Comcast (CMCSA) 10-Q 24 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2019shares
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, 2019
Document Transition Report	false
Amendment Flag	false
Document Fiscal Year Focus	2019
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
NBCUniversal Media LLC [Member]
Document And Entity Information [Line Items]
Entity File Number	001-36438
Entity Registrant Name	NBCUNIVERSAL MEDIA, LLC
Entity Central Index Key	0000902739
Entity Tax Identification Number	14-1682529
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	30 Rockefeller Plaza
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10112-0015
City Area Code	212
Local Phone Number	664-4444
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-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	4,539,805,879
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
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
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
Class B Common Stock [Member]
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	9,444,375

Condensed Consolidated Statemen

Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue	$ 26,827	$ 22,135	$ 80,544	$ 66,661
Costs and Expenses:
Programming and production	8,316	6,711	25,140	20,440
Other operating and administrative	8,090	6,444	24,076	19,323
Advertising, marketing and promotion	1,901	1,667	5,674	4,924
Depreciation	2,124	2,038	6,561	6,070
Amortization	1,056	580	3,215	1,750
Other operating gains	0	(141)	0	(341)
Total costs and expenses	21,487	17,299	64,666	52,166
Operating income (loss)	5,340	4,836	15,878	14,495
Interest expense	(1,167)	(830)	(3,454)	(2,413)
Investment and other income (loss), net	(110)	(111)	511	92
Income (loss) before income taxes	4,063	3,895	12,935	12,174
Income tax expense	(775)	(999)	(2,812)	(2,894)
Net income (loss)	3,288	2,896	10,123	9,280
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	71	10	228	60
Net income (loss) attributable to Comcast Corporation	$ 3,217	$ 2,886	$ 9,895	$ 9,220
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.71	$ 0.63	$ 2.18	$ 2
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.70	$ 0.62	$ 2.15	$ 1.98
NBCUniversal Media LLC [Member]
Revenue	$ 8,294	$ 8,625	$ 24,866	$ 26,468
Costs and Expenses:
Programming and production	3,531	3,896	10,182	11,947
Other operating and administrative	2,013	1,959	5,943	5,886
Advertising, marketing and promotion	661	704	1,994	2,124
Depreciation	259	250	755	750
Amortization	278	264	824	827
Other operating gains	0	(141)	0	(141)
Total costs and expenses	6,742	6,932	19,698	21,393
Operating income (loss)	1,552	1,693	5,168	5,075
Interest expense	(348)	(134)	(601)	(394)
Investment and other income (loss), net	169	(205)	449	(377)
Income (loss) before income taxes	1,373	1,354	5,016	4,304
Income tax expense	(63)	(112)	(239)	(291)
Net income (loss)	1,310	1,242	4,777	4,013
Less: Net income (loss) attributable to noncontrolling interests	54	11	166	22
Net income (loss) attributable to Comcast Corporation	$ 1,256	$ 1,231	$ 4,611	$ 3,991

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 3,288	$ 2,896	$ 10,123	$ 9,280
Unrealized gains (losses) on marketable securities, net of deferred taxes	2	2	4	0
Deferred gains (losses) on cash flow hedges, net of deferred taxes	82	(15)	146	(26)
Amounts reclassified to net income:
Realized (gains) losses on cash flow hedges, net of deferred taxes	(52)	17	(39)	43
Employee benefit obligations, net of deferred taxes	(8)	(8)	(24)	(24)
Currency translation adjustments, net of deferred taxes	(1,144)	(103)	(903)	(119)
Comprehensive income	2,168	2,789	9,307	9,154
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	71	10	228	60
Less: Other comprehensive income (loss) attributable to noncontrolling interests	(23)	(20)	(25)	(45)
Comprehensive income (loss) attributable to Comcast Corporation	2,120	2,799	9,104	9,139
NBCUniversal Media LLC [Member]
Net income	1,310	1,242	4,777	4,013
Deferred gains (losses) on cash flow hedges, net of deferred taxes	0	(2)	(3)	(4)
Amounts reclassified to net income:
Employee benefit obligations, net of deferred taxes	(4)	(4)	(9)	(11)
Currency translation adjustments, net of deferred taxes	(31)	(133)	16	(144)
Comprehensive income	1,275	1,103	4,781	3,854
Less: Net income (loss) attributable to noncontrolling interests	54	11	166	22
Less: Other comprehensive income (loss) attributable to noncontrolling interests	(23)	(20)	(25)	(45)
Comprehensive income (loss) attributable to Comcast Corporation	$ 1,244	$ 1,112	$ 4,640	$ 3,877

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on marketable securities, deferred taxes	$ 0	$ (1)	$ 0	$ (1)
Deferred gains (losses) on cash flow hedges, deferred taxes	(35)	5	(24)	8
Realized (gains) losses on cash flow hedges, deferred taxes	11	(5)	7	(13)
Employee benefit obligations, deferred taxes	3	2	8	7
Currency translation adjustments, deferred taxes	$ (80)	$ 25	$ (98)	$ 22

