	-	$	3,179	$	1,794	$	4,973	$	3,961

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]


Changes in Contractual Obligations and Contingent Consideration
(in millions)		Contractual Obligations		Contingent Consideration
Balance, December 31, 2012	$	1,055	$	587
Fair value adjustments		91		16
Payments		(41)		(85)
Redemption Transaction		-		171
Balance, June 30, 2013	$	1,105	$	689

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References + Details

Noncontrolling Interests (Tables)

6 Months Ended

Jun. 30, 2013

Noncontrolling Interests [Abstract]

Schedule Summarizing Changes in Equity Resulting from Net Income Attributable to Parent and Transfers to or from Noncontrolling Interests

Changes in Equity
			Six Months Ended
			June 30
(in millions)			2013		2012
Net income attributable to Comcast Corporation			$	3,171	$	2,572
Transfers from (to) noncontrolling interests:
	Decrease in Comcast Corporation additional paid-in capital resulting from the
		purchase of GE’s redeemable noncontrolling common equity interest		(1,482)		-
	Other			(1)		2
Changes in equity resulting from net income attributable to Comcast Corporation
	and transfers from (to) noncontrolling interests		$	1,688	$	2,574

Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Share-Based Compensation

Recognized Share-Based Compensation Expense

Recognized Share-Based Compensation Expense
	Three Months Ended				Six Months Ended
	June 30				June 30
(in millions)	2013		2012		2013		2012
Stock options	$	36	$	38	$	68	$	67
Restricted share units		48		41		86		76
Employee stock purchase plans		5		3		11		8
Total	$	89	$	82	$	165	$	151

Supplemental Financial Information (Tables)

6 Months Ended

Jun. 30, 2013

Supplemental Financial Information [Abstract]

Receivable

Receivables
	June 30,		December 31,
(in millions)	2013		2012
Receivables, gross	$	5,958	$	6,026
Less: Allowance for returns and customer incentives		250		307
Less: Allowance for doubtful accounts		201		198
Receivables, net	$	5,507	$	5,521

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)
	June 30,		June 30,
(in millions)	2013		2012
Unrealized gains (losses) on marketable securities	$	277	$	22
Deferred gains (losses) on cash flow hedges		(54)		(125)
Unrecognized gains (losses) on employee benefit obligations		(107)		(59)
Cumulative translation adjustments		(39)		(8)
Accumulated other comprehensive income (loss), net of deferred taxes	$	77	$	(170)

Schedule Of Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities

Net Cash Provided by Operating Activities
		Six Months Ended
		June 30
(in millions)		2013		2012
Net income		$	3,389	$	3,080
Adjustments to reconcile net income to net cash provided by operating activities:
	Depreciation and amortization		3,957		3,855
	Amortization of film and television costs		4,080		4,156
	Share-based compensation		213		189
	Noncash interest expense (income), net		81		105
	Equity in net (income) losses of investees, net		(34)		(32)
	Cash received from investees		72		142
	Net (gain) loss on investment activity and other		(91)		(27)
	Deferred income taxes		87		41
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
	Change in current and noncurrent receivables, net		58		(16)
	Change in film and television costs		(3,330)		(4,177)
	Change in accounts payable and accrued expenses related to trade creditors		(87)		111
	Change in other operating assets and liabilities		(710)		388
Net cash provided by operating activities		$	7,685	$	7,815

Cash Payments For Interest and Income Taxes

Cash Payments for Interest and Income Taxes
	Three Months Ended				Six Months Ended
	June 30				June 30
(in millions)		2013		2012		2013		2012
Interest	$	515	$	544	$	1,132	$	1,158
Income taxes	$	1,761	$	904	$	2,222	$	1,022

Receivables Monetization (Tables)

6 Months Ended

Jun. 30, 2013

Receivables Monetization [Abstract]

Receivables Monetized and Deferred Consideration

Receivables Monetized and Deferred Consideration
	June 30,		December 31,
(in millions)	2013		2012
Monetized receivables sold	$	749	$	791
Deferred consideration	$	252	$	274

Financial Data by Business Segment (Tables)

6 Months Ended

Jun. 30, 2013

Financial Data By Business Segment [Abstract]

Financial Data by Business Segment

		Three Months Ended June 30, 2013
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	10,467	$	4,335	$	1,623	$	2,712	$	1,240
NBCUniversal
	Cable Networks		2,413		860		182		678		24
	Broadcast Television		1,732		206		26		180		9
	Filmed Entertainment		1,388		33		3		30		1
	Theme Parks		546		231		73		158		147
	Headquarters and Other^(b)		9		(137)		65		(202)		79
	Eliminations^(c)		(93)		(2)		-		(2)		-
NBCUniversal			5,995		1,191		349		842		260
Corporate and Other			136		(119)		17		(136)		6
Eliminations^(c)			(328)		18		1		17		-
Comcast Consolidated		$	16,270	$	5,425	$	1,990	$	3,435	$	1,506

		Three Months Ended June 30, 2012
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	9,897	$	4,101	$	1,593	$	2,508	$	1,124
NBCUniversal
	Cable Networks		2,240		790		182		608		22
	Broadcast Television		1,552		194		22		172		11
	Filmed Entertainment		1,231		(83)		4		(87)		3
	Theme Parks		539		235		63		172		52
	Headquarters and Other^(b)		11		(155)		48		(203)		68
	Eliminations^(c)		(69)		1		1		-		-
NBCUniversal			5,504		982		320		662		156
Corporate and Other			130		(90)		16		(106)		7
Eliminations^(c)			(320)		11		(4)		15		-
Comcast Consolidated		$	15,211	$	5,004	$	1,925	$	3,079	$	1,287

		Six Months Ended June 30, 2013
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	20,684	$	8,554	$	3,231	$	5,323	$	2,334
NBCUniversal
	Cable Networks		4,638		1,719		366		1,353		48
	Broadcast Television		3,249		171		51		120		17
	Filmed Entertainment		2,604		102		7		95		3
	Theme Parks		1,008		404		145		259		285
	Headquarters and Other^(b)		18		(249)		124		(373)		170
	Eliminations^(c)		(182)		(3)		-		(3)		-
NBCUniversal			11,335		2,144		693		1,451		523
Corporate and Other			298		(202)		32		(234)		10
Eliminations^(c)			(737)		(37)		1		(38)		-
Comcast Consolidated		$	31,580	$	10,459	$	3,957	$	6,502	$	2,867

		Six Months Ended June 30, 2012
(in millions)			Revenue^(d)		Operating Income (Loss) Before Depreciation and Amortization^(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
Cable Communications^(a)		$	19,496	$	8,056	$	3,195	$	4,861	$	2,180
NBCUniversal
	Cable Networks		4,368		1,599		358		1,241		31
	Broadcast Television		3,413		180		45		135		19
	Filmed Entertainment		2,423		(77)		8		(85)		4
	Theme Parks		951		392		125		267		99
	Headquarters and Other^(b)		23		(301)		96		(397)		114
	Eliminations^(c)		(202)		2		-		2		-
NBCUniversal			10,976		1,795		632		1,163		267
Corporate and Other			304		(154)		30		(184)		14
Eliminations^(c)			(687)		(5)		(2)		(3)		-
Comcast Consolidated		$	30,089	$	9,692	$	3,855	$	5,837	$	2,461

Cable Segment Revenue Sources

		Three Months Ended				Six Months Ended
		June 30				June 30
		2013		2012		2013		2012
Residential:
	Video	49.4	%	50.9	%	49.7	%	51.1	%
	High-speed Internet	24.5	%	24.0	%	24.6	%	24.1	%
	Voice	8.7	%	9.0	%	8.8	%	9.1	%
Business services		7.5	%	6.3	%	7.4	%	6.2	%
Advertising		5.3	%	5.6	%	5.1	%	5.3	%
Other		4.6	%	4.2	%	4.4	%	4.2	%
Total		100	%	100	%	100	%	100	%

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Condensed Consolidating Financial Information (Tables)

6 Months Ended

Jun. 30, 2013

Condensed Consolidating Financial Information [Abstract]

