0001166691-20-000032 | 10-Q | XBRL Viewer

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Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2020 shares
Document And Entity Information [Line Items]
Document Type	10-Q
Document Fiscal Period Focus	Q3
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Amendment Flag	false
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-31
Entity File Number	001-32871
Entity Registrant Name	COMCAST CORPORATION
Entity Central Index Key	0001166691
Entity Tax Identification Number	27-0000798
Entity Incorporation, State or Country Code	PA
Entity Address, Address Line One	One Comcast Center
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19103-2838
City Area Code	215
Local Phone Number	286-1700
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Class A Common Stock [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $0.01 par value
Trading Symbol	CMCSA
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding	4,565,878,780
0.250% Notes Due 2027 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	0.250% Notes due 2027
Trading Symbol	CMCS27
Security Exchange Name	NASDAQ
1.500% Notes Due 2029 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	1.500% Notes due 2029
Trading Symbol	CMCS29
Security Exchange Name	NASDAQ
0.750% Notes Due 2032 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	0.750% Notes due 2032
Trading Symbol	CMCS32
Security Exchange Name	NASDAQ
1.875% Notes Due 2036 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	1.875% Notes due 2036
Trading Symbol	CMCS36
Security Exchange Name	NASDAQ
1.250% Notes Due 2040 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	1.250% Notes due 2040
Trading Symbol	CMCS40
Security Exchange Name	NASDAQ
9.455% Guaranteed Notes Due 2022 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	9.455% Guaranteed Notes due 2022
Trading Symbol	CMCSA/22
Security Exchange Name	NYSE
5.50% Notes Due 2029 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	5.50% Notes due 2029
Trading Symbol	CCGBP29
Security Exchange Name	NYSE
2.0% Exchangeable Subordinated Debentures Due 2029 [Member]
Document And Entity Information [Line Items]
Title of 12(b) Security	2.0% Exchangeable Subordinated Debentures due 2029
Trading Symbol	CCZ
Security Exchange Name	NYSE
Class B Common Stock [Member]
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	9,444,375

Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 25,532	$ 26,827	$ 75,856	$ 80,544
Costs and Expenses:
Programming and production	8,565	8,316	23,683	25,140
Other operating and administrative	8,059	8,090	23,959	24,076
Advertising, marketing and promotion	1,512	1,901	4,791	5,674
Depreciation	2,122	2,124	6,328	6,561
Amortization	1,198	1,056	3,520	3,215
Total costs and expenses	21,456	21,487	62,281	64,666
Operating income	4,076	5,340	13,575	15,878
Interest expense	(1,220)	(1,167)	(3,544)	(3,454)
Investment and other income (loss), net	(86)	(110)	(382)	511
Income before income taxes	2,770	4,063	9,649	12,935
Income tax expense	(739)	(775)	(2,385)	(2,812)
Net income	2,031	3,288	7,264	10,123
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	12	71	110	228
Net income attributable to Comcast Corporation	$ 2,019	$ 3,217	$ 7,154	$ 9,895
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.44	$ 0.71	$ 1.57	$ 2.18
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.44	$ 0.70	$ 1.55	$ 2.15

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,031	$ 3,288	$ 7,264	$ 10,123
Unrealized gains (losses) on marketable securities, net of deferred taxes of $—, $—, $1 and $—	1	2	(1)	4
Deferred gains (losses) on cash flow hedges, net of deferred taxes of $6, $(35), $23 and $(24)	(99)	82	(72)	146
Amounts reclassified to net income:
Realized (gains) losses on cash flow hedges, net of deferred taxes of $8, $11, $29 and $7	(8)	(52)	(135)	(39)
Employee benefit obligations, net of deferred taxes of $2, $3, $7 and $8	(8)	(8)	(24)	(24)
Currency translation adjustments, net of deferred taxes of $40, $(80), $24 and $(98)	1,642	(1,144)	(589)	(903)
Comprehensive income	3,559	2,168	6,443	9,307
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	12	71	110	228
Less: Other comprehensive income (loss) attributable to noncontrolling interests	37	(23)	14	(25)
Comprehensive income (loss) attributable to Comcast Corporation	$ 3,510	$ 2,120	$ 6,319	$ 9,104

Condensed Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on marketable securities, deferred taxes	$ 0	$ 0	$ 1	$ 0
Deferred gains (losses) on cash flow hedges, deferred taxes	6	(35)	23	(24)
Realized (gains) losses on cash flow hedges, deferred taxes	8	11	29	7
Employee benefit obligations, deferred taxes	2	3	7	8
Currency translation adjustments, deferred taxes	$ 40	$ (80)	$ 24	$ (98)

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net income	$ 7,264	$ 10,123
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,848	9,776
Share-based compensation	922	790
Noncash interest expense (income), net	606	310
Net (gain) loss on investment activity and other	514	(166)
Deferred income taxes	(224)	468
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Current and noncurrent receivables, net	982	360
Film and television costs, net	163	(321)
Accounts payable and accrued expenses related to trade creditors	(545)	(1,149)
Other operating assets and liabilities	165	(729)
Net cash provided by operating activities	19,695	19,462
Investing Activities
Capital expenditures	(6,344)	(6,866)
Cash paid for intangible assets	(1,771)	(1,686)
Construction of Universal Beijing Resort	(1,118)	(736)
Acquisitions, net of cash acquired	(225)	(181)
Proceeds from sales of businesses and investments	2,131	208
Purchases of investments	(545)	(1,697)
Other	(101)	46
Net cash provided by (used in) investing activities	(7,973)	(10,912)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net	0	(1,288)
Proceeds from borrowings	18,339	516
Proceeds from collateralized obligation	0	5,175
Repurchases and repayments of debt	(16,771)	(9,975)
Repurchases of common stock under employee plans	(429)	(432)
Dividends paid	(3,086)	(2,778)
Other	(1,644)	(44)
Net cash provided by (used in) financing activities	(3,591)	(8,826)
Impact of foreign currency on cash, cash equivalents and restricted cash	17	(31)
Increase (decrease) in cash, cash equivalents and restricted cash	8,148	(307)
Cash, cash equivalents and restricted cash, beginning of period	5,589	3,909
Cash, cash equivalents and restricted cash, end of period	$ 13,737	$ 3,602

Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 13,707	$ 5,500
Receivables, net	10,310	11,292
Programming rights	0
Programming rights		3,877
Other current assets	3,352	4,723
Total current assets	27,369	25,392
Film and television costs	12,741
Film and television costs		8,933
Investments	6,702	6,989
Investment securing collateralized obligation	429	694
Property and equipment, net of accumulated depreciation of $53,959 and $53,239	50,466	48,322
Goodwill	68,898	68,725
Franchise rights	59,365	59,365
Other intangible assets, net of accumulated amortization of $18,405 and $17,217	34,485	36,128
Other noncurrent assets, net	8,485	8,866
Total assets	268,940	263,414
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	10,979	10,826
Accrued participations and residuals	1,794	1,730
Deferred revenue	2,888	2,768
Accrued expenses and other current liabilities	9,421	10,516
Current portion of long-term debt	4,429	4,452
Total current liabilities	29,511	30,292
Long-term debt, less current portion	99,995	97,765
Collateralized obligation	5,167	5,166
Deferred income taxes	27,905	28,180
Other noncurrent liabilities	17,537	16,765
Commitments and contingencies (Note 12)
Redeemable noncontrolling interests	1,254	1,372
Equity:
Preferred stock—authorized, 20,000,000 shares; issued, zero	0	0
Additional paid-in capital	39,173	38,447
Retained earnings	54,254	50,695
Treasury stock, 872,791,028 Class A common shares	(7,517)	(7,517)
Accumulated other comprehensive income (loss)	212	1,047
Total Comcast Corporation shareholders’ equity	86,176	82,726
Noncontrolling interests	1,395	1,148
Total equity	87,571	83,874
Total liabilities and equity	268,940	263,414
Class A Common Stock [Member]
Equity:
Common stock	$ 54	$ 54
Treasury stock (in shares)	872,791,028	872,791,028
Class B Common Stock [Member]
Equity:
Common stock	$ 0	$ 0

Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Property and equipment - accumulated depreciation	$ 53,959	$ 53,239
Other intangible assets - accumulated amortization	$ 18,405	$ 17,217
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Class A Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	7,500,000,000	7,500,000,000
Common stock, shares issued (in shares)	5,438,669,808	5,416,381,298
Common stock, shares outstanding (in shares)	4,565,878,780	4,543,590,270
Treasury stock (in shares)	872,791,028	872,791,028
Class B Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	9,444,375	9,444,375
Common stock, shares outstanding (in shares)	9,444,375	9,444,375