Condensed Consolidated Statem_4

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net income	$ 10,123	$ 9,280
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other operating gains	9,776	7,479
Share-based compensation	790	607
Noncash interest expense (income), net	310	289
Net (gain) loss on investment activity and other	(166)	118
Deferred income taxes	468	877
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Current and noncurrent receivables, net	360	(225)
Film and television costs, net	(321)	64
Accounts payable and accrued expenses related to trade creditors	(1,149)	(85)
Other operating assets and liabilities	(729)	103
Net cash provided by operating activities	19,462	18,507
Investing Activities
Capital expenditures	(6,866)	(6,607)
Cash paid for intangible assets	(1,686)	(1,375)
Acquisitions and construction of real estate properties	(40)	(129)
Construction of Universal Beijing Resort	(736)	(257)
Acquisitions, net of cash acquired	(181)	(88)
Proceeds from sales of businesses and investments	208	127
Purchases of investments	(1,697)	(840)
Other	86	579
Net cash provided by (used in) investing activities	(10,912)	(8,590)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net	(1,288)	2,909
Proceeds from borrowings	516	9,850
Proceeds from collateralized obligation	5,175	0
Repurchases and repayments of debt	(9,975)	(4,405)
Repurchases of common stock under repurchase program and employee plans	(432)	(4,282)
Dividends paid	(2,778)	(2,487)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock	(235)	(209)
Other	191	(242)
Net cash provided by (used in) financing activities	(8,826)	1,134
Impact of foreign currency on cash, cash equivalents and restricted cash	(31)	0
Increase (decrease) in cash, cash equivalents and restricted cash	(307)	11,051
Cash, cash equivalents and restricted cash, beginning of period	3,909	3,571
Cash, cash equivalents and restricted cash, end of period	3,602	14,622
NBCUniversal Media LLC [Member]
Operating Activities
Net income	4,777	4,013
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,579	1,436
Net (gain) loss on investment activity and other	(12)	497
Deferred income taxes	(13)	21
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Current and noncurrent receivables, net	284	90
Film and television costs, net	(656)	69
Accounts payable and accrued expenses related to trade creditors	(180)	(123)
Other operating assets and liabilities	(367)	(165)
Net cash provided by operating activities	5,412	5,838
Investing Activities
Capital expenditures	(1,431)	(1,135)
Cash paid for intangible assets	(199)	(374)
Note receivable from Comcast	(3,238)	(1,522)
Construction of Universal Beijing Resort	(736)	(257)
Purchases of investments	(1,017)	(450)
Other	(5)	(45)
Net cash provided by (used in) investing activities	(6,626)	(3,783)
Financing Activities
Proceeds from borrowings	572	485
Proceeds from collateralized obligation	5,175	0
Repurchases and repayments of debt	(2,739)	(387)
Proceeds from (repayments of) borrowings from Comcast, net	(79)	(1,791)
Distributions to member	(1,775)	(1,228)
Distributions to noncontrolling interests	(183)	(163)
Other	(44)	(147)
Net cash provided by (used in) financing activities	927	(3,231)
Increase (decrease) in cash, cash equivalents and restricted cash	(287)	(1,176)
Cash, cash equivalents and restricted cash, beginning of period	1,464	2,377
Cash, cash equivalents and restricted cash, end of period	$ 1,177	$ 1,201

Condensed Consolidated Balance

Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 3,507	$ 3,814
Receivables, net	10,684	11,104
Programming rights	3,457	3,746
Other current assets	4,675	3,184
Total current assets	22,323	21,848
Film and television costs	8,647	7,837
Investments	7,473	7,883
Investment securing collateralized obligation	816	0
Property and equipment, net	46,790	44,437
Franchise rights	59,365	59,365
Goodwill	66,913	66,154
Other intangible assets, net	35,164	38,358
Other noncurrent assets, net	8,883	5,802
Total assets	256,374	251,684
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	10,198	8,494
Accrued participations and residuals	1,615	1,808
Deferred revenue	2,944	2,182
Accrued expenses and other current liabilities	10,193	10,721
Current portion of long-term debt	1,039	4,398
Total current liabilities	25,989	27,603
Long-term debt, less current portion	99,847	107,345
Collateralized obligation	5,165	0
Deferred income taxes	27,992	27,589
Other noncurrent liabilities	16,853	15,329
Commitments and contingencies (Note 12)
Redeemable noncontrolling interests	1,368	1,316
Equity:
Preferred stock—authorized, 20,000,000 shares; issued, zero	0	0
Common stock	54	54
Additional paid-in capital	38,196	37,461
Retained earnings	48,570	41,983
Treasury stock, 872,791,028 Class A common shares	(7,517)	(7,517)
Accumulated other comprehensive income (loss)	(1,159)	(368)
Total Comcast Corporation shareholders’ equity	78,144	71,613
Noncontrolling interests	1,016	889
Total equity	79,160	72,502
Total liabilities and equity	256,374	251,684
NBCUniversal Media LLC [Member]
Current Assets:
Cash and cash equivalents	1,157	1,444
Receivables, net	7,040	7,293
Programming rights	1,461	1,323
Notes receivable from Comcast	4,192	2,054
Other current assets	1,126	1,133
Total current assets	14,976	13,247
Film and television costs	7,776	7,292
Investments	1,993	1,680
Investment securing collateralized obligation	816	0
Note receivable from Comcast	1,101	0
Property and equipment, net	14,853	13,189
Goodwill	24,128	24,118
Intangible assets, net	13,100	13,666
Other noncurrent assets, net	3,444	1,822
Total assets	82,187	75,014
Current Liabilities:
Accounts payable and accrued expenses related to trade creditors	1,944	1,933
Accrued participations and residuals	1,615	1,808
Program obligations	608	965
Deferred revenue	1,820	1,118
Accrued expenses and other current liabilities	2,052	2,195
Notes payable to Comcast	91	54
Current portion of long-term debt	246	151
Total current liabilities	8,376	8,224
Long-term debt, less current portion	10,574	12,731
Collateralized obligation	5,165	0
Accrued participations, residuals and program obligations	1,674	1,712
Other noncurrent liabilities	6,451	5,177
Commitments and contingencies (Note 12)
Redeemable noncontrolling interests	442	389
Equity:
Member’s capital	48,209	45,618
Accumulated other comprehensive income (loss)	283	254
Total NBCUniversal member’s equity	48,492	45,872
Noncontrolling interests	1,013	909
Total equity	49,505	46,781
Total liabilities and equity	82,187	75,014
Class A Common Stock [Member]
Equity:
Common stock	54	54
Class B Common Stock [Member]
Equity:
Common stock	$ 0	$ 0

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Property and equipment - accumulated depreciation	$ 52,983	$ 51,306
Other intangible assets - accumulated amortization	$ 16,764	$ 14,194
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
NBCUniversal Media LLC [Member]
Property and equipment - accumulated depreciation	$ 5,639	$ 4,994
Other intangible assets - accumulated amortization	$ 9,420	$ 8,590
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)	5,412,596,907	5,389,309,175
Common stock, shares outstanding (in shares)	4,539,805,879	4,516,518,147
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 Statem_5