Schedule of Condensed Consolidating Balance Sheets

Condensed Consolidating Balance Sheet
June 30, 2013

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Assets
	Cash and cash equivalents	$	-	$	-	$	-	$	-	$	351	$	1,038	$	-	$	1,389
	Investments		-		-		-		-		-		3,765		-		3,765
	Receivables, net		-		-		-		-		-		5,507		-		5,507
	Programming rights		-		-		-		-		-		859		-		859
	Other current assets		237		-		2		2		58		916		-		1,215
Total current assets			237		-		2		2		409		12,085		-		12,735
Film and television costs			-		-		-		-		-		4,340		-		4,340
Investments			8		-		-		-		381		4,910		-		5,299
Investments in and amounts due from subsidiaries eliminated upon consolidation			77,490		93,560		98,253		52,060		40,426		80,780		(442,569)		-
Property and equipment, net			229		-		-		-		-		28,026		-		28,255
Franchise rights			-		-		-		-		-		59,364		-		59,364
Goodwill			-		-		-		-		-		27,075		-		27,075
Other intangible assets, net			10		-		-		-		-		17,430		-		17,440
Other noncurrent assets, net			1,023		145		-		-		108		1,911		(876)		2,311
Total assets		$	78,997	$	93,705	$	98,255	$	52,062	$	41,324	$	235,921	$	(443,445)	$	156,819

Liabilities and Equity
	Accounts payable and accrued expenses related to trade creditors	$	11	$	-	$	-	$	-	$	-	$	6,066	$	-	$	6,077
	Accrued participations and residuals		-		-		-		-		-		1,625		-		1,625
	Accrued expenses and other current liabilities		1,421		266		162		54		276		6,186		-		8,365
	Current portion of long-term debt		1,371		-		-		239		904		21		-		2,535
Total current liabilities			2,803		266		162		293		1,180		13,898		-		18,602
Long-term debt, less current portion			25,096		113		1,827		1,509		10,225		5,344		-		44,114
Deferred income taxes			-		769		-		-		76		31,193		(735)		31,303
Other noncurrent liabilities			2,007		-		-		-		990		9,605		(141)		12,461
Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		853		-		853
Equity:
	Common stock		31		-		-		-		-		-		-		31
	Other shareholders’ equity		49,060		92,557		96,266		50,260		28,853		174,633		(442,569)		49,060
Total Comcast Corporation
	shareholders’ equity		49,091		92,557		96,266		50,260		28,853		174,633		(442,569)		49,091
Noncontrolling interests			-		-		-		-		-		395		-		395
Total equity			49,091		92,557		96,266		50,260		28,853		175,028		(442,569)		49,486
Total liabilities and equity		$	78,997	$	93,705	$	98,255	$	52,062	$	41,324	$	235,921	$	(443,445)	$	156,819

Condensed Consolidating Balance Sheet
December 31, 2012

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Assets
	Cash and cash equivalents	$	-	$	-	$	-	$	-	$	5,129	$	5,822	$	-	$	10,951
	Investments		-		-		-		-		-		1,464		-		1,464
	Receivables, net		-		-		-		-		3		5,518		-		5,521
	Programming rights		-		-		-		-		-		909		-		909
	Other current assets		233		-		14		4		51		844		-		1,146
Total current assets			233		-		14		4		5,183		14,557		-		19,991
Film and television costs			-		-		-		-		-		5,054		-		5,054
Investments			-		-		-		-		529		5,796		-		6,325
Investments in and amounts due from subsidiaries eliminated upon consolidation			74,227		87,630		96,853		50,242		38,464		73,298		(420,714)		-
Property and equipment, net			242		-		-		-		-		26,990		-		27,232
Franchise rights			-		-		-		-		-		59,364		-		59,364
Goodwill			-		-		-		-		-		26,985		-		26,985
Other intangible assets, net			12		-		-		-		-		17,828		-		17,840
Other noncurrent assets, net			1,130		147		1		-		152		1,650		(900)		2,180
Total assets		$	75,844	$	87,777	$	96,868	$	50,246	$	44,328	$	231,522	$	(421,614)	$	164,971

Liabilities and Equity
	Accounts payable and accrued expenses related to trade creditors	$	8	$	-	$	-	$	-	$	-	$	6,198	$	-	$	6,206
	Accrued participations and residuals		-		-		-		-		-		1,350		-		1,350
	Accrued expenses and other current liabilities		1,290		275		210		54		263		4,690		-		6,782
	Current portion of long-term debt		-		-		2,105		241		7		23		-		2,376
Total current liabilities			1,298		275		2,315		295		270		12,261		-		16,714
Long-term debt, less current portion			23,306		113		1,827		1,512		11,219		105		-		38,082
Deferred income taxes			-		754		-		-		78		30,035		(757)		30,110
Other noncurrent liabilities			1,884		-		-		-		926		10,604		(143)		13,271
Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		16,998		-		16,998
Equity:
	Common stock		31		-		-		-		-		-		-		31
	Other shareholders’ equity		49,325		86,635		92,726		48,439		31,835		161,079		(420,714)		49,325
Total Comcast Corporation shareholders’ equity			49,356		86,635		92,726		48,439		31,835		161,079		(420,714)		49,356
Noncontrolling interests			-		-		-		-		-		440		-		440
Total equity			49,356		86,635		92,726		48,439		31,835		161,519		(420,714)		49,796
Total liabilities and equity		$	75,844	$	87,777	$	96,868	$	50,246	$	44,328	$	231,522	$	(421,614)	$	164,971

Schedule of Condensed Consolidating Statement of Income

Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2013

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	16,270	$	-	$	16,270
	Management fee revenue		225		-		219		137		-		-		(581)		-
			225		-		219		137		-		16,270		(581)		16,270
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,968		-		4,968
	Other operating and administrative		101		-		219		137		205		4,489		(581)		4,570
	Advertising, marketing and promotion		-		-		-		-		-		1,307		-		1,307
	Depreciation		8		-		-		-		-		1,575		-		1,583
	Amortization		2		-		-		-		-		405		-		407
			111		-		219		137		205		12,744		(581)		12,835
Operating income (loss)			114		-		-		-		(205)		3,526		-		3,435
Other Income (Expense):
	Interest expense		(383)		(2)		(46)		(33)		(123)		(49)		-		(636)
	Investment income (loss), net		1		6		-		-		5		1		-		13
	Equity in net income
	(losses) of investees, net		1,910		1,909		1,835		1,349		951		646		(8,577)		23
	Other income (expense), net		(1)		-		2		-		-		(44)		-		(43)
			1,527		1,913		1,791		1,316		833		554		(8,577)		(643)
Income (loss) before income taxes			1,641		1,913		1,791		1,316		628		4,080		(8,577)		2,792
Income tax (expense) benefit			93		(1)		16		12		(5)		(1,163)		-		(1,048)
Net income (loss)			1,734		1,912		1,807		1,328		623		2,917		(8,577)		1,744
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(10)		-		(10)
Net income (loss) attributable
	to Comcast Corporation	$	1,734	$	1,912	$	1,807	$	1,328	$	623	$	2,907	$	(8,577)	$	1,734
Comprehensive income (loss)
	attributable to Comcast Corporation	$	1,822	$	1,905	$	1,808	$	1,328	$	599	$	3,007	$	(8,647)	$	1,822

Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2012

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	15,211	$	-	$	15,211
	Management fee revenue		210		-		205		127		-		-		(542)		-
			210		-		205		127		-		15,211		(542)		15,211
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,551		-		4,551
	Other operating and administrative		99		-		205		127		222		4,254		(542)		4,365
	Advertising, marketing and promotion		-		-		-		-		-		1,291		-		1,291
	Depreciation		8		-		-		-		-		1,508		-		1,516
	Amortization		1		-		-		-		-		408		-		409
			108		-		205		127		222		12,012		(542)		12,132
Operating income (loss)			102		-		-		-		(222)		3,199		-		3,079
Other Income (Expense):
	Interest expense		(354)		(8)		(83)		(33)		(105)		(42)		-		(625)
	Investment income (loss), net		2		1		-		-		-		5		-		8
	Equity in net income (losses) of
	investees, net		1,511		1,620		1,679		1,326		841		542		(7,490)		29
	Other income (expense), net		-		-		-		-		(12)		(35)		-		(47)
			1,159		1,613		1,596		1,293		724		470		(7,490)		(635)
Income (loss) before income taxes			1,261		1,613		1,596		1,293		502		3,669		(7,490)		2,444
Income tax (expense) benefit			87		2		29		11		11		(951)		-		(811)
Net income (loss)			1,348		1,615		1,625		1,304		513		2,718		(7,490)		1,633
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(285)		-		(285)
Net (income) loss
	attributable to Comcast Corporation	$	1,348	$	1,615	$	1,625	$	1,304	$	513	$	2,433	$	(7,490)	$	1,348
Comprehensive
	income (loss) attributable to Comcast Corporation	$	1,326	$	1,615	$	1,627	$	1,304	$	495	$	2,447	$	(7,488)	$	1,326

Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2013

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	31,580	$	-	$	31,580
	Management fee revenue		443		-		431		270		-		-		(1,144)		-
			443		-		431		270		-		31,580		(1,144)		31,580
Costs and Expenses:
	Programming and production		-		-		-		-		-		9,631		-		9,631
	Other operating and administrative		199		-		431		270		430		8,850		(1,144)		9,036
	Advertising, marketing and promotion		-		-		-		-		-		2,454		-		2,454
	Depreciation		15		-		-		-		-		3,134		-		3,149
	Amortization		3		-		-		-		-		805		-		808
			217		-		431		270		430		24,874		(1,144)		25,078
Operating income (loss)			226		-		-		-		(430)		6,706		-		6,502
Other Income (Expense):
	Interest expense		(759)		(5)		(124)		(66)		(243)		(92)		-		(1,289)
	Investment income (loss), net		2		3		-		-		1		79		-		85
	Equity in net income
	(losses) of investees, net		3,518		3,651		3,598		2,611		1,660		1,012		(16,016)		34
	Other income (expense), net		(2)		-		2		-		-		30		-		30
			2,759		3,649		3,476		2,545		1,418		1,029		(16,016)		(1,140)
Income (loss) before income taxes			2,985		3,649		3,476		2,545		988		7,735		(16,016)		5,362
Income tax (expense) benefit			186		1		43		23		(10)		(2,216)		-		(1,973)
Net income (loss)			3,171		3,650		3,519		2,568		978		5,519		(16,016)		3,389
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(218)		-		(218)
Net income (loss) attributable
	to Comcast Corporation	$	3,171	$	3,650	$	3,519	$	2,568	$	978	$	5,301	$	(16,016)	$	3,171
Comprehensive income (loss)
	attributable to Comcast Corporation	$	3,259	$	3,643	$	3,522	$	2,568	$	932	$	5,414	$	(16,079)	$	3,259

Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2012

(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	30,089	$	-	$	30,089
	Management fee revenue		414		-		405		252		-		-		(1,071)		-
			414		-		405		252		-		30,089		(1,071)		30,089
Costs and Expenses:
	Programming and production		-		-		-		-		-		9,287		-		9,287
	Other operating and administrative		191		-		405		252		475		8,358		(1,071)		8,610
	Advertising, marketing and promotion		-		-		-		-		-		2,500		-		2,500
	Depreciation		15		-		-		-		-		3,030		-		3,045
	Amortization		2		-		-		-		-		808		-		810
			208		-		405		252		475		23,983		(1,071)		24,252
Operating income (loss)			206		-		-		-		(475)		6,106		-		5,837
Other Income (Expense):
	Interest expense		(721)		(16)		(165)		(69)		(207)		(87)		-		(1,265)
	Investment income (loss), net		3		1		-		-		-		96		-		100
	Equity in net income
	(losses) of investees, net		2,905		3,124		3,222		2,375		1,584		930		(14,108)		32
	Other income (expense), net		-		-		-		-		(13)		(50)		-		(63)
			2,187		3,109		3,057		2,306		1,364		889		(14,108)		(1,196)
Income (loss) before income taxes			2,393		3,109		3,057		2,306		889		6,995		(14,108)		4,641
Income tax (expense) benefit			179		5		58		24		9		(1,836)		-		(1,561)
Net income (loss)			2,572		3,114		3,115		2,330		898		5,159		(14,108)		3,080
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		(508)		-		(508)
Net income (loss) attributable
	to Comcast Corporation	$	2,572	$	3,114	$	3,115	$	2,330	$	898	$	4,651	$	(14,108)	$	2,572
Comprehensive income (loss)
	attributable to Comcast Corporation	$	2,554	$	3,114	$	3,119	$	2,330	$	881	$	4,663	$	(14,107)	$	2,554

Schedule of Condensed Consolidating Statement of Cash Flows

Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2013
(in millions)		Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities	$	(181)	$	(8)	$	(120)	$	(47)	$	(582)	$	8,623	$	-	$	7,685
Investing Activities:
Net transactions with affiliates		(1,301)		8		2,217		47		(984)		13		-		-
Capital expenditures		(2)		-		-		-		-		(2,865)		-		(2,867)
Cash paid for intangible assets		(1)		-		-		-		-		(443)		-		(444)
Acquisition of 30 Rockefeller Plaza properties		-		-		-		-		-		(1,311)		-		(1,311)
Proceeds from sales of businesses and investments		-		-		-		-		-		91		-		91
Return of capital from investees		-		-		-		-		128		18		-		146
Purchases of investments		(8)		-		-		-		(2)		(631)		-		(641)
Other		-		-		-		-		(10)		76		-		66
Net cash provided by (used in) investing activities		(1,312)		8		2,217		47		(868)		(5,052)		-		(4,960)
Financing Activities:
Proceeds from (repayments of) short-term borrowings, net		350		-		-		-		-		(2)		-		348
Proceeds from borrowings		2,933		-		-		-		-		-		-		2,933
Repurchases and repayments of debt		-		-		(2,097)		-		(88)		(10)		-		(2,195)
Repurchases and retirements of common stock		(1,000)		-		-		-		-		-		-		(1,000)
Dividends paid		(942)		-		-		-		-		-		-		(942)
Issuances of common stock		24		-		-		-		-		-		-		24
Purchase of NBCUniversal noncontrolling common equity interest		-		-		-		-		(3,200)		(7,561)		-		(10,761)
Distributions (to) from noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		(116)		-		(116)
Settlement of Station Venture liability										-		(602)				(602)
Other		128		-		-		-		(40)		(64)		-		24
Net cash provided by (used in) financing activities		1,493		-		(2,097)		-		(3,328)		(8,355)		-		(12,287)
Increase (decrease) in cash and cash equivalents		-		-		-		-		(4,778)		(4,784)		-		(9,562)
Cash and cash equivalents, beginning of period		-		-		-		-		5,129		5,822		-		10,951
Cash and cash equivalents, end of period	$	-	$	-	$	-	$	-	$	351	$	1,038	$	-	$	1,389

Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2012
(in millions)		Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities	$	(194)	$	6	$	(100)	$	(71)	$	(739)	$	8,913	$	-	$	7,815
Investing Activities:
Net transactions with affiliates		3,317		(6)		100		624		1,708		(5,743)		-		-
Capital expenditures		(4)		-		-		-		-		(2,457)		-		(2,461)
Cash paid for intangible assets		(4)		-		-		-		-		(410)		-		(414)
Proceeds from sales of businesses and investments		-		-		-		-		-		64		-		64
Return of capital from investees		-		-		-		-		-		7		-		7
Purchases of investments		-		-		-		-		(3)		(105)		-		(108)
Other		-		-		-		-		(12)		95		-		83
Net cash provided by (used in) investing activities		3,309		(6)		100		624		1,693		(8,549)		-		(2,829)
Financing Activities:
Proceeds from (repayments of) short-term borrowings, net		(1)		-		-		-		(550)		(3)		-		(554)
Repurchases and repayments of debt		(1,125)		-		-		(553)		-		(14)		-		(1,692)
Repurchases and retirements of common stock		(1,500)		-		-		-		-		-		-		(1,500)
Dividends paid		(741)		-		-		-		-		-		-		(741)
Issuances of common stock		184		-		-		-		-		-		-		184
Distributions (to) from noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		(233)		-		(233)
Other		68		-		-		-		-		(37)		-		31
Net cash provided by (used in) financing activities		(3,115)		-		-		(553)		(550)		(287)		-		(4,505)
Increase (decrease) in cash and cash equivalents		-		-		-		-		404		77		-		481
Cash and cash equivalents, beginning of period		-		-		-		-		238		1,382		-		1,620
Cash and cash equivalents, end of period	$	-	$	-	$	-	$	-	$	642	$	1,459	$	-	$	2,101