Condensed Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Redeemable Noncontrolling Interests and Redeemable Subsidiary Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock at Cost [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Class A Common Stock [Member] Common Stock [Member]
Beginning balance at Dec. 31, 2018		$ 1,316
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(49)
Other		(28)
Net income (loss)		129
Ending balance at Sep. 30, 2019		1,368
Beginning balance at Dec. 31, 2018			$ 37,461	$ 41,983	$ 0	$ (7,517)	$ (368)	$ 889	$ 54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation plans			604
Repurchases of common stock under employee plans			(39)	(406)
Employee stock purchase plans			166
Dividends declared				(2,893)
Other comprehensive income (loss)							(791)	(24)
Contributions from (distributions to) noncontrolling interests, net								66
Other			4	(9)				(14)
Net income (loss)	$ 9,895			9,895
Net income (loss)								99
Ending balance at Sep. 30, 2019	$ 79,160		38,196	48,570		(7,517)	(1,159)	1,016	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.63
Beginning balance at Jun. 30, 2019		1,329
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(12)
Other		(9)
Net income (loss)		60
Ending balance at Sep. 30, 2019		1,368
Beginning balance at Jun. 30, 2019			37,950	46,425	0	(7,517)	(62)	980	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation plans			193
Repurchases of common stock under employee plans			6	(101)
Employee stock purchase plans			51
Dividends declared				(965)
Other comprehensive income (loss)							(1,097)	(22)
Contributions from (distributions to) noncontrolling interests, net								50
Other			(4)	(6)				(3)
Net income (loss)	$ 3,217			3,217
Net income (loss)								11
Ending balance at Sep. 30, 2019	$ 79,160		38,196	48,570		(7,517)	(1,159)	1,016	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.21
Beginning balance at Dec. 31, 2019	$ 1,372	1,372
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(46)
Other		(174)
Net income (loss)		102
Ending balance at Sep. 30, 2020	1,254	1,254
Beginning balance at Dec. 31, 2019	83,874		38,447	50,695	(124)	(7,517)	1,047	1,148	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation plans			713
Repurchases of common stock under employee plans			(164)	(281)
Employee stock purchase plans			193
Dividends declared				(3,187)
Other comprehensive income (loss)							(835)	14
Contributions from (distributions to) noncontrolling interests, net								200
Other			(16)	(3)				25
Net income (loss)	7,154			7,154
Net income (loss)								8
Ending balance at Sep. 30, 2020	$ 87,571		39,173	54,254		(7,517)	212	1,395	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.69
Beginning balance at Jun. 30, 2020		1,256
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(9)
Other		(9)
Net income (loss)		16
Ending balance at Sep. 30, 2020	$ 1,254	$ 1,254
Beginning balance at Jun. 30, 2020			38,936	53,420	$ 0	(7,517)	(1,279)	1,177	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation plans			240
Repurchases of common stock under employee plans			(61)	(113)
Employee stock purchase plans			60
Dividends declared				(1,062)
Other comprehensive income (loss)							1,491	38
Contributions from (distributions to) noncontrolling interests, net								185
Other			(2)	(10)				(1)
Net income (loss)	2,019			2,019
Net income (loss)								(4)
Ending balance at Sep. 30, 2020	$ 87,571		$ 39,173	$ 54,254		$ (7,517)	$ 212	$ 1,395	$ 54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.23

Condensed Consolidated Financial Statements	9 Months Ended
Condensed Consolidated Financial Statements	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidated Financial Statements	Condensed Consolidated Financial Statements Business and Basis of Presentation We have prepared these unaudited condensed consolidated financial statements based on 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, cash flows and financial condition 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 2019 Annual Report on Form 10-K and the notes within this Form 10-Q.

Segment Information

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Segment Information

We present our operations in six reportable business segments: (1) Comcast Cable in one reportable business segment, referred to as Cable Communications; (2) NBCUniversal in four reportable business segments: Cable Networks, Broadcast Television, Filmed Entertainment and Theme Parks (collectively, the “NBCUniversal segments”); and (3) Sky in one reportable business segment.

Cable Communications is a leading provider of high-speed internet, video, voice, wireless, and security and automation services to residential customers under the Xfinity brand; we also provide these and other services to business customers and sell advertising.

Cable Networks consists primarily of our national cable networks that provide a variety of entertainment, news and information, and sports content; our regional sports and news networks; our international cable networks; our cable television studio production operations; and various digital properties.

Broadcast Television consists primarily of the NBC and Telemundo broadcast networks, our NBC and Telemundo owned local broadcast television stations, the NBC Universo national cable network, our broadcast television studio production operations, and various digital properties.

Filmed Entertainment consists primarily of the operations of Universal Pictures, which produces, acquires, markets and distributes filmed entertainment worldwide; our films are also produced under the Illumination, DreamWorks Animation and Focus Features names.

Theme Parks consists primarily of our Universal theme parks in Orlando, Florida; Hollywood, California; and Osaka, Japan. In addition, we are developing a theme park in Beijing, China along with a consortium of Chinese state-owned companies, and an additional theme park in Orlando, Florida.

Sky is one of Europe’s leading entertainment companies, which primarily includes a direct-to-consumer business, providing video, high-speed internet, voice and wireless phone services, and a content business, operating entertainment networks, the Sky News broadcast network and Sky Sports networks.

Our other business interests consist primarily of the operations of Comcast Spectacor, which owns the Philadelphia Flyers and the Wells Fargo Center arena in Philadelphia, Pennsylvania, and other business initiatives, such as Peacock, our new direct-to-consumer streaming service that primarily features NBCUniversal content.

We use Adjusted EBITDA to evaluate the profitability of our operating segments and the components of net income attributable to Comcast Corporation excluded from Adjusted EBITDA are not separately evaluated. Our financial data by business segment is presented in the tables below.


	Three Months Ended September 30, 2020
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	15,000	$	6,411	$	1,952	$	1,770	$	296
NBCUniversal
Cable Networks	2,736		870		191		6		3
Broadcast Television	2,414		436		38		13		7
Filmed Entertainment	1,280		300		26		2		4
Theme Parks	311		(203)		208		306		11
Headquarters and Other(a)	32		(121)		113		30		28
Eliminations(b)	(49)		(1)		—		—		—
NBCUniversal	6,724		1,281		576		357		53
Sky	4,793		515		750		237		176
Corporate and Other(c)	84		(496)		42		23		27
Eliminations(b)	(1,069)		(128)		—		—		—
Comcast Consolidated	$	25,532	$	7,583	$	3,320	$	2,387	$	552


	Three Months Ended September 30, 2019
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	14,584	$	5,801	$	1,967	$	1,814	$	336
NBCUniversal
Cable Networks	2,771		955		184		9		4
Broadcast Television	2,230		338		36		36		3
Filmed Entertainment	1,706		195		21		5		5
Theme Parks	1,631		731		182		400		8
Headquarters and Other(a)	21		(130)		114		55		43
Eliminations(b)	(64)		2		—		—		—
NBCUniversal	8,295		2,091		537		505		63
Sky	4,554		899		644		104		188
Corporate and Other(c)	42		(237)		32		88		21
Eliminations(b)	(648)		(1)		—		—		—
Comcast Consolidated	$	26,827	$	8,553	$	3,180	$	2,511	$	608


	Nine Months Ended September 30, 2020
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	44,346	$	18,663	$	5,835	$	4,491	$	978
NBCUniversal
Cable Networks	8,110		3,361		576		16		11
Broadcast Television	7,462		1,578		120		58		12
Filmed Entertainment	3,844		634		71		9		14
Theme Parks	1,267		(526)		590		897		42
Headquarters and Other(a)	79		(381)		358		129		107
Eliminations(b)	(180)		—		—		—		—
NBCUniversal	20,582		4,666		1,715		1,109		186
Sky	13,389		1,815		2,188		649		512
Corporate and Other(c)	250		(1,254)		110		95		95
Eliminations(b)	(2,711)		(250)		—		—		—
Comcast Consolidated	$	75,856	$	23,640	$	9,848	$	6,344	$	1,771


	Nine Months Ended September 30, 2019
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	43,314	$	17,383	$	6,038	$	4,771	$	962
NBCUniversal
Cable Networks	8,586		3,418		549		21		10
Broadcast Television	7,099		1,259		115		86		9
Filmed Entertainment	4,931		742		60		13		16
Theme Parks	4,371		1,819		514		1,172		44
Headquarters and Other(a)	60		(486)		341		139		120
Eliminations(b)	(233)		—		—		—		—
NBCUniversal	24,814		6,752		1,579		1,431		199
Sky	14,179		2,334		2,058		540		491
Corporate and Other(c)	206		(637)		101		124		34
Eliminations(b)	(1,969)		(10)		—		—		—
Comcast Consolidated	$	80,544	$	25,822	$	9,776	$	6,866	$	1,686

(a)NBCUniversal Headquarters and Other activities include costs associated with overhead, allocations, personnel costs and headquarter initiatives.

(b)Included in Eliminations are transactions that our segments enter into with one another. Our segments generally report transactions with one another as if they were stand-alone businesses in accordance with GAAP, and these transactions are eliminated in consolidation. When multiple segments enter into transactions to provide products and services to third parties, revenue is generally allocated to our segments based on relative value.

The most significant transactions between our segments include distribution revenue at Cable Networks for the sale of programming to Cable Communications; content licensing revenue in our NBCUniversal segments (Broadcast Television, Filmed Entertainment and Cable Networks) for the license of owned content to Peacock and Sky, and for licenses of owned content to other NBCUniversal segments; advertising revenue at Cable Communications, Cable Networks and Broadcast Television; and distribution revenue at Broadcast Television for fees received under retransmission consent agreements from Cable Communications. For segment reporting purposes, we account for intercompany content licenses as follows:

•Revenue for licenses of content from NBCUniversal segments to Peacock and Sky are generally recognized at a point in time, consistent with the recognition of transactions with third parties, when the content is delivered and made available for use. The costs of these licenses at Peacock and Sky are recognized as the content is used over the license period. The difference in timing of recognition between segments results in an Adjusted EBITDA impact in eliminations as the profits on these transactions are deferred in our consolidated results and recognized as the content is used over the license period.

•Revenue for licenses of content between NBCUniversal segments is recognized over time to correspond with the amortization of the programming rights asset for the licensed content as the content is used over the license period.

(c)Corporate and Other activities include costs associated with overhead and personnel, revenue and expenses associated with our other business interests, including Peacock.