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]	Treasury Stock at Cost [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	NBCUniversal Media LLC [Member]	NBCUniversal Media LLC [Member]Redeemable Noncontrolling Interest [Member]	NBCUniversal Media LLC [Member]Member's Capital [Member]	NBCUniversal Media LLC [Member]Accumulated Other Comprehensive Income (Loss) [Member]	NBCUniversal Media LLC [Member]Noncontrolling Interest [Member]	Class A Common Stock [Member]Common Stock [Member]
Beginning balance at Dec. 31, 2017		$ 1,357							$ 409
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(42)							(43)
Other		(35)							(5)
Net income (loss)		37							26
Ending balance at Sep. 30, 2018		1,317							387
Beginning balance at Dec. 31, 2017			$ 37,497	$ 38,202	$ (7,517)	$ 379	$ 843						$ 55
Beginning balance at Dec. 31, 2017										$ 42,148	$ (20)	$ 913
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to member										(1,228)
Stock compensation plans			434
Repurchases of common stock under repurchase program and employee plans			(757)	(3,530)									(1)
Employee stock purchase plans			161
Dividends declared				(2,631)
Other comprehensive income (loss)						(81)	(45)				(114)	(45)
Contributions from (distributions to) noncontrolling interests, net							277					272
Other			59	0			(276)			92		(293)
Net income (loss)				9,220			23			3,991		(4)
Ending balance at Sep. 30, 2018	$ 72,345		37,394	41,218	(7,517)	374	822						54
Ending balance at Sep. 30, 2018								$ 45,712		44,771	98	843
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.57
Beginning balance at Jun. 30, 2018		1,343							391
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(11)							(10)
Other		(11)							0
Net income (loss)		(4)							6
Ending balance at Sep. 30, 2018		1,317							387
Beginning balance at Jun. 30, 2018			37,427	40,269	(7,517)	461	1,049						54
Beginning balance at Jun. 30, 2018										43,777	218	1,090
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to member										(238)
Stock compensation plans			144
Repurchases of common stock under repurchase program and employee plans			(228)	(1,064)									0
Employee stock purchase plans			49
Dividends declared				(871)
Other comprehensive income (loss)						(87)	(20)				(120)	(20)
Contributions from (distributions to) noncontrolling interests, net							(40)					(41)
Other			2	(2)			(181)			1		(191)
Net income (loss)				2,886			14			1,231		5
Ending balance at Sep. 30, 2018	$ 72,345		37,394	41,218	(7,517)	374	822						54
Ending balance at Sep. 30, 2018								45,712		44,771	98	843
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.19
Beginning balance at Dec. 31, 2018	$ 1,316	1,316						389	389
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(49)							(51)
Other		(28)							3
Net income (loss)		129							101
Ending balance at Sep. 30, 2019	1,368	1,368						442	442
Beginning balance at Dec. 31, 2018	72,502		37,461	41,983	(7,517)	(368)	889						54
Beginning balance at Dec. 31, 2018								46,781		45,618	254	909
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to member										(2,020)
Stock compensation plans			604
Repurchases of common stock under repurchase program and employee plans			(39)	(406)									0
Employee stock purchase plans			166
Dividends declared				(2,893)
Other comprehensive income (loss)						(791)	(24)				29	(25)
Contributions from (distributions to) noncontrolling interests, net							66					76
Other			4	(9)			(14)			0		(12)
Net income (loss)				9,895			99			4,611		65
Ending balance at Sep. 30, 2019	$ 79,160		38,196	48,570	(7,517)	(1,159)	1,016						54
Ending balance at Sep. 30, 2019								49,505		48,209	283	1,013
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							401
Increase (Decrease) in Temporary Equity [Roll Forward]
Contributions from (distributions to) noncontrolling interests, net		(12)							(13)
Other		(9)							3
Net income (loss)		60							51
Ending balance at Sep. 30, 2019	$ 1,368	$ 1,368						442	$ 442
Beginning balance at Jun. 30, 2019			37,950	46,425	(7,517)	(62)	980						54
Beginning balance at Jun. 30, 2019										47,529	295	988
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions to member										(576)
Stock compensation plans			193
Repurchases of common stock under repurchase program and employee plans			6	(101)									0
Employee stock purchase plans			51
Dividends declared				(965)
Other comprehensive income (loss)						(1,097)	(22)				(12)	(23)
Contributions from (distributions to) noncontrolling interests, net							50					51
Other			(4)	(6)			(3)			0		(6)
Net income (loss)				3,217			11			1,256		3
Ending balance at Sep. 30, 2019	$ 79,160		$ 38,196	$ 48,570	$ (7,517)	$ (1,159)	$ 1,016						$ 54
Ending balance at Sep. 30, 2019								$ 49,505		$ 48,209	$ 283	$ 1,013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in dollars per share)	$ 0.21