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share
Excluded shares from diluted EPS because their inclusion would have an antidilutive effect	18	44	10	35
Net income attributable to Comcast Corporation	$ 1,734	$ 1,348	$ 3,171	$ 2,572
Basic shares attributable to Comcast Corporation shareholders	2,631	2,687	2,633	2,697
Assumed exercise or issuance of shares relating to stock plans	35	30	39	36
Diluted shares attributable to Comcast Corporation shareholders	2,666	2,717	2,672	2,733
Basic earnings per common share attributable to Comcast Corporation shareholders	$ 0.66	$ 0.50	$ 1.20	$ 0.95
Diluted earnings per common share attributable to Comcast Corporation shareholders	$ 0.65	$ 0.50	$ 1.19	$ 0.94

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.21)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 18
-Article 7

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 36, 37, 38
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 20
-Article 5

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 21
-Article 9

+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 230
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-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.7-04.22)
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e565-108580

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 15
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 87-21
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 19
-Article 5

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
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-Paragraph 4
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Significant Transactions (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Mar. 19, 2013
Significant Transactions [Line Items]
GE ownership percentage		49.00%
Purchase of NBCUniversal noncontrolling interest	$ 16,700
Payments related to acquisition of buildings	$ 1,400
Preferred stock dividend rate percentage	5.25%
Deferred tax liabilities recognized associated with the redemption transaction	$ 1,500
Cash On Hand
Significant Transactions [Line Items]
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	11,400
NBCUniversal Enterprise Senior Unsecured Debt Securities
Significant Transactions [Line Items]
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	4,000
Commercial Paper Program
Significant Transactions [Line Items]
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	750
NBCUniversal Enterprise Credit Facility
Significant Transactions [Line Items]
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	1,250
NBCUniversal Enterprise Preferred Stock
Significant Transactions [Line Items]
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	$ 725

Film and Television Costs (Film and Television Costs)(Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Film And Television Costs [Line Items]
Total film costs	$ 2,091	$ 2,619
Total television costs	1,400	1,458
Programming rights, less amortization	1,708	1,886
Total film costs, television costs and programming rights	5,199	5,963
Less: Current portion of programming rights	859	909
Film and television costs	4,340	5,054
Film Costs [Member]
Film And Television Costs [Line Items]
Released, less amortization	1,442	1,472
Completed, not released	260	99
In production and in development	389	1,048
Television Costs [Member]
Film And Television Costs [Line Items]
Released, less amortization	1,130	1,124
In production and in development	$ 270	$ 334

Investments (Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Fair value method	$ 5,809	$ 4,493
Equity method	1,082	1,164
Cost method	2,173	2,132
Total Investments	9,064	7,789
Less: Current investments	3,765	1,464
Noncurrent investments	5,299	6,325
Other Equity Method Investments [Member]
Equity method	754	693
Air Touch [Member]
Cost method	1,545	1,538
Other Cost Method Investment [Member]
Cost method	628	594
The Weather Channel [Member]
Equity method	$ 328	$ 471

Investments (Investment Income (Loss), Net) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Investments
Gains on sales and exchanges of investments, net	$ 3	$ 20	$ 38	$ 27
Investment impairment losses	(4)	(9)	(13)	(21)
Unrealized gains (losses) on securities underlying prepaid forward sale agreements	247	(28)	852	488
Mark to market adjustments on derivative component of prepaid forward sale agreements and indexed debt instruments	(239)	20	(841)	(450)
Interest and dividend income	26	28	56	57
Other, net	(20)	(23)	(7)	(1)
Investment income (loss), net	$ 13	$ 8	$ 85	$ 100

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Paragraph 28
-Subparagraph (b)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Staff Position (FSP)
-Number FAS115-2/124-2
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investments (Fair Value Method Investments) (Details) - USD ($) shares in Millions, $ in Millions	Jul. 09, 2013	Jun. 30, 2013	Dec. 31, 2012
Fair value equity securities held		$ 4,787	$ 4,143
Obligations under prepaid forward sale agreements		1,142	1,248
Derivative component of prepaid forward sale agreements		3,133	2,302
Total liabilities associated with prepaid forward sale agreements		4,275	3,550
Prepaid forward sale obligations fair value		4,300
Fair value method		5,809	$ 4,493
Clearwire Corp [Member]
Unrealized gains in accumulated other comprehensive income (loss), net		$ 443
Proceeds from sale of available-for-sale securities	$ 443
Shares held in an entity		89

Investments (Equity Method Investments) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Return of capital from investees	$ 146	$ 7
The Weather Channel [Member]
Total distribution from investee	152
Return of capital from investees	$ 128

Investments (Cost Method Investments) (Details) $ in Billions	Jun. 30, 2013 USD ($)
Air Touch [Member]
Fair value of AirTouch preferred stock and the associated liability related to redeemable preferred shares	$ 1.7

Goodwill Rollforward (Details) $ in Millions	6 Months Ended
Goodwill Rollforward (Details) $ in Millions	Jun. 30, 2013 USD ($)
Goodwill beginning balance	$ 26,985
Acquisitions	17
Adjustments	73
Goodwill ending balance	27,075
Cable Communications [Member]
Goodwill beginning balance	12,206
Goodwill ending balance	12,206
Cable Networks [Member]
Goodwill beginning balance	13,026
Acquisitions	17
Adjustments	67
Goodwill ending balance	13,110
Broadcast Television [Member]
Goodwill beginning balance	761
Adjustments	5
Goodwill ending balance	766
Filmed Entertainment [Member]
Goodwill beginning balance	1
Goodwill ending balance	1
Theme Parks [Member]
Goodwill beginning balance	982
Goodwill ending balance	982
Corporate and Other [Member]
Goodwill beginning balance	9
Adjustments	1
Goodwill ending balance	$ 10

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
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-Name Statement of Financial Accounting Standard (FAS)
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
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-Subparagraph l
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Commercial paper	$ 350
Revolving credit facilities	1,250
Total debt	46,649	$ 40,458
Less: current portion	2,535	2,376
Long-term debt	$ 44,114	38,082
Weighted average interest rate	4.90%
Credit facility interest rate	1.273%
Commercial Paper Program
Weighted average interest rate	0.33%
NBCUniversal Enterprise Credit Facility [Member]
Credit facility interest rate	1.273%
Senior notes with maturities of 5 years or less [Member]
Senior notes	$ 15,358	12,991
Weighted average interest rate	4.758%
Senior notes with maturities between 6 and 10 years [Member]
Senior notes	$ 11,534	10,334
Weighted average interest rate	4.558%
Senior notes with maturities greater than 10 years [Member]
Senior notes	$ 17,923	16,801
Weighted average interest rate	5.999%
Other Including Capital Lease Obligations [Member]
Other, including capital lease obligations	$ 234	$ 332