(d)We use Adjusted EBITDA as the measure of profit or loss for our operating segments. Adjusted EBITDA is defined as net income attributable to Comcast Corporation before net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock, income tax expense, investment and other income (loss), net, interest expense, depreciation and amortization expense, and other operating gains and losses (such as impairment charges related to fixed and intangible assets and gains or losses on the sale of long-lived assets), if any. From time to time, we may exclude from Adjusted EBITDA the impact of certain events, gains, losses or other charges (such as significant legal settlements) that affect the period-to-period comparability of our operating performance. Our reconciliation of the aggregate amount of Adjusted EBITDA for our reportable segments to consolidated income before income taxes is presented in the table below.


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Adjusted EBITDA	$	7,583	$	8,553	$	23,640	$	25,822
Adjustment for potential legal settlement	(177)		—		(177)		—
Adjustment for Sky transaction-related costs	(10)		(33)		(40)		(168)
Depreciation	(2,122)		(2,124)		(6,328)		(6,561)
Amortization	(1,198)		(1,056)		(3,520)		(3,215)


Interest expense	(1,220)		(1,167)		(3,544)		(3,454)
Investment and other income (loss), net	(86)		(110)		(382)		511

Income before income taxes	$	2,770	$	4,063	$	9,649	$	12,935

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Revenue

9 Months Ended

Sep. 30, 2020

Revenues [Abstract]

Revenue


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Residential:
High-speed internet	$	5,198	$	4,721	$	15,199	$	13,961
Video	5,421		5,541		16,468		16,763
Voice	876		963		2,652		2,935
Wireless	400		326		1,069		795
Business services	2,049		1,971		6,096		5,795
Advertising	674		603		1,659		1,766
Other	382		459		1,203		1,299
Total Cable Communications(a)	15,000		14,584		44,346		43,314

Distribution	1,617		1,681		4,780		5,123
Advertising	793		809		2,306		2,592
Content licensing and other	326		281		1,024		871
Total Cable Networks	2,736		2,771		8,110		8,586

Advertising	1,054		1,191		3,331		3,837
Content licensing	740		447		2,224		1,479
Distribution and other	620		592		1,907		1,783
Total Broadcast Television	2,414		2,230		7,462		7,099

Theatrical	29		549		354		1,246
Content licensing	844		737		2,385		2,266
Home entertainment	278		185		678		681
Other	129		235		427		738
Total Filmed Entertainment	1,280		1,706		3,844		4,931

Total Theme Parks	311		1,631		1,267		4,371
Headquarters and Other	32		21		79		60
Eliminations(b)	(49)		(64)		(180)		(233)
Total NBCUniversal	6,724		8,295		20,582		24,814

Direct-to-consumer	3,943		3,793		11,146		11,516
Content	388		315		947		1,061
Advertising	462		446		1,296		1,602
Total Sky	4,793		4,554		13,389		14,179

Corporate and Other	84		42		250		206
Eliminations(b)	(1,069)		(648)		(2,711)		(1,969)
Total revenue	$	25,532	$	26,827	$	75,856	$	80,544

(a)For both the three and nine months ended September 30, 2020 and 2019, 2.6% of Cable Communications segment revenue was derived from franchise and other regulatory fees.

(b)Included in Eliminations are transactions that our segments enter into with one another. See Note 2 for a description of these transactions.

We operate primarily in the United States but also in select international markets. The table below summarizes revenue by geographic location.


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
United States	$	19,680	$	20,398	$	59,026	$	61,394
Europe	5,196		5,211		14,850		15,878
Other	656		1,218		1,980		3,272
Total revenue	$	25,532	$	26,827	$	75,856	$	80,544

No single customer accounted for a significant amount of revenue in any period presented.

Condensed Consolidated Balance Sheet

The following tables summarize our accounts receivable and other balances that are not separately presented in our condensed consolidated balance sheet that relate to the recognition of revenue and collection of the related cash, as well as deferred costs associated with our contracts with customers.


(in millions)	September 30, 2020		December 31, 2019
Receivables, gross	$	11,110	$	11,711
Less: Allowance for doubtful accounts	800		419
Receivables, net	$	10,310	$	11,292


(in millions)	September 30, 2020		December 31, 2019
Noncurrent receivables, net (included in other noncurrent assets, net)	$	1,138	$	1,337
Contract acquisition and fulfillment costs (included in other noncurrent assets, net)	$	1,043	$	1,083
Noncurrent deferred revenue (included in other noncurrent liabilities)	$	698	$	618

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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+ Details

Programming and Production Costs

9 Months Ended

Sep. 30, 2020

Other Industries [Abstract]

Programming and Production Costs

Film and Television Costs

Cable Networks, Broadcast Television, Filmed Entertainment and Sky produce owned content or acquire the rights to programming from third parties, which are described as owned film and television costs and programming rights, respectively. We adopted new accounting guidance related to film and television costs in the first quarter of 2020 (see Note 8), and accordingly amounts presented below for periods in 2020 and the policy discussion reflect the updated accounting guidance, and amounts presented for 2019 reflect the accounting guidance in effect at that time. Under the new accounting guidance, we have determined that the predominant monetization strategy for the substantial majority of our content is on an individual basis.

Amortization of Film and Television Costs


(in millions)	Three Months Ended September 30, 2020		Nine Months Ended September 30, 2020
Owned film and television costs	$	1,556	$	4,883

Programming rights	$	3,526	$	7,774

Capitalized Film and Television Costs


	September 30, 2020		December 31, 2019
(in millions)	Film and Television Costs		Film Costs		Television Costs		Total
Owned film and television costs:
Released, less amortization	$	3,578	$	1,551	$	2,810	$	4,361
Completed, not released	147		187		—		187
In production and in development	2,608		1,314		1,162		2,476
	6,333		3,052		3,972		7,024
Programming rights, less amortization	6,408						5,786
	12,741						12,810
Less: Current portion of programming rights	—						3,877
Film and television costs	$	12,741					$	8,933

The table below summarizes estimated future amortization expense for the capitalized film and television costs recorded in our condensed consolidated balance sheet as of September 30, 2020.


(in millions)	Owned Film and Television Costs		Programming Rights
Completed, not released:
Remaining three months of 2020	$	20

Released and programming rights:
Remaining three months of 2020	$	440	$	1,739
2021	$	901	$	2,846
2022	$	463	$	760

Capitalization and Recognition of Film and Television Costs

We capitalize costs for owned film and television content, including direct costs, production overhead, print costs, development costs and interest, as well as acquired libraries. Amortization for content predominantly monetized on an individual basis and accrued costs associated with participations and residual payments are recorded using the individual film forecast computation method, which recognizes the costs in the same ratio as the associated ultimate revenue. Estimates of ultimate revenue and total costs are based on anticipated release patterns, public acceptance and historical results for similar productions. Amortization for content predominantly monetized with other owned or licensed content is recorded based on estimated usage. In determining the method of amortization and estimated life of an acquired film or television library, we generally use the method and the life that most closely follow the undiscounted cash flows over the estimated life of the asset. We do not capitalize costs related to the distribution of a film in movie theaters or the licensing or sale of a film or television production, which primarily include costs associated with marketing and distribution.

We may enter into cofinancing arrangements with third parties to jointly finance or distribute certain of our film productions. Cofinancing arrangements can take various forms, but in most cases involve the grant of an economic interest in a film to an investor who owns an undivided copyright interest in the film. The number of investors and the terms of these arrangements can vary, although investors generally assume the full risks and rewards for the portion of the film acquired in these arrangements. We account for the proceeds received from the investor under these arrangements as a reduction of our capitalized film costs and the investor’s interest in the profit or loss of the film is recorded as either a charge or a benefit, respectively, in programming and production costs. The investor’s interest in the profit or loss of a film is recorded each period using the individual film forecast computation method.

We capitalize the costs of programming rights for content that we license but do not own when the license period begins, the content is made available for use and the costs of programming licenses are known. Programming rights are amortized as the associated programs are broadcast.

Owned film and television costs and programming rights are presented as noncurrent assets in film and television costs. We present amortization of film and television costs and accrued costs associated with participation and residual payments in programming and production costs.

When an event or a change in circumstance occurs that was known or knowable as of the balance sheet date and that indicates the fair value of either owned film and television content or programming rights is less than the unamortized costs in the

balance sheet, we determine the fair value and record an impairment charge to the extent the unamortized costs exceed the fair value. Owned film and television costs are assessed either individually or in identified film groups, for content predominantly monetized on an individual basis or with other content, respectively. The substantial majority of our owned film and television costs are evaluated for impairment on an individual title basis. Programming rights that are not part of a film group are generally assessed in packages, channels, or dayparts. A daypart is an aggregation of programs broadcast during a particular time of day or programs of a similar type. Programming rights licensed by Cable Networks are primarily tested on a channel basis for impairment, whereas programming rights licensed by Broadcast Television are tested on a daypart basis. Estimated fair values of owned film and television costs or programming rights are generally based on level 3 inputs including analysis of market participant estimates of future cash flows. We record charges related to impairments or content that is substantively abandoned to programming and production costs. Impairments of capitalized film and television costs were not material in any of the periods presented.

Sports Programming Rights

We recognize the costs of multiyear, live-event sports programming rights as the rights are utilized over the contract term based on estimated relative value. Estimated relative value is generally based on the ratio of the current period revenue to the estimated ultimate revenue or the terms of the contract. When cash payments, including advanced payments, exceed the relative value of the programming delivered, we recognize an asset in programming rights. Production costs incurred in advance of airing are also presented in programming rights.