Condensed Consolidated Financia

Condensed Consolidated Financial Statements	9 Months Ended
	Sep. 30, 2019
Condensed Consolidated Financial Statements [Line Items]
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 2018 Annual Report on Form 10-K and the notes within this Form 10-Q. In the fourth quarter of 2018, we acquired a 100% interest in Sky through a series of transactions, for total cash consideration of £30.2 billion (approximately $39.4 billion using the exchange rates on the purchase dates). See Note 6 for additional information on the transaction. Reclassifications Reclassifications have been made to our condensed consolidated financial statements for the prior year periods to conform to classifications used in 2019 . See Note 7 for a discussion of the effects of the adoption of new accounting pronouncements on our condensed consolidated financial statements.
NBCUniversal Media LLC [Member]
Condensed Consolidated Financial Statements [Line Items]
Condensed Consolidated Financial Statements	Condensed Consolidated Financial Statements Basis of Presentation Unless indicated otherwise, throughout these notes to the condensed consolidated financial statements, we refer to NBCUniversal and its consolidated subsidiaries as “we,” “us” and “our.” 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 2018 Annual Report on Form 10-K and the notes within this Form 10-Q. See Note 6 for a discussion of the effects of the adoption of new accounting pronouncements on our condensed consolidated financial statements.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting Information [Line Items]
Segment Information	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. Our Cable Communications segment consists of the operations of Comcast Cable, which is one of the nation’s largest providers of high-speed internet, video, voice, wireless, and security and automation services (“cable services”) to residential customers under the Xfinity brand ; we also provide these and other services to business customers and sell advertising. Our Cable Networks segment 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. Our Broadcast Television segment 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. Our Filmed Entertainment segment 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. Our Theme Parks segment consists primarily of our Universal theme parks in Orlando, Florida; Hollywood, California; and Osaka, Japan. In addition, along with a consortium of Chinese state-owned companies, we are developing a Universal theme park and resort in Beijing, China. Our Sky segment consists of the operations of Sky, 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. 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. Beginning in the first quarter of 2019, Comcast Cable’s wireless phone service and certain other Cable-related business development initiatives are now presented in the Cable Communications segment. Results were previously presented in Corporate and Other. Prior periods have been adjusted to reflect this presentation. To be consistent with our current management reporting presentation, certain 2018 operating results were reclassified related to certain NBCUniversal businesses now presented in the Sky segment. Our financial data by business segment is presented in the tables below. Three Months Ended September 30, 2019 (in millions) Revenue Adjusted EBITDA (d) Depreciation and Amortization Capital 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 Three Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (d) Depreciation and Amortization Capital Cash Paid for Intangible Assets Cable Communications $ 14,023 $ 5,434 $ 2,077 $ 1,945 $ 367 NBCUniversal Cable Networks 2,850 959 180 11 6 Broadcast Television 2,452 321 32 37 — Filmed Entertainment 1,819 214 26 9 6 Theme Parks 1,528 725 170 269 23 Headquarters and Other (a) 15 (161 ) 106 79 43 Eliminations (b) (68 ) (1 ) — — — NBCUniversal 8,596 2,057 514 405 78 Corporate and Other (c) 73 (188 ) 27 34 — Eliminations (b) (557 ) 10 — — — Comcast Consolidated $ 22,135 $ 7,313 $ 2,618 $ 2,384 $ 445 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 Nine Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (d) Depreciation and Amortization Capital Expenditures Cash Paid for Intangible Assets Cable Communications $ 41,638 $ 16,100 $ 6,161 $ 5,403 $ 998 NBCUniversal Cable Networks (e) 8,881 3,389 548 22 15 Broadcast Television (e) 8,340 1,245 106 99 75 Filmed Entertainment 5,176 555 117 24 20 Theme Parks 4,170 1,789 492 811 158 Headquarters and Other (a) 44 (497 ) 314 179 106 Eliminations (b)(e) (245 ) (3 ) — — — NBCUniversal 26,366 6,478 1,577 1,135 374 Corporate and Other (c) 412 (566 ) 82 69 3 Eliminations (b)(e) (1,755 ) (38 ) — — — Comcast Consolidated $ 66,661 $ 21,974 $ 7,820 $ 6,607 $ 1,375 (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. The most common types of transactions are the following: • our Cable Networks segment generates revenue by selling programming to our Cable Communications segment, which represents a substantial majority of the revenue elimination amount • our Broadcast Television segment generates revenue from the fees received under retransmission consent agreements with our Cable Communications segment • our Cable Communications segment generates revenue by selling advertising and by selling the use of satellite feeds to our Cable Networks segment • our Cable Networks and Broadcast Television segments generate revenue by selling advertising to our Cable Communications segment • our Filmed Entertainment and Broadcast Television segments generate revenue by licensing content to our Cable Networks segment; for segment reporting, this revenue is recognized as the programming rights asset for the licensed content is amortized based on third party revenue • our Filmed Entertainment, Cable Networks and Broadcast Television segments generate revenue by licensing content to our Sky segment (c) Corporate and Other activities include costs associated with overhead and personnel, revenue and expenses associated with 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 the development of Peacock, NBCUniversal’s direct-to-consumer streaming service. (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 Nine Months Ended (in millions) 2019 2018 2019 2018 Adjusted EBITDA $ 8,553 $ 7,313 $ 25,822 $ 21,974 Adjustment for Sky transaction-related costs (33 ) — (168 ) — Depreciation (2,124 ) (2,038 ) (6,561 ) (6,070 ) Amortization (1,056 ) (580 ) (3,215 ) (1,750 ) Other operating gains — 141 — 341 Interest expense (1,167 ) (830 ) (3,454 ) (2,413 ) Investment and other income (loss), net (110 ) (111 ) 511 92 Income before income taxes $ 4,063 $ 3,895 $ 12,935 $ 12,174 (e) The re venue and operating costs and expenses associated with our broadcast of the 2018 PyeongChang Olympics were reported in our Cable Networks and Broadcast Television segments. The revenue and operating costs and expenses associated with our broadcast of the 2018 Super Bowl were reported in our Broadcast Television segment. Included in Eliminations are transactions relating to these events that our Broadcast Television and Cable Networks segments enter into with our other segments.
NBCUniversal Media LLC [Member]
Segment Reporting Information [Line Items]