Long-Term Debt (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Mar. 19, 2013
Long-term Debt, Fair Value	$ 51,600
Revolving credit facilities	1,250
Amounts available under consolidated revolving credit facilities	$ 5,700
Credit facility interest rate	1.273%
Proceeds from commercial paper issued, net of repayments	$ 350
NBCUniversal Enterprise Senior Unsecured Debt Securities
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	4,000
Commercial Paper Program
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	750
NBCUniversal Enterprise Credit Facility
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	1,250
Senior 1.662% Notes Due 2018 [Member]
Principal amount	$ 1,100
Interest rate	1.662%
Debt Instrument, Maturity Date, Description	2018
Senior 1.974% Notes Due 2019 [Member]
Principal amount	$ 1,500
Interest rate	1.974%
Debt Instrument, Maturity Date, Description	2019
Floating Rate Senior Notes Due 2018 [Member]
Principal amount	$ 700
Debt Instrument, Maturity Date, Description	2018
Spread above LIBOR offered rate	0.685%
Floating Rate Senior Notes Due 2016 [Member]
Principal amount	$ 700
Debt Instrument, Maturity Date, Description	2016
Spread above LIBOR offered rate	0.537%
Senior 2.850% Notes Due 2023 [Member]
Principal amount	$ 750
Interest rate	2.85%
Debt Instrument, Maturity Date, Description	2023
Senior 4.250% Notes Due 2033 [Member]
Principal amount	$ 1,700
Interest rate	4.25%
Debt Instrument, Maturity Date, Description	2033
Senior 4.500% Notes Due 2043 [Member]
Principal amount	$ 500
Interest rate	4.50%
Debt Instrument, Maturity Date, Description	2043
Prior NBCUniversal Credit Facility [Member]
Credit facility borrowing capacity		$ 1,500
NBCUniversal Enterprise Credit Facility [Member]
Debt Instrument, Maturity Date, Description	March 2018
Credit facility borrowing capacity	$ 1,350
Amounts available under consolidated revolving credit facilities	$ 100
Credit facility interest rate	1.273%

Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Trading securities	$ 5,092	$ 4,027
Available-for-sale securities	717	464
Interest rate swap agreements	140	210
Other [assets]	18	38
Fair value, assets measured on recurring basis, total	5,967	4,739
Derivative component of prepaid forward sale agreements and indexed debt instruments	3,133	2,305
Contractual obligations	1,105	1,055
Contingent consideration	689	587
Other [liabilities]	46	14
Fair value liabilities measured on recurring basis	4,973	$ 3,961
Fair Value, Inputs, Level 1 [Member]
Trading securities	5,092
Available-for-sale securities	596
Fair value, assets measured on recurring basis, total	5,688
Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	103
Interest rate swap agreements	140
Other [assets]	18
Fair value, assets measured on recurring basis, total	261
Derivative component of prepaid forward sale agreements and indexed debt instruments	3,133
Other [liabilities]	46
Fair value liabilities measured on recurring basis	3,179
Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities	18
Fair value, assets measured on recurring basis, total	18
Contractual obligations	1,105
Contingent consideration	689
Fair value liabilities measured on recurring basis	$ 1,794

Fair Value Disclosure Rollforward (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Discount rate used to determine fair value, minimum	5.00%
Discount rate used to determine fair value, maximum	14.00%
Nonrecurring fair value adjustments	$ 113	$ 64
Contractual Obligations [Member]
Beginning balance	1,055
Fair value adjustments	91
Payments	(41)
Ending balance	1,105
Contingent Consideration [Member]
Beginning balance	587
Fair value adjustments	16
Payments	(85)
Redemption transaction	171
Ending balance	689
Fair Value Of Specific Contract Obligation [Member]
Ending balance	$ 383

Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Noncontrolling Interests (Details) - USD ($) $ in Millions	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Mar. 19, 2013
GE ownership percentage					49.00%
Net income attributable to Comcast Corporation	$ 1,734	$ 1,348	$ 3,171	$ 2,572
Changes in equity resulting from net income attributable to Comcast Corporation and transfers from (to) noncontrolling interests			1,688	2,574
Redemption Transaction [Member]
Increase (decrease) in Comcast Corporation additional paid-in capital resulting from the purchase of noncontrolling interest			(1,482)	0
Other Purchase [Member]
Increase (decrease) in Comcast Corporation additional paid-in capital resulting from the purchase of noncontrolling interest			$ (1)	$ 2

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Share-Based Compensation (Narrative) (Details) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2013 USD ($) $ / shares shares
Number of stock options granted \| shares	18.4
Number of restricted share units granted \| shares	5.2
Weighted average fair value of stock options granted \| $ / shares	$ 8.8
Fair value of restricted share units granted \| $ / shares	$ 37.85
Stock Options [Member]
Unrecognized pretax compensation expense on nonvested awards \| $	$ 384
Restricted Share Units [Member]
Unrecognized pretax compensation expense on nonvested awards \| $	$ 445

Share-Based Compensation (Recognized Share-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Allocated share-based compensation expense	$ 89	$ 82	$ 165	$ 151
Stock Options [Member]
Allocated share-based compensation expense	36	38	68	67
Restricted Share Units [Member]
Allocated share-based compensation expense	48	41	86	76
Employee Stock Purchase Plan [Member]
Allocated share-based compensation expense	$ 5	$ 3	$ 11	$ 8

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References + Details

Supplemental Financial Information (Receivables)(Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Supplemental Financial Information [Abstract]
Receivables, gross	$ 5,958	$ 6,026
Less: Allowance for returns and customer incentives	250	307
Less: Allowance for doubtful accounts	201	198
Receivables, net	$ 5,507	$ 5,521

Supplemental Financial Information (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Equity
Unrealized gains (losses) on marketable securities	$ 277		$ 22
Deferred gains (losses) on cash flow hedges	(54)		(125)
Unrecognized gains (losses) on employee benefit obligations	(107)		(59)
Cumulative translation adjustments	(39)		(8)
Accumulated other comprehensive income (loss), net of deferred taxes	$ 77	$ 15	$ (170)

- Definition

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References + Details

- Definition

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
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-Number 130
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Principles Board Opinion (APB)
-Number 12
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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+ Details

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 220
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-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 31
-Article 5

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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Supplemental Financial Information (Net Cash Provided by Operating Activities)(Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 1,744	$ 1,633	$ 3,389	$ 3,080
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,990	1,925	3,957	3,855
Amortization of film and television costs			4,080	4,156
Share-based compensation			213	189
Noncash interest expense (income), net			81	105
Equity in net (income) losses of investees, net	$ (23)	$ (29)	(34)	(32)
Cash received from investees			72	142
Net (gain) loss on investment activity and other			(91)	(27)
Deferred income taxes			87	41
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Change in current and noncurrent receivables, net			58	(16)
Change in film and television costs			(3,330)	(4,177)
Change in accounts payable and accrued expenses related to trade creditors			(87)	111
Change in other operating assets and liabilities			(710)	388
Net cash provided by (used in) operating activities			$ 7,685	$ 7,815

Supplemental Financial Information (Cash Payments for Interest and Income Taxes)(Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Supplemental Financial Information [Abstract]
Interest	$ 515	$ 544	$ 1,132	$ 1,158
Income taxes	$ 1,761	$ 904	$ 2,222	$ 1,022

Supplemental Financial Information (Noncash Investing and Financing Activities)(Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2013	Mar. 19, 2013
GE ownership percentage		49.00%
Purchase of NBCUniversal noncontrolling interest	$ 16,700
Total noncash consideration transferred related to the Redemption Transaction	6,000
Dividends payable, amount	$ 512
Dividends payable, amount per share	$ 0.195
Capital expenditures incurred but not yet paid	$ 573
NBCUniversal Enterprise Credit Facility
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	1,250
NBCUniversal Enterprise Senior Unsecured Debt Securities
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	4,000
NBCUniversal Enterprise Preferred Stock
Total consideration transferred related to the Redemption Transaction and purchase of certain properties	$ 725

Receivables Monetization (Narrative)(Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Receivables Monetization [Abstract]
Monetization programs payable	$ 730	$ 882

Receivables Monetization (Effect on Income From Receivables Monetization and Cash Flows on Transfers)(Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Receivables Monetization [Abstract]
Net cash proceeds (payments) on transfers	$ (178)	$ (223)

Receivables Monetization (Receivables Monetized and Deferred Consideration)(Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012
Receivables Monetization [Abstract]
Monetized receivables sold	$ 749	$ 791
Deferred consideration	$ 252	$ 274

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2013	Feb. 12, 2013
Collateral liability for unconsolidated subsidiary debt		$ 482
Settlement Of Station Venture Liability	$ 602
Station Venture Senior Secured Note Due In 2023 [Member]
Debt of unconsolidated variable interest entity	$ 816
Maturity year	2023