Earnings Per Share

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

Computation of Diluted EPS


	Three Months Ended September 30,
	2020					2019
(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	$	2,019	4,577	$	0.44	$	3,217	4,551	$	0.71
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock plans			51					68
Diluted EPS attributable to Comcast Corporation shareholders	$	2,019	4,628	$	0.44	$	3,217	4,619	$	0.70


	Nine Months Ended September 30,
	2020					2019
(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	$	7,154	4,571	$	1.57	$	9,895	4,544	$	2.18
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock plans			45					62
Diluted EPS attributable to Comcast Corporation shareholders	$	7,154	4,616	$	1.55	$	9,895	4,606	$	2.15

Diluted earnings per common share attributable to Comcast Corporation shareholders (“diluted EPS”) considers the impact of potentially dilutive securities using the treasury stock method. Our potentially dilutive securities include potential common shares related to our stock options and our restricted share units (“RSUs”). Diluted EPS excludes the impact of potential common shares related to our stock options in periods in which the combination of the option exercise price and the associated unrecognized compensation expense is greater than the average market price of our common stock. The amount of potential common shares related to our share-based compensation plans that were excluded from diluted EPS because their effect would

have been antidilutive was not material for the three and nine months ended September 30, 2020 or 2019.

Long-Term Debt	9 Months Ended
Long-Term Debt	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term DebtAs of September 30, 2020, our debt had a carrying value of $104.4 billion and an estimated fair value of $124.2 billion. The estimated fair value of our publicly traded debt was primarily based on level 1 inputs that use quoted market value for the debt. The estimated fair value of debt for which there are no quoted market prices was based on level 2 inputs that use interest rates available to us for debt with similar terms and remaining maturities.

Significant Transactions	9 Months Ended
Significant Transactions	Sep. 30, 2020
Business Combinations [Abstract]
Significant Transactions	Significant Transactions Universal Beijing Resort We entered into an agreement with a consortium of Chinese state-owned companies to build and operate a Universal theme park and resort in Beijing, China (“Universal Beijing Resort”). We own a 30% interest in Universal Beijing Resort and the construction is being funded through a combination of debt financing and equity contributions from the investors in accordance with their equity interests. As of September 30, 2020, Universal Beijing Resort had $2.1 billion principal amount of a term loan outstanding under the debt financing agreement. As of September 30, 2020, our condensed consolidated balance sheet included assets, primarily property and equipment, and liabilities, including the term loan, of Universal Beijing Resort totaling $4.5 billion and $3.0 billion, respectively.

Recent Accounting Pronouncements	9 Months Ended
Recent Accounting Pronouncements	Sep. 30, 2020
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Film and Television Costs In March 2019, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to film and television costs. The updated guidance aligned the accounting for production costs of episodic television series with those of films, allowing for costs to be capitalized in excess of amounts of revenue contracted for each episode. The guidance also updated certain presentation and disclosure requirements for capitalized film and television costs, and when content is predominantly monetized with other owned or licensed content the guidance requires impairment testing for capitalized film and television costs to be performed at a film group level and amortization to be based on usage. We adopted the updated guidance on January 1, 2020 on a prospective basis and as a result, prior period amounts were not adjusted. Following the adoption, we now present all film and television costs, including acquired programming rights previously classified as current, as noncurrent in the condensed consolidated balance sheet. The adoption of the updated accounting guidance did not have a material impact on our consolidated results of operations or financial position. See Note 4 for further information. Credit Losses In June 2016, the FASB updated the accounting guidance related to the measurement of credit losses on financial instruments, including trade receivables and loans. The updated guidance requires the recognition of credit losses on financial instruments based on an estimate of expected losses, replacing the incurred loss model in the prior guidance. We adopted the updated guidance on January 1, 2020 on a prospective basis, recording $124 million, net of tax, as a cumulative effect adjustment to retained earnings and as a result, prior period amounts were not adjusted. The adoption of the updated accounting guidance did not have a material impact on our consolidated results of operations or financial position for any periods presented.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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+ Details

Investments

9 Months Ended

Sep. 30, 2020

Investments [Abstract]

Investments

Investment and Other Income (Loss), Net


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Equity in net income (losses) of investees, net	$	(266)	$	(355)	$	(634)	$	(295)
Realized and unrealized gains (losses) on equity securities, net	118		174		65		582
Other income (loss), net	62		71		187		224
Investment and other income (loss), net	$	(86)	$	(110)	$	(382)	$	511


(in millions)	September 30, 2020		December 31, 2019
Equity method	$	5,097	$	5,347
Marketable equity securities	141		353
Nonmarketable equity securities	1,833		1,896
Other investments	138		1,796
Total investments	7,209		9,392
Less: Current investments	78		1,709
Less: Investment securing collateralized obligation	429		694
Noncurrent investments	$	6,702	$	6,989

Equity Method

Atairos

Atairos follows investment company accounting and records its investments at their fair values each reporting period with the net gains or losses reflected in its statement of operations. We recognize our share of these gains and losses in equity in net income (losses) of investees, net. For the three and nine months ended September 30, 2020, we recognized losses of $107 million and $242 million, respectively. For the three and nine months ended September 30, 2019, we recognized a loss of $262 million and income of $6 million, respectively. For the nine months ended September 30, 2020 and 2019, we made cash capital contributions to Atairos totaling $184 million and $475 million, respectively. As of September 30, 2020 and December 31, 2019, our investment in Atairos was $3.3 billion and $3.2 billion, respectively.

Hulu and Collateralized Obligation

For the three and nine months ended September 30, 2020, we recognized losses of $104 million and $265 million, respectively, in equity in net income (losses) of investees, net. For the three and nine months ended September 30, 2019, we recognized losses of $101 million and $351 million, respectively, in equity in net income (losses) of investees, net and in the first quarter of 2019, we recognized a previously deferred dilution gain of $159 million in other income (loss), net. For the nine months ended September 30, 2019, we made cash capital contributions totaling $903 million to Hulu, inclusive of the funding to acquire our proportionate share of AT&T’s previously held 10% interest. There were no cash capital contributions made during the nine months ended September 30, 2020. As of September 30, 2020 and December 31, 2019, our investment was $429 million and $694 million, respectively.

In 2019, we borrowed $5.2 billion under a term loan facility due March 2024 which is fully collateralized by the minimum guaranteed proceeds of the put/call option related to our investment in Hulu. As of September 30, 2020, both the carrying value and fair value of our collateralized obligation was $5.2 billion. The estimated fair value was based on level 2 inputs that use interest rates for debt with similar terms and remaining maturities. We present our investment in Hulu and the term loan separately in our condensed consolidated balance sheet in the captions “investment securing collateralized obligation” and “collateralized obligation,” respectively. The recorded value of our investment reflects our historical cost in applying the equity method, and as a result, is less than its fair value.

Marketable Equity Securities

Peloton

Following Peloton’s initial public offering in September 2019, we recognized unrealized gains of $150 million in realized and unrealized gains (losses) on equity securities, net and presented our investment in Peloton in marketable equity securities, which was previously presented in nonmarketable equity securities. In the second quarter of 2020, we sold our investment in Peloton

and recognized gains of $67 million in realized and unrealized gains (losses) on equity securities, net. As of December 31, 2019, our investment in Peloton was $294 million.

Snap

In the fourth quarter of 2019, we sold our investment in Snap. For the three and nine months ended September 30, 2019, we recognized unrealized gains of $45 million and $303 million, respectively, in realized and unrealized gains (losses) on equity securities, net.

Other Investments

AirTouch

In April 2020, Verizon Americas, Inc., formerly known as AirTouch Communications, Inc. (“AirTouch”), redeemed the two series of preferred stock and we received cash payments totaling $1.7 billion. Subsequently, we redeemed and repurchased the three series of preferred shares issued by one of our consolidated subsidiaries and made cash payments totaling $1.8 billion.

As of December 31, 2019, our AirTouch investment was $1.6 billion, and the associated liability related to redeemable subsidiary preferred shares was $1.7 billion.

Intangible Assets

9 Months Ended

Sep. 30, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets


		September 30, 2020				December 31, 2019
(in millions)	Weighted-Average Original Useful Life as of September 30, 2020	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Indefinite-Lived Intangible Assets:
Franchise rights	N/A	$	59,365			$	59,365
Trade names	N/A	—				8,809
FCC licenses	N/A	2,345				2,337
Finite-Lived Intangible Assets:
Customer relationships	14 years	21,665		$	(8,363)	22,884		$	(8,295)
Software	5 years	16,770		(8,786)		15,357		(7,287)
Other agreements and rights	28 years	12,110		(1,256)		3,958		(1,635)
Total		$	112,255	$	(18,405)	$	112,710	$	(17,217)

Estimated Amortization Expense of Finite-Lived Intangible Assets


(in millions)
Remaining three months of 2020	$	1,190
2021	$	4,443
2022	$	3,868
2023	$	3,209
2024	$	2,524

Supplemental Financial Information

9 Months Ended

Sep. 30, 2020

Supplemental Financial Information [Abstract]

Supplemental Financial Information

Share-Based Compensation

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

In March 2020, we granted 15.8 million RSUs and 59.9 million stock options related to our annual management awards. The weighted-average fair values associated with these grants were $42.47 per RSU and $6.53 per stock option.

Recognized Share-Based Compensation Expense


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Restricted share units	$	164	$	143	$	484	$	437
Stock options	72		57		226		176
Employee stock purchase plans	9		8		30		23
Total	$	245	$	208	$	740	$	636

As of September 30, 2020, we had unrecognized pretax compensation expense of $1.3 billion and $615 million related to nonvested RSUs and nonvested stock options, respectively.

Cash Payments for Interest and Income Taxes


	Nine Months Ended September 30,
(in millions)	2020		2019
Interest	$	2,845	$	3,167
Income taxes	$	2,298	$	2,490

Noncash Activities

During the nine months ended September 30, 2020:

•we acquired $1.9 billion of property and equipment and intangible assets that were accrued but unpaid

•we recorded a liability of $1.1 billion for a quarterly cash dividend of $0.23 per common share paid in October 2020

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in the condensed consolidated balance sheet to the total of the amounts reported in our condensed consolidated statement of cash flows.