Segment Information	Segment Information We present our operations in four reportable business segments: Our Cable Networks segment 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. Our Broadcast Television segment 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. Our Filmed Entertainment segment 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. Our Theme Parks segment consists primarily of our Universal theme parks in Orlando, Florida; Hollywood, California; and Osaka, Japan. In addition, along with a consortium of Chinese state-owned companies, we are developing a Universal theme park and resort in Beijing, China. We use Adjusted EBITDA to evaluate the profitability of our operating segments and the components of net income attributable to NBCUniversal excluded from Adjusted EBITDA are not separately evaluated. To be consistent with our current management reporting presentation, 2018 operating results were reclassified related to certain NBCUniversal businesses now presented in Headquarters and Other. Our financial data by business segment is presented in the tables below. Three Months Ended September 30, 2019 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Cash Paid for Intangible Assets 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 (133 ) 114 55 43 Eliminations (b) (65 ) 3 — — — Total $ 8,294 $ 2,089 $ 537 $ 505 $ 63 Three Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Cash Paid for Intangible Assets Cable Networks $ 2,850 $ 959 $ 180 $ 11 $ 6 Broadcast Television 2,452 321 32 37 — Filmed Entertainment 1,819 214 26 9 6 Theme Parks 1,528 725 170 269 23 Headquarters and Other (a) 49 (152 ) 106 79 43 Eliminations (b) (73 ) (1 ) — — — Total $ 8,625 $ 2,066 $ 514 $ 405 $ 78 Nine Months Ended September 30, 2019 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Expenditures Cash Paid for Intangible Assets 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) 117 (492 ) 341 139 120 Eliminations (b) (238 ) 1 — — — Total $ 24,866 $ 6,747 $ 1,579 $ 1,431 $ 199 Nine Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Expenditures Cash Paid for Intangible Assets Cable Networks (d) $ 8,881 $ 3,389 $ 548 $ 22 $ 15 Broadcast Television (d) 8,340 1,245 106 99 75 Filmed Entertainment 5,176 555 117 24 20 Theme Parks 4,170 1,789 492 811 158 Headquarters and Other (a) 157 (464 ) 314 179 106 Eliminations (b)(d) (256 ) (3 ) — — — Total $ 26,468 $ 6,511 $ 1,577 $ 1,135 $ 374 (a) 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, which consisted primarily of the licensing of film and television content from our Filmed Entertainment and Broadcast Television segments to our Cable Networks segment; for segment reporting, this revenue is recognized as the programming rights asset for the licensed content is amortized based on third party revenue. (c) We use Adjusted EBITDA as the measure of profit or loss for our operating segments. Adjusted EBITDA is defined as net income attributable to NBCUniversal before net income (loss) attributable to noncontrolling interests, 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 Nine Months Ended (in millions) 2019 2018 2019 2018 Adjusted EBITDA $ 2,089 $ 2,066 $ 6,747 $ 6,511 Depreciation (259 ) (250 ) (755 ) (750 ) Amortization (278 ) (264 ) (824 ) (827 ) Other operating gains — 141 — 141 Interest expense (348 ) (134 ) (601 ) (394 ) Investment and other income (loss), net 169 (205 ) 449 (377 ) Income before income taxes $ 1,373 $ 1,354 $ 5,016 $ 4,304 (d) The rev enue and operating costs and expenses associated with our broadcast of the 2018 PyeongChang Olympics were reported in our Cable Networks and Broadcast Television segments. The revenue and operating costs and expenses associated with our broadcast of the 2018 Super Bowl were reported in our Broadcast Television segment. Included in Eliminations are transactions relating to these events that our Broadcast Television and Cable Networks segments entered into with our other segments.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2019
Revenue [Line Items]
Revenue	Revenue Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Residential: High-speed internet $ 4,721 $ 4,321 $ 13,961 $ 12,740 Video 5,541 5,591 16,763 16,878 Voice 963 982 2,935 2,982 Wireless 326 236 795 623 Business services 1,971 1,803 5,795 5,290 Advertising 603 684 1,766 1,932 Other 459 406 1,299 1,193 Total Cable Communications (a)(b) 14,584 14,023 43,314 41,638 Distribution 1,681 1,655 5,123 5,166 Advertising 809 812 2,592 2,718 Content licensing and other 281 383 871 997 Total Cable Networks 2,771 2,850 8,586 8,881 Advertising 1,191 1,355 3,837 5,107 Content licensing 447 538 1,479 1,541 Distribution and other 592 559 1,783 1,692 Total Broadcast Television 2,230 2,452 7,099 8,340 Theatrical 549 601 1,246 1,564 Content licensing 737 719 2,266 2,100 Home entertainment 185 260 681 733 Other 235 239 738 779 Total Filmed Entertainment 1,706 1,819 4,931 5,176 Total Theme Parks 1,631 1,528 4,371 4,170 Headquarters and Other 21 15 60 44 Eliminations (c) (64 ) (68 ) (233 ) (245 ) Total NBCUniversal 8,295 8,596 24,814 26,366 Direct-to-consumer 3,793 — 11,516 — Content 315 — 1,061 — Advertising 446 — 1,602 — Total Sky 4,554 — 14,179 — Corporate and Other (b) 42 73 206 412 Eliminations (c) (648 ) (557 ) (1,969 ) (1,755 ) Total revenue $ 26,827 $ 22,135 $ 80,544 $ 66,661 (a) For both the three and nine months ended September 30, 2019 , 2.6% of Cable Communications segment revenue was derived from franchise and other regulatory fees. For the three and nine months ended September 30, 2018 , 2.6% and 2.7% , respectively, of Cable Communications segment revenue was derived from franchise and other regulatory fees. (b) Comcast Cable’s wireless phone service is now presented in the Cable Communications segment. Results were previously presented in Corporate and Other. We recognize revenue from our wireless phone service as the services are provided, similar to how we recognize revenue for other residential cable services. We recognize revenue from the sale of handsets at the point of sale. (c) 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 Nine Months Ended (in millions) 2019 2018 2019 2018 United States $ 20,398 $ 20,244 $ 61,394 $ 61,060 Europe 5,211 825 15,878 2,345 Other 1,218 1,066 3,272 3,256 Total revenue $ 26,827 $ 22,135 $ 80,544 $ 66,661 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, December 31, Receivables, gross $ 11,159 $ 11,456 Less: Allowance for doubtful accounts 475 352 Receivables, net $ 10,684 $ 11,104 (in millions) September 30, December 31, Noncurrent receivables, net (included in other noncurrent assets, net) $ 1,261 $ 1,399 Contract acquisition and fulfillment costs (included in other noncurrent assets, net) $ 1,055 $ 991 Noncurrent deferred revenue (included in other noncurrent liabilities) $ 663 $ 650
NBCUniversal Media LLC [Member]
Revenue [Line Items]
Revenue	Revenue Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Distribution $ 1,681 $ 1,655 $ 5,123 $ 5,166 Advertising 809 812 2,592 2,718 Content licensing and other 281 383 871 997 Total Cable Networks 2,771 2,850 8,586 8,881 Advertising 1,191 1,355 3,837 5,107 Content licensing 447 538 1,479 1,541 Distribution and other 592 559 1,783 1,692 Total Broadcast Television 2,230 2,452 7,099 8,340 Theatrical 549 601 1,246 1,564 Content licensing 737 719 2,266 2,100 Home entertainment 185 260 681 733 Other 235 239 738 779 Total Filmed Entertainment 1,706 1,819 4,931 5,176 Total Theme Parks 1,631 1,528 4,371 4,170 Headquarters and Other 21 49 117 157 Eliminations (a) (65 ) (73 ) (238 ) (256 ) Total revenue $ 8,294 $ 8,625 $ 24,866 $ 26,468 (a) 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 primarily in Europe and Asia. The table below summarizes revenue by geographic location. Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 United States $ 6,382 $ 6,758 $ 19,674 $ 20,945 Foreign 1,912 1,867 5,192 5,523 Total revenue $ 8,294 $ 8,625 $ 24,866 $ 26,468 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 . (in millions) September 30, December 31, Receivables, gross $ 7,139 $ 7,392 Less: Allowance for doubtful accounts 99 99 Receivables, net $ 7,040 $ 7,293 (in millions) September 30, December 31, Noncurrent receivables, net (included in other noncurrent assets, net) $ 1,097 $ 1,180 Noncurrent deferred revenue (included in other noncurrent liabilities) $ 422 $ 481