Financial Data by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue	$ 16,270	$ 15,211	$ 31,580	$ 30,089
Operating income (loss) before depreciation and amortization	5,425	5,004	10,459	9,692
Depreciation and amortization	1,990	1,925	3,957	3,855
Operating income (loss)	3,435	3,079	6,502	5,837
Capital expenditures	$ 1,506	$ 1,287	$ 2,867	$ 2,461
Cable segment revenue types as percentage of total cable revenue	100.00%	100.00%	100.00%	100.00%
Cable Communications [Member]
Revenue	$ 10,467	$ 9,897	$ 20,684	$ 19,496
Operating income (loss) before depreciation and amortization	4,335	4,101	8,554	8,056
Depreciation and amortization	1,623	1,593	3,231	3,195
Operating income (loss)	2,712	2,508	5,323	4,861
Capital expenditures	1,240	1,124	2,334	2,180
Cable Networks [Member]
Revenue	2,413	2,240	4,638	4,368
Operating income (loss) before depreciation and amortization	860	790	1,719	1,599
Depreciation and amortization	182	182	366	358
Operating income (loss)	678	608	1,353	1,241
Capital expenditures	24	22	48	31
Broadcast Television [Member]
Revenue	1,732	1,552	3,249	3,413
Operating income (loss) before depreciation and amortization	206	194	171	180
Depreciation and amortization	26	22	51	45
Operating income (loss)	180	172	120	135
Capital expenditures	9	11	17	19
Filmed Entertainment [Member]
Revenue	1,388	1,231	2,604	2,423
Operating income (loss) before depreciation and amortization	33	(83)	102	(77)
Depreciation and amortization	3	4	7	8
Operating income (loss)	30	(87)	95	(85)
Capital expenditures	1	3	3	4
Theme Parks [Member]
Revenue	546	539	1,008	951
Operating income (loss) before depreciation and amortization	231	235	404	392
Depreciation and amortization	73	63	145	125
Operating income (loss)	158	172	259	267
Capital expenditures	147	52	285	99
Headquarters And Other [Member]
Revenue	9	11	18	23
Operating income (loss) before depreciation and amortization	(137)	(155)	(249)	(301)
Depreciation and amortization	65	48	124	96
Operating income (loss)	(202)	(203)	(373)	(397)
Capital expenditures	79	68	170	114
NBCUniversal Eliminations [Member]
Revenue	(93)	(69)	(182)	(202)
Operating income (loss) before depreciation and amortization	(2)	1	(3)	2
Depreciation and amortization	0	1	0	0
Operating income (loss)	(2)	0	(3)	2
Capital expenditures	0	0	0	0
NBCUniversal [Member]
Revenue	5,995	5,504	11,335	10,976
Operating income (loss) before depreciation and amortization	1,191	982	2,144	1,795
Depreciation and amortization	349	320	693	632
Operating income (loss)	842	662	1,451	1,163
Capital expenditures	260	156	523	267
Corporate and Other [Member]
Revenue	136	130	298	304
Operating income (loss) before depreciation and amortization	(119)	(90)	(202)	(154)
Depreciation and amortization	17	16	32	30
Operating income (loss)	(136)	(106)	(234)	(184)
Capital expenditures	6	7	10	14
Eliminations [Member]
Revenue	(328)	(320)	(737)	(687)
Operating income (loss) before depreciation and amortization	18	11	(37)	(5)
Depreciation and amortization	1	(4)	1	(2)
Operating income (loss)	17	15	(38)	(3)
Capital expenditures	$ 0	$ 0	$ 0	$ 0
Cable Communications Segment Revenue Percentage-Video [Member]
Cable segment revenue types as percentage of total cable revenue	49.40%	50.90%	49.70%	51.10%
Cable Communications Segment Revenue Percentage - High-speed Internet [Member]
Cable segment revenue types as percentage of total cable revenue	24.50%	24.00%	24.60%	24.10%
Cable Communications Segment Revenue Percentage- Phone [Member]
Cable segment revenue types as percentage of total cable revenue	8.70%	9.00%	8.80%	9.10%
Cable Communications Segment Revenue Percentage- Advertising [Member]
Cable segment revenue types as percentage of total cable revenue	5.30%	5.60%	5.10%	5.30%
Cable Communications Segment Revenue Percentage- Business Services [Member]
Cable segment revenue types as percentage of total cable revenue	7.50%	6.30%	7.40%	6.20%
Cable Communications Segment Revenue Percentage- Other [Member]
Cable segment revenue types as percentage of total cable revenue	4.60%	4.20%	4.40%	4.20%
Cable Communications Segment Revenue Percentage- Franchise and other regulatory fees [Member]
Cable segment revenue types as percentage of total cable revenue	2.80%	2.80%	2.90%	2.80%

Condensed Consolidating Financial Information (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2013 USD ($)
Holding company ownership in subsidiaries	100.00%
Comcast Holdings' ZONES due October 2029 [Member]
Principal amount of debt securities subject to guarantee	$ 185
Comcast Holdings' ZONES due November 2029 [Member]
Principal amount of debt securities not subject to guarantee	62
Comcast And Comcast Cable Communications LLC [Member]
Credit facility borrowing capacity	6,250
NBCUniversal Enterprise [Member]
Credit facility borrowing capacity	1,350
Principal amount of debt securities subject to guarantee	$ 4,000

Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 1,389	$ 10,951	$ 2,101	$ 1,620
Investments [Current]	3,765	1,464
Receivables, net	5,507	5,521
Programming rights	859	909
Other current assets	1,215	1,146
Total current assets	12,735	19,991
Film and television costs	4,340	5,054
Investments	5,299	6,325
Property and equipment, net	28,255	27,232
Franchise rights	59,364	59,364
Goodwill	27,075	26,985
Other intangible assets, net	17,440	17,840
Other noncurrent assets, net	2,311	2,180
Total assets	156,819	164,971
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	6,077	6,206
Accrued participations and residuals	1,625	1,350
Accrued expenses and other current liabilities [condensed]	8,365	6,782
Current portion of long-term debt	2,535	2,376
Total current liabilities	18,602	16,714
Long-term debt, less current portion	44,114	38,082
Deferred income taxes	31,303	30,110
Other noncurrent liabilities	12,461	13,271
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	853	16,998
Equity:
Common stock	31	31
Other shareholders' equity	49,060	49,325
Total Comcast Corporation shareholders' equity	49,091	49,356
Noncontrolling interests	395	440
Total equity	49,486	49,796	48,179	47,655
Total liabilities and equity	156,819	164,971
Comcast [Member]
Assets
Other current assets	237	233
Total current assets	237	233
Investments	8
Investments in and amounts due from subsidiaries eliminated upon consolidation	77,490	74,227
Property and equipment, net	229	242
Other intangible assets, net	10	12
Other noncurrent assets, net	1,023	1,130
Total assets	78,997	75,844
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	11	8
Accrued expenses and other current liabilities [condensed]	1,421	1,290
Current portion of long-term debt	1,371
Total current liabilities	2,803	1,298
Long-term debt, less current portion	25,096	23,306
Other noncurrent liabilities	2,007	1,884
Equity:
Common stock	31	31
Other shareholders' equity	49,060	49,325
Total Comcast Corporation shareholders' equity	49,091	49,356
Total equity	49,091	49,356
Total liabilities and equity	78,997	75,844
Comcast Holdings [Member]
Assets
Investments in and amounts due from subsidiaries eliminated upon consolidation	93,560	87,630
Other noncurrent assets, net	145	147
Total assets	93,705	87,777
Liabilities and Equity
Accrued expenses and other current liabilities [condensed]	266	275
Total current liabilities	266	275
Long-term debt, less current portion	113	113
Deferred income taxes	769	754
Equity:
Other shareholders' equity	92,557	86,635
Total Comcast Corporation shareholders' equity	92,557	86,635
Total equity	92,557	86,635
Total liabilities and equity	93,705	87,777
CCCL Parent [Member]
Assets
Other current assets	2	14
Total current assets	2	14
Investments in and amounts due from subsidiaries eliminated upon consolidation	98,253	96,853
Other noncurrent assets, net		1
Total assets	98,255	96,868
Liabilities and Equity
Accrued expenses and other current liabilities [condensed]	162	210
Current portion of long-term debt		2,105
Total current liabilities	162	2,315
Long-term debt, less current portion	1,827	1,827
Equity:
Other shareholders' equity	96,266	92,726
Total Comcast Corporation shareholders' equity	96,266	92,726
Total equity	96,266	92,726
Total liabilities and equity	98,255	96,868
Combined CCHMO Parents [Member]
Assets
Other current assets	2	4
Total current assets	2	4
Investments in and amounts due from subsidiaries eliminated upon consolidation	52,060	50,242
Total assets	52,062	50,246
Liabilities and Equity
Accrued expenses and other current liabilities [condensed]	54	54
Current portion of long-term debt	239	241
Total current liabilities	293	295
Long-term debt, less current portion	1,509	1,512
Equity:
Other shareholders' equity	50,260	48,439
Total Comcast Corporation shareholders' equity	50,260	48,439
Total equity	50,260	48,439
Total liabilities and equity	52,062	50,246
NBCUniversal Media Parent [Member]
Assets
Cash and cash equivalents	351	5,129	642	238
Receivables, net		3
Other current assets	58	51
Total current assets	409	5,183
Investments	381	529
Investments in and amounts due from subsidiaries eliminated upon consolidation	40,426	38,464
Other noncurrent assets, net	108	152
Total assets	41,324	44,328
Liabilities and Equity
Accrued expenses and other current liabilities [condensed]	276	263
Current portion of long-term debt	904	7
Total current liabilities	1,180	270
Long-term debt, less current portion	10,225	11,219
Deferred income taxes	76	78
Other noncurrent liabilities	990	926
Equity:
Other shareholders' equity	28,853	31,835
Total Comcast Corporation shareholders' equity	28,853	31,835
Total equity	28,853	31,835
Total liabilities and equity	41,324	44,328
Comcast Non-Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	1,038	5,822	$ 1,459	$ 1,382
Investments [Current]	3,765	1,464
Receivables, net	5,507	5,518
Programming rights	859	909
Other current assets	916	844
Total current assets	12,085	14,557
Film and television costs	4,340	5,054
Investments	4,910	5,796
Investments in and amounts due from subsidiaries eliminated upon consolidation	80,780	73,298
Property and equipment, net	28,026	26,990
Franchise rights	59,364	59,364
Goodwill	27,075	26,985
Other intangible assets, net	17,430	17,828
Other noncurrent assets, net	1,911	1,650
Total assets	235,921	231,522
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	6,066	6,198
Accrued participations and residuals	1,625	1,350
Accrued expenses and other current liabilities [condensed]	6,186	4,690
Current portion of long-term debt	21	23
Total current liabilities	13,898	12,261
Long-term debt, less current portion	5,344	105
Deferred income taxes	31,193	30,035
Other noncurrent liabilities	9,605	10,604
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	853	16,998
Equity:
Other shareholders' equity	174,633	161,079
Total Comcast Corporation shareholders' equity	174,633	161,079
Noncontrolling interests	395	440
Total equity	175,028	161,519
Total liabilities and equity	235,921	231,522
Elimination and Consolidation Adjustments [Member]
Assets
Investments in and amounts due from subsidiaries eliminated upon consolidation	(442,569)	(420,714)
Other noncurrent assets, net	(876)	(900)
Total assets	(443,445)	(421,614)
Liabilities and Equity
Deferred income taxes	(735)	(757)
Other noncurrent liabilities	(141)	(143)
Equity:
Other shareholders' equity	(442,569)	(420,714)
Total Comcast Corporation shareholders' equity	(442,569)	(420,714)
Total equity	(442,569)	(420,714)
Total liabilities and equity	$ (443,445)	$ (421,614)

Condensed Consolidating Financial Information (Condensed Consolidating Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Service revenue	$ 16,270	$ 15,211	$ 31,580	$ 30,089
Revenue	16,270	15,211	31,580	30,089
Costs and Expenses:
Programming and production	4,968	4,551	9,631	9,287
Other operating and administrative	4,570	4,365	9,036	8,610
Advertising, marketing and promotion	1,307	1,291	2,454	2,500
Depreciation	1,583	1,516	3,149	3,045
Amortization	407	409	808	810
Costs and expenses, total	12,835	12,132	25,078	24,252
Operating income (loss)	3,435	3,079	6,502	5,837
Other Income (Expense):
Interest expense	(636)	(625)	(1,289)	(1,265)
Investment income (loss), net	13	8	85	100
Equity in net income (losses) of investees, net	23	29	34	32
Other income (expense), net	(43)	(47)	30	(63)
Nonoperating income (Expense), Total	(643)	(635)	(1,140)	(1,196)
Income (loss) before income taxes	2,792	2,444	5,362	4,641
Income tax (expense) benefit	(1,048)	(811)	(1,973)	(1,561)
Net income (loss)	1,744	1,633	3,389	3,080
Net (income) loss attributable to noncontrolling interests	(10)	(285)	(218)	(508)
Net income (loss) attributable to Comcast Corporation	1,734	1,348	3,171	2,572
Comprehensive income attributable to Comcast Corporation	1,822	1,326	3,259	2,554
Comcast [Member]
Management fee revenue	225	210	443	414
Revenue	225	210	443	414
Costs and Expenses:
Other operating and administrative	101	99	199	191
Depreciation	8	8	15	15
Amortization	2	1	3	2
Costs and expenses, total	111	108	217	208
Operating income (loss)	114	102	226	206
Other Income (Expense):
Interest expense	(383)	(354)	(759)	(721)
Investment income (loss), net	1	2	2	3
Equity in net income (losses) of investees, net	1,910	1,511	3,518	2,905
Other income (expense), net	(1)		(2)
Nonoperating income (Expense), Total	1,527	1,159	2,759	2,187
Income (loss) before income taxes	1,641	1,261	2,985	2,393
Income tax (expense) benefit	93	87	186	179
Net income (loss)	1,734	1,348	3,171	2,572
Net income (loss) attributable to Comcast Corporation	1,734	1,348	3,171	2,572
Comprehensive income attributable to Comcast Corporation	1,822	1,326	3,259	2,554
Comcast Holdings [Member]
Other Income (Expense):
Interest expense	(2)	(8)	(5)	(16)
Investment income (loss), net	6	1	3	1
Equity in net income (losses) of investees, net	1,909	1,620	3,651	3,124
Other income (expense), net			0
Nonoperating income (Expense), Total	1,913	1,613	3,649	3,109
Income (loss) before income taxes	1,913	1,613	3,649	3,109
Income tax (expense) benefit	(1)	2	1	5
Net income (loss)	1,912	1,615	3,650	3,114
Net income (loss) attributable to Comcast Corporation	1,912	1,615	3,650	3,114
Comprehensive income attributable to Comcast Corporation	1,905	1,615	3,643	3,114
CCCL Parent [Member]
Management fee revenue	219	205	431	405
Revenue	219	205	431	405
Costs and Expenses:
Other operating and administrative	219	205	431	405
Costs and expenses, total	219	205	431	405
Other Income (Expense):
Interest expense	(46)	(83)	(124)	(165)
Equity in net income (losses) of investees, net	1,835	1,679	3,598	3,222
Other income (expense), net	2		2
Nonoperating income (Expense), Total	1,791	1,596	3,476	3,057
Income (loss) before income taxes	1,791	1,596	3,476	3,057
Income tax (expense) benefit	16	29	43	58
Net income (loss)	1,807	1,625	3,519	3,115
Net income (loss) attributable to Comcast Corporation	1,807	1,625	3,519	3,115
Comprehensive income attributable to Comcast Corporation	1,808	1,627	3,522	3,119
Combined CCHMO Parents [Member]
Management fee revenue	137	127	270	252
Revenue	137	127	270	252
Costs and Expenses:
Other operating and administrative	137	127	270	252
Costs and expenses, total	137	127	270	252
Other Income (Expense):
Interest expense	(33)	(33)	(66)	(69)
Equity in net income (losses) of investees, net	1,349	1,326	2,611	2,375
Nonoperating income (Expense), Total	1,316	1,293	2,545	2,306
Income (loss) before income taxes	1,316	1,293	2,545	2,306
Income tax (expense) benefit	12	11	23	24
Net income (loss)	1,328	1,304	2,568	2,330
Net income (loss) attributable to Comcast Corporation	1,328	1,304	2,568	2,330
Comprehensive income attributable to Comcast Corporation	1,328	1,304	2,568	2,330
NBCUniversal Media Parent [Member]
Revenue		0
Costs and Expenses:
Other operating and administrative	205	222	430	475
Costs and expenses, total	205	222	430	475
Operating income (loss)	(205)	(222)	(430)	(475)
Other Income (Expense):
Interest expense	(123)	(105)	(243)	(207)
Investment income (loss), net	5		1
Equity in net income (losses) of investees, net	951	841	1,660	1,584
Other income (expense), net		(12)		(13)
Nonoperating income (Expense), Total	833	724	1,418	1,364
Income (loss) before income taxes	628	502	988	889
Income tax (expense) benefit	(5)	11	(10)	9
Net income (loss)	623	513	978	898
Net income (loss) attributable to Comcast Corporation	623	513	978	898
Comprehensive income attributable to Comcast Corporation	599	495	932	881
Comcast Non-Guarantor Subsidiaries [Member]
Service revenue	16,270	15,211	31,580	30,089
Revenue	16,270	15,211	31,580	30,089
Costs and Expenses:
Programming and production	4,968	4,551	9,631	9,287
Other operating and administrative	4,489	4,254	8,850	8,358
Advertising, marketing and promotion	1,307	1,291	2,454	2,500
Depreciation	1,575	1,508	3,134	3,030
Amortization	405	408	805	808
Costs and expenses, total	12,744	12,012	24,874	23,983
Operating income (loss)	3,526	3,199	6,706	6,106
Other Income (Expense):
Interest expense	(49)	(42)	(92)	(87)
Investment income (loss), net	1	5	79	96
Equity in net income (losses) of investees, net	646	542	1,012	930
Other income (expense), net	(44)	(35)	30	(50)
Nonoperating income (Expense), Total	554	470	1,029	889
Income (loss) before income taxes	4,080	3,669	7,735	6,995
Income tax (expense) benefit	(1,163)	(951)	(2,216)	(1,836)
Net income (loss)	2,917	2,718	5,519	5,159
Net (income) loss attributable to noncontrolling interests and redeemable subsidiary preferred stock	(10)	(285)	(218)	(508)
Net income (loss) attributable to Comcast Corporation	2,907	2,433	5,301	4,651
Comprehensive income attributable to Comcast Corporation	3,007	2,447	5,414	4,663
Elimination and Consolidation Adjustments [Member]
Management fee revenue	(581)	(542)	(1,144)	(1,071)
Revenue	(581)	(542)	(1,144)	(1,071)
Costs and Expenses:
Other operating and administrative	(581)	(542)	(1,144)	(1,071)
Costs and expenses, total	(581)	(542)	(1,144)	(1,071)
Other Income (Expense):
Equity in net income (losses) of investees, net	(8,577)	(7,490)	(16,016)	(14,108)
Nonoperating income (Expense), Total	(8,577)	(7,490)	(16,016)	(14,108)
Income (loss) before income taxes	(8,577)	(7,490)	(16,016)	(14,108)
Net income (loss)	(8,577)	(7,490)	(16,016)	(14,108)
Net income (loss) attributable to Comcast Corporation	(8,577)	(7,490)	(16,016)	(14,108)
Comprehensive income attributable to Comcast Corporation	$ (8,647)	$ (7,488)	$ (16,079)	$ (14,107)

Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net cash provided by (used in) operating activities			$ 7,685	$ 7,815
Investing Activities
Capital expenditures	$ (1,506)	$ (1,287)	(2,867)	(2,461)
Cash paid for intangible assets			(444)	(414)
Acquisition of 30 Rockefeller Plaza properties			(1,311)
Proceeds from sales of businesses and investments			91	64
Return of capital from investees			146	7
Purchases of investments			(641)	(108)
Other			66	83
Net cash provided by (used in) investing activities			(4,960)	(2,829)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net			348	(554)
Proceeds from borrowings			2,933
Repurchases and repayments of debt			(2,195)	(1,692)
Repurchases and retirements of common stock			(1,000)	(1,500)
Dividends paid			(942)	(741)
Issuances of common stock			24	184
Purchase of NBCUniversal noncontrolling common equity interest			(10,761)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock			(116)	(233)
Settlement of Station Venture liability			(602)
Other			24	31
Net cash provided by (used in) financing activities			(12,287)	(4,505)
Increase (decrease) in cash and cash equivalents			(9,562)	481
Cash and cash equivalents, beginning of period			10,951	1,620
Cash and cash equivalents, end of period	1,389	2,101	1,389	2,101
Comcast [Member]
Operating Activities
Net cash provided by (used in) operating activities			(181)	(194)
Investing Activities
Net transactions with affiliates			(1,301)	3,317
Capital expenditures			(2)	(4)
Cash paid for intangible assets			(1)	(4)
Purchases of investments			(8)
Net cash provided by (used in) investing activities			(1,312)	3,309
Financing Activities
Proceeds from (repayments of) short-term borrowings, net			350	(1)
Proceeds from borrowings			2,933
Repurchases and repayments of debt				(1,125)
Repurchases and retirements of common stock			(1,000)	(1,500)
Dividends paid			(942)	(741)
Issuances of common stock			24	184
Other			128	68
Net cash provided by (used in) financing activities			1,493	(3,115)
Comcast Holdings [Member]
Operating Activities
Net cash provided by (used in) operating activities			(8)	6
Investing Activities
Net transactions with affiliates			8	(6)
Net cash provided by (used in) investing activities			8	(6)
CCCL Parent [Member]
Operating Activities
Net cash provided by (used in) operating activities			(120)	(100)
Investing Activities
Net transactions with affiliates			2,217	100
Net cash provided by (used in) investing activities			2,217	100
Financing Activities
Repurchases and repayments of debt			(2,097)
Net cash provided by (used in) financing activities			(2,097)
Combined CCHMO Parents [Member]
Operating Activities
Net cash provided by (used in) operating activities			(47)	(71)
Investing Activities
Net transactions with affiliates			47	624
Net cash provided by (used in) investing activities			47	624
Financing Activities
Repurchases and repayments of debt				(553)
Net cash provided by (used in) financing activities				(553)
NBCUniversal Media Parent [Member]
Operating Activities
Net cash provided by (used in) operating activities			(582)	(739)
Investing Activities
Net transactions with affiliates			(984)	1,708
Return of capital from investees			128
Purchases of investments			(2)	(3)
Other			(10)	(12)
Net cash provided by (used in) investing activities			(868)	1,693
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				(550)
Repurchases and repayments of debt			(88)
Purchase of NBCUniversal noncontrolling common equity interest			(3,200)
Other			(40)
Net cash provided by (used in) financing activities			(3,328)	(550)
Increase (decrease) in cash and cash equivalents			(4,778)	404
Cash and cash equivalents, beginning of period			5,129	238
Cash and cash equivalents, end of period	351	642	351	642
Comcast Non-Guarantor Subsidiaries [Member]
Operating Activities
Net cash provided by (used in) operating activities			8,623	8,913
Investing Activities
Net transactions with affiliates			13	(5,743)
Capital expenditures			(2,865)	(2,457)
Cash paid for intangible assets			(443)	(410)
Acquisition of 30 Rockefeller Plaza properties			(1,311)
Proceeds from sales of businesses and investments			91	64
Return of capital from investees			18	7
Purchases of investments			(631)	(105)
Other			76	95
Net cash provided by (used in) investing activities			(5,052)	(8,549)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net			(2)	(3)
Repurchases and repayments of debt			(10)	(14)
Purchase of NBCUniversal noncontrolling common equity interest			(7,561)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock			(116)	(233)
Settlement of Station Venture liability			(602)
Other			(64)	(37)
Net cash provided by (used in) financing activities			(8,355)	(287)
Increase (decrease) in cash and cash equivalents			(4,784)	77
Cash and cash equivalents, beginning of period			5,822	1,382
Cash and cash equivalents, end of period	$ 1,038	$ 1,459	$ 1,038	$ 1,459