(in millions)	September 30, 2020		December 31, 2019
Cash and cash equivalents	$	13,707	$	5,500
Restricted cash included in other current assets	11		42
Restricted cash included in other noncurrent assets, net	19		47
Cash, cash equivalents and restricted cash, end of period	$	13,737	$	5,589

Accumulated Other Comprehensive Income (Loss)


(in millions)	September 30, 2020		September 30, 2019
Unrealized gains (losses) on marketable securities	$	5	$	7
Deferred gains (losses) on cash flow hedges	(68)		162
Unrecognized gains (losses) on employee benefit obligations	241		301
Cumulative translation adjustments	34		(1,629)
Accumulated other comprehensive income (loss), net of deferred taxes	$	212	$	(1,159)

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Redeemable Subsidiary Preferred Stock As of September 30, 2020, the fair value of the NBCUniversal Enterprise redeemable subsidiary preferred stock was $731 million. The estimated fair value is based on level 2 inputs that use 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. Contingencies We are subject to 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 and injure our reputation.

Condensed Consolidated Financial Statements (Policies)	9 Months Ended
Condensed Consolidated Financial Statements (Policies)	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	We have prepared these unaudited condensed consolidated financial statements based on 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, cash flows and financial condition 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 2019 Annual Report on Form 10-K and the notes within this Form 10-Q.
Film and Television Costs	We capitalize costs for owned film and television content, including direct costs, production overhead, print costs, development costs and interest, as well as acquired libraries. Amortization for content predominantly monetized on an individual basis and accrued costs associated with participations and residual payments are recorded using the individual film forecast computation method, which recognizes the costs in the same ratio as the associated ultimate revenue. Estimates of ultimate revenue and total costs are based on anticipated release patterns, public acceptance and historical results for similar productions. Amortization for content predominantly monetized with other owned or licensed content is recorded based on estimated usage. In determining the method of amortization and estimated life of an acquired film or television library, we generally use the method and the life that most closely follow the undiscounted cash flows over the estimated life of the asset. We do not capitalize costs related to the distribution of a film in movie theaters or the licensing or sale of a film or television production, which primarily include costs associated with marketing and distribution. We may enter into cofinancing arrangements with third parties to jointly finance or distribute certain of our film productions. Cofinancing arrangements can take various forms, but in most cases involve the grant of an economic interest in a film to an investor who owns an undivided copyright interest in the film. The number of investors and the terms of these arrangements can vary, although investors generally assume the full risks and rewards for the portion of the film acquired in these arrangements. We account for the proceeds received from the investor under these arrangements as a reduction of our capitalized film costs and the investor’s interest in the profit or loss of the film is recorded as either a charge or a benefit, respectively, in programming and production costs. The investor’s interest in the profit or loss of a film is recorded each period using the individual film forecast computation method.
Entertainment Entities	We capitalize the costs of programming rights for content that we license but do not own when the license period begins, the content is made available for use and the costs of programming licenses are known. Programming rights are amortized as the associated programs are broadcast.
Film Costs and Entertainment Entities	Owned film and television costs and programming rights are presented as noncurrent assets in film and television costs. We present amortization of film and television costs and accrued costs associated with participation and residual payments in programming and production costs. When an event or a change in circumstance occurs that was known or knowable as of the balance sheet date and that indicates the fair value of either owned film and television content or programming rights is less than the unamortized costs in the balance sheet, we determine the fair value and record an impairment charge to the extent the unamortized costs exceed the fair value. Owned film and television costs are assessed either individually or in identified film groups, for content predominantly monetized on an individual basis or with other content, respectively. The substantial majority of our owned film and television costs are evaluated for impairment on an individual title basis. Programming rights that are not part of a film group are generally assessed in packages, channels, or dayparts. A daypart is an aggregation of programs broadcast during a particular time of day or programs of a similar type. Programming rights licensed by Cable Networks are primarily tested on a channel basis for impairment, whereas programming rights licensed by Broadcast Television are tested on a daypart basis. Estimated fair values of owned film and television costs or programming rights are generally based on level 3 inputs including analysis of market participant estimates of future cash flows. We record charges related to impairments or content that is substantively abandoned to programming and production costs. Impairments of capitalized film and television costs were not material in any of the periods presented. Sports Programming Rights We recognize the costs of multiyear, live-event sports programming rights as the rights are utilized over the contract term based on estimated relative value. Estimated relative value is generally based on the ratio of the current period revenue to the estimated ultimate revenue or the terms of the contract. When cash payments, including advanced payments, exceed the relative value of the programming delivered, we recognize an asset in programming rights. Production costs incurred in advance of airing are also presented in programming rights.
Earnings Per Share	Diluted earnings per common share attributable to Comcast Corporation shareholders (“diluted EPS”) considers the impact of potentially dilutive securities using the treasury stock method. Our potentially dilutive securities include potential common shares related to our stock options and our restricted share units (“RSUs”). Diluted EPS excludes the impact of potential common shares related to our stock options in periods in which the combination of the option exercise price and the associated unrecognized compensation expense is greater than the average market price of our common stock.
Recent Accounting Pronouncements	Film and Television Costs In March 2019, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to film and television costs. The updated guidance aligned the accounting for production costs of episodic television series with those of films, allowing for costs to be capitalized in excess of amounts of revenue contracted for each episode. The guidance also updated certain presentation and disclosure requirements for capitalized film and television costs, and when content is predominantly monetized with other owned or licensed content the guidance requires impairment testing for capitalized film and television costs to be performed at a film group level and amortization to be based on usage. We adopted the updated guidance on January 1, 2020 on a prospective basis and as a result, prior period amounts were not adjusted. Following the adoption, we now present all film and television costs, including acquired programming rights previously classified as current, as noncurrent in the condensed consolidated balance sheet. The adoption of the updated accounting guidance did not have a material impact on our consolidated results of operations or financial position. See Note 4 for further information. Credit Losses In June 2016, the FASB updated the accounting guidance related to the measurement of credit losses on financial instruments, including trade receivables and loans. The updated guidance requires the recognition of credit losses on financial instruments based on an estimate of expected losses, replacing the incurred loss model in the prior guidance. We adopted the updated guidance on January 1, 2020 on a prospective basis, recording $124 million, net of tax, as a cumulative effect adjustment to retained earnings and as a result, prior period amounts were not adjusted. The adoption of the updated accounting guidance did not have a material impact on our consolidated results of operations or financial position for any periods presented.

Segment Information (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Financial Data by Business Segment

Our financial data by business segment is presented in the tables below.


	Three Months Ended September 30, 2020
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	15,000	$	6,411	$	1,952	$	1,770	$	296
NBCUniversal
Cable Networks	2,736		870		191		6		3
Broadcast Television	2,414		436		38		13		7
Filmed Entertainment	1,280		300		26		2		4
Theme Parks	311		(203)		208		306		11
Headquarters and Other(a)	32		(121)		113		30		28
Eliminations(b)	(49)		(1)		—		—		—
NBCUniversal	6,724		1,281		576		357		53
Sky	4,793		515		750		237		176
Corporate and Other(c)	84		(496)		42		23		27
Eliminations(b)	(1,069)		(128)		—		—		—
Comcast Consolidated	$	25,532	$	7,583	$	3,320	$	2,387	$	552


	Three Months Ended September 30, 2019
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	14,584	$	5,801	$	1,967	$	1,814	$	336
NBCUniversal
Cable Networks	2,771		955		184		9		4
Broadcast Television	2,230		338		36		36		3
Filmed Entertainment	1,706		195		21		5		5
Theme Parks	1,631		731		182		400		8
Headquarters and Other(a)	21		(130)		114		55		43
Eliminations(b)	(64)		2		—		—		—
NBCUniversal	8,295		2,091		537		505		63
Sky	4,554		899		644		104		188
Corporate and Other(c)	42		(237)		32		88		21
Eliminations(b)	(648)		(1)		—		—		—
Comcast Consolidated	$	26,827	$	8,553	$	3,180	$	2,511	$	608


	Nine Months Ended September 30, 2020
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	44,346	$	18,663	$	5,835	$	4,491	$	978
NBCUniversal
Cable Networks	8,110		3,361		576		16		11
Broadcast Television	7,462		1,578		120		58		12
Filmed Entertainment	3,844		634		71		9		14
Theme Parks	1,267		(526)		590		897		42
Headquarters and Other(a)	79		(381)		358		129		107
Eliminations(b)	(180)		—		—		—		—
NBCUniversal	20,582		4,666		1,715		1,109		186
Sky	13,389		1,815		2,188		649		512
Corporate and Other(c)	250		(1,254)		110		95		95
Eliminations(b)	(2,711)		(250)		—		—		—
Comcast Consolidated	$	75,856	$	23,640	$	9,848	$	6,344	$	1,771


	Nine Months Ended September 30, 2019
(in millions)	Revenue		Adjusted EBITDA(d)		Depreciation and Amortization		Capital Expenditures		Cash Paid for Intangible Assets
Cable Communications	$	43,314	$	17,383	$	6,038	$	4,771	$	962
NBCUniversal
Cable Networks	8,586		3,418		549		21		10
Broadcast Television	7,099		1,259		115		86		9
Filmed Entertainment	4,931		742		60		13		16
Theme Parks	4,371		1,819		514		1,172		44
Headquarters and Other(a)	60		(486)		341		139		120
Eliminations(b)	(233)		—		—		—		—
NBCUniversal	24,814		6,752		1,579		1,431		199
Sky	14,179		2,334		2,058		540		491
Corporate and Other(c)	206		(637)		101		124		34
Eliminations(b)	(1,969)		(10)		—		—		—
Comcast Consolidated	$	80,544	$	25,822	$	9,776	$	6,866	$	1,686

(a)NBCUniversal Headquarters and Other activities include costs associated with overhead, allocations, personnel costs and headquarter initiatives.