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Computation of Diluted EPS Three Months Ended September 30 2019 2018 (in millions, except per share data) Net Income Shares Per Share Net Income Shares Per Share Basic EPS attributable to Comcast Corporation shareholders $ 3,217 4,551 $ 0.71 $ 2,886 4,564 $ 0.63 Effect of dilutive securities: Assumed exercise or issuance of shares relating to stock plans 68 55 Diluted EPS attributable to Comcast Corporation shareholders $ 3,217 4,619 $ 0.70 $ 2,886 4,619 $ 0.62 Nine Months Ended September 30 2019 2018 (in millions, except per share data) Net Income Shares Per Share Net Income Shares Per Share Basic EPS attributable to Comcast Corporation shareholders $ 9,895 4,544 $ 2.18 $ 9,220 4,599 $ 2.00 Effect of dilutive securities: Assumed exercise or issuance of shares relating to stock plans 62 56 Diluted EPS attributable to Comcast Corporation shareholders $ 9,895 4,606 $ 2.15 $ 9,220 4,655 $ 1.98 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, 2019 or 2018 .

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2019
Debt Instrument [Line Items]
Long-Term Debt	Long-Term Debt As of September 30, 2019 , our debt had a carrying value of $100.9 billion and an estimated fair value of $114.1 billion . The estimated fair value of our publicly traded debt was primarily based on Level 1 inputs that use quoted market values 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. Debt Borrowings and Repayments For the nine months ended September 30, 2019 , we had borrowings of $516 million primarily related to the Universal Beijing Resort term loans . For the nine months ended September 30, 2019 , we made repayments of $10.0 billion , including the early redemptions of $3.4 billion of senior notes due 2020 and the partial repayment of a term loan, both of which were funded using proceeds from our collateralized obligation (see Note 9). Guarantee Structure Comcast, Comcast Cable and NBCUniversal fully and unconditionally guarantee each other’s debt securities, including the Comcast revolving credit facility . As of September 30, 2019 , the principal amount of debt securities outstanding within the cross-guarantee structure totaled $86.4 billion . Comcast and Comcast Cable fully and unconditionally guarantee NBCUniversal Enterprise’s debt securities, including its revolving credit facility. As of September 30, 2019 , the principal amount of debt securities guaranteed by Comcast and Comcast Cable totaled $1.5 billion . NBCUniversal does not guarantee NBCUniversal Enterprise’s debt securities. Comcast fully and unconditionally guarantees Universal Studios Japan’s yen-denominated ¥379 billion (approximately $3.5 billion using exchange rates as of September 30, 2019 ) term loans with a final maturity of March 2022. None of Comcast, Comcast Cable nor NBCUniversal guarantee the ¥7.4 billion RMB (approximately $1.0 billion using exchange rates as of September 30, 2019 ) principal amount of Universal Beijing Resort term loans outstanding. In May 2019, Comcast provided a full and unconditional guarantee of Sky’s debt (approximately $9.0 billion using exchange rates as of September 30, 2019 ) in connection with Sky’s noteholders consenting to (i) the transfer of the listing of three series of notes from the Main Market of the London Stock Exchange to the Professional Securities Market of the London Stock Exchange and (ii) amending certain terms of the Sky notes.
NBCUniversal Media LLC [Member]
Debt Instrument [Line Items]
Long-Term Debt	Long-Term Debt As of September 30, 2019 , our debt, excluding our revolving credit agreement with Comcast, had a carrying value of $10.8 billion and an estimated fair value of $11.8 billion . The estimated fair value of our publicly traded debt was primarily based on Level 1 inputs that use quoted market values 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. Debt Borrowings and Repayments For the nine months ended September 30, 2019 , we had borrowings of $572 million primarily related to the Universal Beijing Resort term loans . For the nine months ended September 30, 2019 , we made repayments of $2.7 billion including the early redemptions of $2.0 billion of senior notes due 2020 and $610 million of notes due 2049 to Comcast. The early redemptions were funded using proceeds from our collateralized obligation (see Note 8) and were accounted for as debt extinguishments, resulting in a charge of $213 million to interest expense in the third quarter of 2019, of which $178 million related to the notes due to Comcast. Guarantee Structure We, Comcast and a 100% owned cable holding company subsidiary of Comcast (“CCCL Parent”) fully and unconditionally guarantee each other’s debt securities, including the $7.6 billion Comcast revolving credit facility due 2022. As of September 30, 2019 , $80.6 billion principal amount of outstanding debt securities of Comcast and CCCL Parent were subject to the cross-guarantee structure . We do not, however, guarantee the obligations of NBCUniversal Enterprise with respect to its $1.5 billion outstanding debt securities, including its senior notes, revolving credit facility, commercial paper program nor its $725 million liquidation preference of Series A cumulative preferred stock. The Universal Studios Japan term loans are not subject to the cross-guarantee structure, however they have a separate guarantee from Comcast. The Universal Beijing Resort term loans are not guaranteed.