(c)Corporate and Other activities include costs associated with overhead and personnel, revenue and expenses associated with our other business interests, including Peacock.


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Adjusted EBITDA	$	7,583	$	8,553	$	23,640	$	25,822
Adjustment for potential legal settlement	(177)		—		(177)		—
Adjustment for Sky transaction-related costs	(10)		(33)		(40)		(168)
Depreciation	(2,122)		(2,124)		(6,328)		(6,561)
Amortization	(1,198)		(1,056)		(3,520)		(3,215)


Interest expense	(1,220)		(1,167)		(3,544)		(3,454)
Investment and other income (loss), net	(86)		(110)		(382)		511

Income before income taxes	$	2,770	$	4,063	$	9,649	$	12,935

Reconciliation of Adjusted EBITDA from Segments to Consolidated

Our reconciliation of the aggregate amount of Adjusted EBITDA for our reportable segments to consolidated income before income taxes is presented in the table below.


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Adjusted EBITDA	$	7,583	$	8,553	$	23,640	$	25,822
Adjustment for potential legal settlement	(177)		—		(177)		—
Adjustment for Sky transaction-related costs	(10)		(33)		(40)		(168)
Depreciation	(2,122)		(2,124)		(6,328)		(6,561)
Amortization	(1,198)		(1,056)		(3,520)		(3,215)


Interest expense	(1,220)		(1,167)		(3,544)		(3,454)
Investment and other income (loss), net	(86)		(110)		(382)		511

Income before income taxes	$	2,770	$	4,063	$	9,649	$	12,935

Revenue (Tables)

9 Months Ended

Sep. 30, 2020

Revenues [Abstract]

Disaggregation of revenue


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Residential:
High-speed internet	$	5,198	$	4,721	$	15,199	$	13,961
Video	5,421		5,541		16,468		16,763
Voice	876		963		2,652		2,935
Wireless	400		326		1,069		795
Business services	2,049		1,971		6,096		5,795
Advertising	674		603		1,659		1,766
Other	382		459		1,203		1,299
Total Cable Communications(a)	15,000		14,584		44,346		43,314

Distribution	1,617		1,681		4,780		5,123
Advertising	793		809		2,306		2,592
Content licensing and other	326		281		1,024		871
Total Cable Networks	2,736		2,771		8,110		8,586

Advertising	1,054		1,191		3,331		3,837
Content licensing	740		447		2,224		1,479
Distribution and other	620		592		1,907		1,783
Total Broadcast Television	2,414		2,230		7,462		7,099

Theatrical	29		549		354		1,246
Content licensing	844		737		2,385		2,266
Home entertainment	278		185		678		681
Other	129		235		427		738
Total Filmed Entertainment	1,280		1,706		3,844		4,931

Total Theme Parks	311		1,631		1,267		4,371
Headquarters and Other	32		21		79		60
Eliminations(b)	(49)		(64)		(180)		(233)
Total NBCUniversal	6,724		8,295		20,582		24,814

Direct-to-consumer	3,943		3,793		11,146		11,516
Content	388		315		947		1,061
Advertising	462		446		1,296		1,602
Total Sky	4,793		4,554		13,389		14,179

Corporate and Other	84		42		250		206
Eliminations(b)	(1,069)		(648)		(2,711)		(1,969)
Total revenue	$	25,532	$	26,827	$	75,856	$	80,544

(a)For both the three and nine months ended September 30, 2020 and 2019, 2.6% of Cable Communications segment revenue was derived from franchise and other regulatory fees.

(b)Included in Eliminations are transactions that our segments enter into with one another. See Note 2 for a description of these transactions.

We operate primarily in the United States but also in select international markets. The table below summarizes revenue by geographic location.


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
United States	$	19,680	$	20,398	$	59,026	$	61,394
Europe	5,196		5,211		14,850		15,878
Other	656		1,218		1,980		3,272
Total revenue	$	25,532	$	26,827	$	75,856	$	80,544

Schedule of receivables, net


(in millions)	September 30, 2020		December 31, 2019
Receivables, gross	$	11,110	$	11,711
Less: Allowance for doubtful accounts	800		419
Receivables, net	$	10,310	$	11,292

Other balance sheet accounts


(in millions)	September 30, 2020		December 31, 2019
Noncurrent receivables, net (included in other noncurrent assets, net)	$	1,138	$	1,337
Contract acquisition and fulfillment costs (included in other noncurrent assets, net)	$	1,043	$	1,083
Noncurrent deferred revenue (included in other noncurrent liabilities)	$	698	$	618

Programming and Production Costs (Tables)

9 Months Ended

Sep. 30, 2020

Other Industries [Abstract]

Amortization of Film and Television Costs


(in millions)	Three Months Ended September 30, 2020		Nine Months Ended September 30, 2020
Owned film and television costs	$	1,556	$	4,883

Programming rights	$	3,526	$	7,774

Capitalized Film and Television Costs and Programming Rights

Capitalized Film and Television Costs


	September 30, 2020		December 31, 2019
(in millions)	Film and Television Costs		Film Costs		Television Costs		Total
Owned film and television costs:
Released, less amortization	$	3,578	$	1,551	$	2,810	$	4,361
Completed, not released	147		187		—		187
In production and in development	2,608		1,314		1,162		2,476
	6,333		3,052		3,972		7,024
Programming rights, less amortization	6,408						5,786
	12,741						12,810
Less: Current portion of programming rights	—						3,877
Film and television costs	$	12,741					$	8,933

Estimated Future Amortization Expense for Capitalized Film and Television Costs and Programming Rights

The table below summarizes estimated future amortization expense for the capitalized film and television costs recorded in our condensed consolidated balance sheet as of September 30, 2020.


(in millions)	Owned Film and Television Costs		Programming Rights
Completed, not released:
Remaining three months of 2020	$	20

Released and programming rights:
Remaining three months of 2020	$	440	$	1,739
2021	$	901	$	2,846
2022	$	463	$	760

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Computation of diluted EPS

Computation of Diluted EPS


	Three Months Ended September 30,
	2020					2019
(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	$	2,019	4,577	$	0.44	$	3,217	4,551	$	0.71
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock plans			51					68
Diluted EPS attributable to Comcast Corporation shareholders	$	2,019	4,628	$	0.44	$	3,217	4,619	$	0.70


	Nine Months Ended September 30,
	2020					2019
(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	$	7,154	4,571	$	1.57	$	9,895	4,544	$	2.18
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock plans			45					62
Diluted EPS attributable to Comcast Corporation shareholders	$	7,154	4,616	$	1.55	$	9,895	4,606	$	2.15

Investments (Tables)

9 Months Ended

Sep. 30, 2020

Investments [Abstract]

Investment and Other Income (Loss), Net


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Equity in net income (losses) of investees, net	$	(266)	$	(355)	$	(634)	$	(295)
Realized and unrealized gains (losses) on equity securities, net	118		174		65		582
Other income (loss), net	62		71		187		224
Investment and other income (loss), net	$	(86)	$	(110)	$	(382)	$	511

Investment Summary


(in millions)	September 30, 2020		December 31, 2019
Equity method	$	5,097	$	5,347
Marketable equity securities	141		353
Nonmarketable equity securities	1,833		1,896
Other investments	138		1,796
Total investments	7,209		9,392
Less: Current investments	78		1,709
Less: Investment securing collateralized obligation	429		694
Noncurrent investments	$	6,702	$	6,989

Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Summary of Intangible Assets


		September 30, 2020				December 31, 2019
(in millions)	Weighted-Average Original Useful Life as of September 30, 2020	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Indefinite-Lived Intangible Assets:
Franchise rights	N/A	$	59,365			$	59,365
Trade names	N/A	—				8,809
FCC licenses	N/A	2,345				2,337
Finite-Lived Intangible Assets:
Customer relationships	14 years	21,665		$	(8,363)	22,884		$	(8,295)
Software	5 years	16,770		(8,786)		15,357		(7,287)
Other agreements and rights	28 years	12,110		(1,256)		3,958		(1,635)
Total		$	112,255	$	(18,405)	$	112,710	$	(17,217)

Amortization of Intangible Assets

Estimated Amortization Expense of Finite-Lived Intangible Assets


(in millions)
Remaining three months of 2020	$	1,190
2021	$	4,443
2022	$	3,868
2023	$	3,209
2024	$	2,524

Supplemental Financial Information (Tables)

9 Months Ended

Sep. 30, 2020

Supplemental Financial Information [Abstract]

Schedule of recognized share-based compensation expense

Recognized Share-Based Compensation Expense


	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Restricted share units	$	164	$	143	$	484	$	437
Stock options	72		57		226		176
Employee stock purchase plans	9		8		30		23
Total	$	245	$	208	$	740	$	636

Schedule of cash payments for interest and income taxes

Cash Payments for Interest and Income Taxes


	Nine Months Ended September 30,
(in millions)	2020		2019
Interest	$	2,845	$	3,167
Income taxes	$	2,298	$	2,490

Schedule of cash, cash equivalents and restricted cash


(in millions)	September 30, 2020		December 31, 2019
Cash and cash equivalents	$	13,707	$	5,500
Restricted cash included in other current assets	11		42
Restricted cash included in other noncurrent assets, net	19		47
Cash, cash equivalents and restricted cash, end of period	$	13,737	$	5,589

Schedule of accumulated other comprehensive income (loss)

Accumulated Other Comprehensive Income (Loss)


(in millions)	September 30, 2020		September 30, 2019
Unrealized gains (losses) on marketable securities	$	5	$	7
Deferred gains (losses) on cash flow hedges	(68)		162
Unrecognized gains (losses) on employee benefit obligations	241		301
Cumulative translation adjustments	34		(1,629)
Accumulated other comprehensive income (loss), net of deferred taxes	$	212	$	(1,159)

Segment Information (Details) $ in Millions	3 Months Ended		9 Months Ended
Segment Information (Details) $ in Millions	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment			6
Financial Data by Business Segment
Revenue	$ 25,532	$ 26,827	$ 75,856	$ 80,544
Adjusted EBITDA	7,583	8,553	23,640	25,822
Depreciation and Amortization	3,320	3,180	9,848	9,776
Capital Expenditures	2,387	2,511	6,344	6,866
Cash Paid for Intangible Assets	552	608	1,771	1,686
Eliminations [Member]
Financial Data by Business Segment
Revenue	(1,069)	(648)	(2,711)	(1,969)
Adjusted EBITDA	(128)	(1)	(250)	(10)
Depreciation and Amortization	0	0	0	0
Capital Expenditures	0	0	0	0
Cash Paid for Intangible Assets	0	0	0	0
Cable Communications [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	15,000	14,584	44,346	43,314
Adjusted EBITDA	6,411	5,801	18,663	17,383
Depreciation and Amortization	1,952	1,967	5,835	6,038
Capital Expenditures	1,770	1,814	4,491	4,771
Cash Paid for Intangible Assets	296	336	978	962
Cable Networks [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	2,736	2,771	8,110	8,586
Adjusted EBITDA	870	955	3,361	3,418
Depreciation and Amortization	191	184	576	549
Capital Expenditures	6	9	16	21
Cash Paid for Intangible Assets	3	4	11	10
Broadcast Television [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	2,414	2,230	7,462	7,099
Adjusted EBITDA	436	338	1,578	1,259
Depreciation and Amortization	38	36	120	115
Capital Expenditures	13	36	58	86
Cash Paid for Intangible Assets	7	3	12	9
Filmed Entertainment [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	1,280	1,706	3,844	4,931
Adjusted EBITDA	300	195	634	742
Depreciation and Amortization	26	21	71	60
Capital Expenditures	2	5	9	13
Cash Paid for Intangible Assets	4	5	14	16
Theme Parks [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	311	1,631	1,267	4,371
Adjusted EBITDA	(203)	731	(526)	1,819
Depreciation and Amortization	208	182	590	514
Capital Expenditures	306	400	897	1,172
Cash Paid for Intangible Assets	11	8	42	44
Headquarters and Other [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	32	21	79	60
Adjusted EBITDA	(121)	(130)	(381)	(486)
Depreciation and Amortization	113	114	358	341
Capital Expenditures	30	55	129	139
Cash Paid for Intangible Assets	28	43	107	120
NBCUniversal Segments [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	6,724	8,295	20,582	24,814
Adjusted EBITDA	1,281	2,091	4,666	6,752
Depreciation and Amortization	576	537	1,715	1,579
Capital Expenditures	357	505	1,109	1,431
Cash Paid for Intangible Assets	53	63	186	199
NBCUniversal Segments [Member] \| Eliminations [Member]
Financial Data by Business Segment
Revenue	(49)	(64)	(180)	(233)
Adjusted EBITDA	(1)	2	0	0
Depreciation and Amortization	0	0	0	0
Capital Expenditures	0	0	0	0
Cash Paid for Intangible Assets	0	0	0	0
Sky Limited [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	4,793	4,554	13,389	14,179
Adjusted EBITDA	515	899	1,815	2,334
Depreciation and Amortization	750	644	2,188	2,058
Capital Expenditures	237	104	649	540
Cash Paid for Intangible Assets	176	188	512	491
Corporate and Other [Member] \| Operating Segments [Member]
Financial Data by Business Segment
Revenue	84	42	250	206
Adjusted EBITDA	(496)	(237)	(1,254)	(637)
Depreciation and Amortization	42	32	110	101
Capital Expenditures	23	88	95	124
Cash Paid for Intangible Assets	$ 27	$ 21	$ 95	$ 34

Segment Information (Reconciliation of Adjusted EBITDA from Segment to Consolidated Statements) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Adjusted EBITDA	$ 7,583	$ 8,553	$ 23,640	$ 25,822
Adjustment for potential legal settlement	(177)	0	(177)	0
Adjustment for Sky transaction-related costs	(10)	(33)	(40)	(168)
Depreciation	(2,122)	(2,124)	(6,328)	(6,561)
Amortization	(1,198)	(1,056)	(3,520)	(3,215)
Interest expense	(1,220)	(1,167)	(3,544)	(3,454)
Investment and other income (loss), net	(86)	(110)	(382)	511
Income before income taxes	$ 2,770	$ 4,063	$ 9,649	$ 12,935

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (c)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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+ Details

Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Revenue (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 25,532	$ 26,827	$ 75,856	$ 80,544
Cable Communications [Member] \| Franchise And Other Regulatory Fees [Member]
Disaggregation of Revenue [Line Items]
Cable segment revenue types as percentage of total cable revenue	2.60%	2.60%	2.60%	2.60%
Operating Segments [Member] \| Cable Communications [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 15,000	$ 14,584	$ 44,346	$ 43,314
Operating Segments [Member] \| Cable Communications [Member] \| Residential, High-Speed Internet [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,198	4,721	15,199	13,961
Operating Segments [Member] \| Cable Communications [Member] \| Residential, Video [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,421	5,541	16,468	16,763
Operating Segments [Member] \| Cable Communications [Member] \| Residential, Voice [Member]
Disaggregation of Revenue [Line Items]
Revenue	876	963	2,652	2,935
Operating Segments [Member] \| Cable Communications [Member] \| Residential, Wireless [Member]
Disaggregation of Revenue [Line Items]
Revenue	400	326	1,069	795
Operating Segments [Member] \| Cable Communications [Member] \| Business Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,049	1,971	6,096	5,795
Operating Segments [Member] \| Cable Communications [Member] \| Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	674	603	1,659	1,766
Operating Segments [Member] \| Cable Communications [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	382	459	1,203	1,299
Operating Segments [Member] \| Cable Networks [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,736	2,771	8,110	8,586
Operating Segments [Member] \| Cable Networks [Member] \| Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,617	1,681	4,780	5,123
Operating Segments [Member] \| Cable Networks [Member] \| Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	793	809	2,306	2,592
Operating Segments [Member] \| Cable Networks [Member] \| Content Licensing And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	326	281	1,024	871
Operating Segments [Member] \| Broadcast Television [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,414	2,230	7,462	7,099
Operating Segments [Member] \| Broadcast Television [Member] \| Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,054	1,191	3,331	3,837
Operating Segments [Member] \| Broadcast Television [Member] \| Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenue	740	447	2,224	1,479
Operating Segments [Member] \| Broadcast Television [Member] \| Distribution And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	620	592	1,907	1,783
Operating Segments [Member] \| Filmed Entertainment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,280	1,706	3,844	4,931
Operating Segments [Member] \| Filmed Entertainment [Member] \| Theatrical [Member]
Disaggregation of Revenue [Line Items]
Revenue	29	549	354	1,246
Operating Segments [Member] \| Filmed Entertainment [Member] \| Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenue	844	737	2,385	2,266
Operating Segments [Member] \| Filmed Entertainment [Member] \| Home Entertainment [Member]
Disaggregation of Revenue [Line Items]
Revenue	278	185	678	681
Operating Segments [Member] \| Filmed Entertainment [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	129	235	427	738
Operating Segments [Member] \| Theme Parks [Member]
Disaggregation of Revenue [Line Items]
Revenue	311	1,631	1,267	4,371
Operating Segments [Member] \| NBCUniversal Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,724	8,295	20,582	24,814
Operating Segments [Member] \| Headquarters and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	32	21	79	60
Operating Segments [Member] \| Sky Limited [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,793	4,554	13,389	14,179
Operating Segments [Member] \| Sky Limited [Member] \| Direct To Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,943	3,793	11,146	11,516
Operating Segments [Member] \| Sky Limited [Member] \| Content [Member]
Disaggregation of Revenue [Line Items]
Revenue	388	315	947	1,061
Operating Segments [Member] \| Sky Limited [Member] \| Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	462	446	1,296	1,602
Operating Segments [Member] \| Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	84	42	250	206
Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,069)	(648)	(2,711)	(1,969)
Eliminations [Member] \| NBCUniversal Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ (49)	$ (64)	$ (180)	$ (233)

Revenue (Revenue by Geographic Location) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 25,532	$ 26,827	$ 75,856	$ 80,544
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	19,680	20,398	59,026	61,394
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,196	5,211	14,850	15,878
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 656	$ 1,218	$ 1,980	$ 3,272

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
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+ Details

Revenue (Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Revenues [Abstract]
Receivables, gross	$ 11,110	$ 11,711
Less: Allowance for doubtful accounts	800	419
Receivables, net	10,310	11,292
Noncurrent receivables, net (included in other noncurrent assets, net)	1,138	1,337
Contract acquisition and fulfillment costs (included in other noncurrent assets, net)	1,043	1,083
Noncurrent deferred revenue (included in other noncurrent liabilities)	$ 698	$ 618

Programming and Production Costs (Recognized Programming and Production Costs) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Other Industries [Abstract]
Owned film and television costs	$ 1,556	$ 4,883
Programming rights	$ 3,526	$ 7,774