Significant Transactions

Significant Transactions	9 Months Ended
	Sep. 30, 2019
Business Acquisition [Line Items]
Significant Transactions	Significant Transactions Sky Transaction On October 9, 2018, in connection with our offer to acquire the share capital of Sky, we acquired a controlling interest in Sky through a series of purchases of Sky shares at our offer price of £17.28 per share. In the fourth quarter of 2018, we acquired the remaining Sky shares and now own 100% of Sky’s equity interests. Total cash consideration was £30.2 billion (approximately $39.4 billion using the exchange rates on the purchase dates). We financed the acquisition through a combination of new fixed and floating rate notes, issuance of term loans and cash on hand. 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. Allocation of Purchase Price We have applied acquisition accounting to Sky. Sky’s results of operations are included in our consolidated results of operations since the acquisition date and are reported in our Sky segment. The net assets of Sky were recorded at their estimated fair value using primarily Level 3 inputs. In valuing acquired assets and liabilities, fair value estimates are based on, but are not limited to, future expected cash flows, market rate assumptions for contractual obligations and appropriate discount rates. During the first quarter of 2019, we revised our estimates of fair value, primarily related to intangible assets, property and equipment, and investments (included below in other noncurrent assets and (liabilities), net), and recorded corresponding adjustments to deferred taxes. We also recorded an additional valuation allowance of approximately $1.2 billion associated with our assessment of the realization of Sky’s deferred tax assets, primarily related to net operating losses. These changes resulted in an increase in goodwill of approximately $1.4 billion and an adjustment in the first quarter of 2019 related to the fourth quarter of 2018 that resulted in an increase to depreciation and amortization expense of $53 million . The table below presents the allocation of the all-cash purchase price of £30.2 billion , or $39.4 billion , to the assets and liabilities of Sky as a result of the transaction. Allocation of Purchase Price (in millions) Consideration transferred $ 39,387 Allocation of purchase price Cash $ 1,283 Accounts receivable and other current assets 2,359 Film and television costs 2,512 Property and equipment 4,127 Intangible assets 19,539 Accounts payable, accrued liabilities and other current liabilities (5,885 ) Long-term debt (11,468 ) Deferred tax assets (liabilities), net (2,974 ) Other noncurrent assets and (liabilities), net (1,398 ) Fair value of identifiable net assets acquired 8,095 Goodwill $ 31,292 Property and Equipment Property and equipment includes customer premise equipment with a carrying value of $1.4 billion , which have original estimated useful lives of 5 to 7 years . The remaining property and equipment includes network assets, real estate, and other machinery and equipment. Intangible Assets Finite-lived intangible assets primarily consist of customer relationships with a carrying amount of $9.5 billion and developed technology and software with a carrying amount of $4.3 billion , with original estimated useful lives between 6 and 19 years and 4 and 9 years , respectively. Indefinite-lived assets consist of trade names with a carrying amount of $5.8 billion . Goodwill Goodwill consists primarily of intangible assets that do not qualify for separate recognition, including increased footprint, assembled workforce, noncontractual relationships and agreements. The acquired goodwill is not expected to be deductible for tax purposes. Acquisition-Related Costs As a result of the Sky transaction, we incurred expenses in 2018 related to legal, accounting, valuation and other professional services, which are reflected in other operating and administrative expenses. We also incurred certain financing costs associated with our borrowings, which are reflected in interest expense. The table below presents the amounts related to these expenses included in our condensed consolidated statement of income. (in millions) Three Months Ended Nine Months Ended Other operating and administrative expenses $ 8 $ 29 Interest expense $ 34 $ 45 Unaudited Pro Forma Information The following unaudited pro forma information has been presented as if the Sky transaction occurred on January 1, 2017. This information is based on historical results of operations, adjusted for allocation of purchase price and other acquisition accounting adjustments, and is not necessarily indicative of what the results would have been had we operated the business since January 1, 2017. For pro forma purposes, 2018 earnings were adjusted to exclude the acquisition-related costs. No pro forma adjustments have been made for cost savings or synergies that have been or may be achieved by the combined businesses. (in millions, except per share data) Three Months Ended Nine Months Ended Revenue $ 26,824 $ 81,239 Net income attributable to Comcast Corporation $ 3,448 $ 9,388 Basic earnings per common share attributable to Comcast Corporation shareholders $ 0.75 $ 2.04 Diluted earnings per common share attributable to Comcast Corporation shareholders $ 0.74 $ 2.01 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. The debt financing, which is being provided by a syndicate of Chinese financial institutions, contains certain financial and operating covenants and a maximum borrowing limit of ¥ 26.6 billion RMB (approximately $4 billion ). The debt financing is secured by the assets of Universal Beijing Resort and the equity interests of the investors. As of September 30, 2019 , Universal Beijing Resort had $1 billion principal amount of term loans outstanding under the debt financing agreements. We have concluded that Universal Beijing Resort is a variable interest entity based on its governance structure, and we consolidate it because we have the power to direct activities that most significantly impact its economic performance. There are no liquidity arrangements, guarantees or other financial commitments between us and Universal Beijing Resort, and therefore our maximum risk of financial loss is our 30% interest. Universal Beijing Resort’s results of operations are reported in our Theme Parks segment. Our condensed consolidated statement of cash flows includes the costs of construction and related borrowings in the “construction of Universal Beijing Resort” and “proceeds from borrowings” captions, respectively, and equity contributions from our investing partner are included in other financing activities. In March 2018, Universal Beijing Resort received initial equity investments through a combination of cash and noncash contributions from the investors. As of September 30, 2019 , our condensed consolidated balance sheet included assets, primarily property and equipment, and liabilities, including the term loans, of Universal Beijing Resort totaling $2.4 billion and $1.7 billion , respectively.
NBCUniversal Media LLC [Member]
Business Acquisition [Line Items]
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. The debt financing, which is being provided by a syndicate of Chinese financial institutions, contains certain financial and operating covenants and a maximum borrowing limit of ¥ 26.6 billion RMB (approximately $4 billion ). The debt financing is secured by the assets of Universal Beijing Resort and the equity interests of the investors. As of September 30, 2019 , Universal Beijing Resort had $1 billion principal amount of term loans outstanding under the debt financing agreements. We have concluded that Universal Beijing Resort is a variable interest entity based on its governance structure, and we consolidate it because we have the power to direct activities that most significantly impact its economic performance. There are no liquidity arrangements, guarantees or other financial commitments between us and Universal Beijing Resort, and therefore our maximum risk of financial loss is our 30% interest. Universal Beijing Resort’s results of operations are reported in our Theme Parks segment. Our condensed consolidated statement of cash flows includes the costs of construction and related borrowings in the “construction of Universal Beijing Resort” and “proceeds from borrowings” captions, respectively, and equity contributions from our investing partner are included in other financing activities. In March 2018, Universal Beijing Resort received initial equity investments through a combination of cash and noncash contributions from the investors. As of September 30, 2019 , our condensed consolidated balance sheet included assets, primarily property and equipment, and liabilities, including the term loans, of Universal Beijing Resort totaling $2.4 billion and $1.7 billion