Programming and Production Costs (Capitalized Film and Television Costs and Programming Rights) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Film and Television Costs
Released, less amortization	$ 3,578
Completed, not released	147
In production and in development	2,608
Film and Television Costs	6,333
Programming rights, less amortization	6,408
Total film and television costs and programming rights	12,741
Less: Current portion of programming rights	0
Film and television costs	$ 12,741
Film Costs
Released, less amortization		$ 1,551
Completed, not released		187
In production and in development		1,314
Film Costs		3,052
Television Costs
Released, less amortization		2,810
Completed, not released		0
In production and in development		1,162
Television Costs		3,972
Total
Released, less amortization		4,361
Completed, not released		187
In production and in development		2,476
Total		7,024
Programming rights, less amortization		5,786
Total film and television costs and programming rights		12,810
Less: Current portion of programming rights		3,877
Film and television costs		$ 8,933

Programming and Production Costs (Estimated Future Amortization Expense for Capitalized Film and Television Costs and Programming Rights) (Details) $ in Millions	Sep. 30, 2020 USD ($)
Completed, not released:
Remaining three months of 2020	$ 20
Released and programming rights:
Remaining three months of 2020	440
2021	901
2022	463
Released and programming rights:
Remaining three months of 2020	1,739
2021	2,846
2022	$ 760

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net Income Attributable to Comcast Corporation	$ 2,019	$ 3,217	$ 7,154	$ 9,895
Basic EPS attributable to Comcast Corporation shareholders (in shares)	4,577	4,551	4,571	4,544
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.44	$ 0.71	$ 1.57	$ 2.18
Effect of dilutive securities:
Net Income Attributable to Comcast Corporation	$ 2,019	$ 3,217	$ 7,154	$ 9,895
Assumed exercise or issuance of shares relating to stock plans (in shares)	51	68	45	62
Diluted EPS attributable to Comcast Corporation shareholders (in shares)	4,628	4,619	4,616	4,606
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.44	$ 0.70	$ 1.55	$ 2.15

- Definition

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

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+ Details

Long-Term Debt (Narrative) (Details) $ in Billions	Sep. 30, 2020 USD ($)
Debt Disclosure [Abstract]
Total carrying value of debt	$ 104.4
Total fair value of debt	$ 124.2

Significant Transactions (Universal Beijing Resort) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Consolidated variable interest entity's assets included in condensed consolidated balance sheet	$ 268,940	$ 263,414
Universal Beijing Resort [Member] \| Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Ownership percentage in variable interest entity	30.00%
Consolidated variable interest entity's assets included in condensed consolidated balance sheet	$ 4,500
Consolidated variable interest entity's liabilities included in condensed consolidated balance sheet	3,000
Universal Beijing Resort [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Universal Beijing Resort Term Loans [Member]
Variable Interest Entity [Line Items]
Principal amount of term loan outstanding	$ 2,100

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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+ Details

- Definition

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

+ References

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+ Details

Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effects of adoption of accounting standards	$ (87,571)			$ (83,874)	$ (79,160)
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effects of adoption of accounting standards	$ (54,254)	$ (53,420)		(50,695)	$ (48,570)	$ (46,425)	$ (41,983)
Cumulative Effect, Period of Adoption, Adjustment [Member] \| Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effects of adoption of accounting standards		$ 0		$ 124		$ 0	$ 0
Cumulative Effect, Period of Adoption, Adjustment [Member] \| Retained Earnings [Member] \| Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effects of adoption of accounting standards			$ 124

- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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+ Details

Investments (Investment and Other Income (Loss), Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments [Abstract]
Equity in net income (losses) of investees, net	$ (266)	$ (355)	$ (634)	$ (295)
Realized and unrealized gains (losses) on equity securities, net	118	174	65	582
Other income (loss), net	62	71	187	224
Investment and other income (loss), net	$ (86)	$ (110)	$ (382)	$ 511

Investments (Schedule of Investments) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Investments [Abstract]
Equity method	$ 5,097	$ 5,347
Marketable equity securities	141	353
Nonmarketable equity securities	1,833	1,896
Other investments	138	1,796
Total investments	7,209	9,392
Less: Current investments	78	1,709
Less: Investment securing collateralized obligation	429	694
Noncurrent investments	$ 6,702	$ 6,989

Investments (Equity Method Investments) (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net	$ (266,000,000)	$ (355,000,000)		$ (634,000,000)	$ (295,000,000)
Equity method investment	5,097,000,000			5,097,000,000		$ 5,347,000,000
Investment securing collateralized obligation	429,000,000			429,000,000		694,000,000
Proceeds from collateralized obligation				0	5,175,000,000	5,200,000,000
Collateralized obligation	5,167,000,000			5,167,000,000		5,166,000,000
Atairos [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net	(107,000,000)	(262,000,000)		(242,000,000)	6,000,000
Cash capital contributions for equity method investments				184,000,000	475,000,000
Equity method investment	3,300,000,000			3,300,000,000		3,200,000,000
Hulu [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net	(104,000,000)	$ (101,000,000)		(265,000,000)	(351,000,000)
Recognition of previously deferred gain			$ 159,000,000
Cash capital contributions for equity method investments				0	$ 903,000,000
Investment securing collateralized obligation	429,000,000			429,000,000		$ 694,000,000
Hulu [Member] \| AT&T, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		10.00%			10.00%
Level 2 [Member]
Schedule of Equity Method Investments [Line Items]
Fair value of collateralized obligation	$ 5,200,000,000			$ 5,200,000,000

Investments (Marketable Equity Securities) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities					$ 141	$ 353
Peloton [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities, recognized unrealized gains (losses)	$ 150
Marketable equity securities, recognized realized gains (losses)		$ 67
Marketable equity securities						$ 294
Snap [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities, recognized unrealized gains (losses)			$ 45	$ 303

Investments (Other Investments) (Details) $ in Billions	1 Months Ended
Investments (Other Investments) (Details) $ in Billions	Apr. 30, 2020 USD ($) preferred_stock_series	Dec. 31, 2019 USD ($)
Schedule of Other Investments [Line Items]
Cash payments for the redemption of redeemable preferred shares	$ 1.8
Air Touch [Member]
Schedule of Other Investments [Line Items]
Number of series of preferred stock \| preferred_stock_series	3
Redeemable subsidiary preferred shares		$ 1.7
Air Touch [Member]
Schedule of Other Investments [Line Items]
Number of series of preferred stock \| preferred_stock_series	2
Cash payments received upon redemption of preferred stock	$ 1.7
Held to maturity investment		$ 1.6

Intangible Assets (Summary of Intangible Assets) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (18,405)	$ (17,217)
Total	112,255	112,710
Franchise Rights [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	59,365	59,365
Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	0	8,809
FCC Licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,345	2,337
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	14 years
Gross Carrying Amount	$ 21,665	22,884
Accumulated Amortization	$ (8,363)	(8,295)
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	5 years
Gross Carrying Amount	$ 16,770	15,357
Accumulated Amortization	$ (8,786)	(7,287)
Other Agreements and Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	28 years
Gross Carrying Amount	$ 12,110	3,958
Accumulated Amortization	$ (1,256)	$ (1,635)

Intangible Assets (Amortization of Intangible Assets) (Details) $ in Millions	Sep. 30, 2020 USD ($)
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Remaining three months of 2020	$ 1,190
2021	4,443
2022	3,868
2023	3,209
2024	$ 2,524

Supplemental Financial Information (Share-Based Compensation) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		$ 245	$ 208	$ 740	$ 636
Restricted share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		164	143	484	437
Unrecognized pretax compensation expense on nonvested awards		1,300		1,300
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		72	57	226	176
Unrecognized pretax compensation expense on nonvested awards		615		615
Employee stock purchase plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		$ 9	$ 8	$ 30	$ 23
Management Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted (in shares)	59.9
Weighted-average fair value of stock options granted (in dollars per share)	$ 6.53
Management Grant [Member] \| Restricted share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted share units granted (in shares)	15.8
Weighted-average fair value of restricted share units granted (in dollars per share)	$ 42.47

Supplemental Financial Information (Cash Payments for Interest and Income Taxes) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Payments for Interest and Income Taxes
Interest	$ 2,845	$ 3,167
Income taxes	$ 2,298	$ 2,490

Supplemental Financial Information (Noncash Activities) (Details) $ / shares in Units, $ in Billions	9 Months Ended
	Sep. 30, 2020 USD ($) $ / shares
Supplemental Financial Information [Abstract]
Property and equipment and intangible assets accrued but not yet paid	$ 1.9
Dividends payable	$ 1.1
Dividends payable (in dollars per share) \| $ / shares	$ 0.23

Supplemental Financial Information (Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Supplemental Financial Information [Abstract]
Cash and cash equivalents	$ 13,707	$ 5,500
Restricted cash included in other current assets	11	42
Restricted cash included in other noncurrent assets, net	19	47
Cash, cash equivalents and restricted cash, end of period	$ 13,737	$ 5,589	$ 3,602	$ 3,909

Supplemental Financial Information (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Supplemental Financial Information [Abstract]
Unrealized gains (losses) on marketable securities	$ 5		$ 7
Deferred gains (losses) on cash flow hedges	(68)		162
Unrecognized gains (losses) on employee benefit obligations	241		301
Cumulative translation adjustments	34		(1,629)
Accumulated other comprehensive income (loss), net of deferred taxes	$ 212	$ 1,047	$ (1,159)

- 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 + Details

Commitments and Contingencies (Narrative) (Details) $ in Millions	Sep. 30, 2020 USD ($)
NBCUniversal Enterprise [Member] \| Redeemable Subsidiary Preferred Stock [Member] \| Level 2 [Member]
Commitments And Contingencies [Line Items]
Temporary equity, fair value of redeemable subsidiary preferred stock	$ 731