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to leases. The most significant change in the updated accounting guidance requires lessees to recognize lease assets and liabilities on the balance sheet for all operating leases with the exception of short-term leases. The standard also expands the disclosures regarding the amount, timing and uncertainty of cash flows arising from leases. For a lessee, the recognition, measurement and presentation of expenses and cash flows arising from a lease did not significantly change from previous guidance. We adopted the updated guidance on January 1, 2019 on a prospective basis and as a result, prior period amounts were not adjusted to reflect the impacts of the updated guidance. In addition, as permitted under the transition guidance within the new standard, prior scoping and classification conclusions were carried forward for leases existing as of the adoption date. Upon adoption, we recorded $4.2 billion and $4.8 billion for operating lease assets and liabilities, respectively, which includes the impact of fair value adjustments, prepaid and deferred rent and lease incentives. The adoption of the updated accounting guidance did not significantly impact our recognition of finance leases, which were previously described as capital leases. As of the date of adoption, our liabilities for finance leases were $787 million , including $229 million of additional contracts determined to be leases in connection with the Sky transaction , which were recorded in long-term debt, and the related assets were recorded in property and equipment, net. Our finance leases were not considered material for further disclosure. The adoption of the new accounting guidance did not have a material impact on our consolidated results of operations or cash flows. See Note 12 for further information. Film and Television Costs In March 2019, the FASB updated the accounting guidance related to film and television costs. The updated guidance aligns 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 updated guidance also updates certain presentation and disclosure requirements for capitalized film and television costs, and requires impairment testing to be performed at a group level for capitalized film and television costs when the content is predominantly monetized with other owned or licensed content. The updated guidance is effective for us as of January 1, 2020 and early adoption is permitted. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements.
NBCUniversal Media LLC [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to leases. The most significant change in the updated accounting guidance requires lessees to recognize lease assets and liabilities on the balance sheet for all operating leases with the exception of short-term leases. The standard also expands the disclosures regarding the amount, timing and uncertainty of cash flows arising from leases. For a lessee, the recognition, measurement and presentation of expenses and cash flows arising from a lease did not significantly change from previous guidance. We adopted the updated guidance on January 1, 2019 on a prospective basis and as a result, prior period amounts were not adjusted to reflect the impacts of the updated guidance. In addition, as permitted under the transition guidance within the new standard, prior scoping and classification conclusions were carried forward for leases existing as of the adoption date. Upon adoption, we recorded approximately $1.7 billion and $1.8 billion of operating lease assets and liabilities, respectively, which includes the impact of fair value adjustments, prepaid rent and lease incentives. The adoption of the updated accounting guidance did not impact our recognition of finance leases, which were previously described as capital leases. As of the date of adoption, our liabilities for finance leases were $332 million , which were recorded in long-term debt, and the related assets were recorded in property and equipment, net. Our finance leases were not considered material for further disclosure. The adoption of the new accounting guidance did not have a material impact on our consolidated results of operations or cash flows. See Note 9 for further information. Film and Television Costs In March 2019, the FASB updated the accounting guidance related to film and television costs. The updated guidance aligns 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 updated guidance also updates certain presentation and disclosure requirements for capitalized film and television costs, and requires impairment testing to be performed at a group level for capitalized film and television costs when the content is predominantly monetized with other owned or licensed content. The updated guidance is effective for us as of January 1, 2020 and early adoption is permitted. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements.

Film and Television Costs

Film and Television Costs	9 Months Ended
	Sep. 30, 2019
Film And Television Costs [Line Items]
Film And Television Costs	Film and Television Costs (in millions) September 30, December 31, Film Costs: Released, less amortization $ 1,615 $ 1,600 Completed, not released 124 144 In production and in development 1,282 1,063 3,021 2,807 Television Costs: Released, less amortization 2,514 2,289 In production and in development 1,228 953 3,742 3,242 Programming rights, less amortization 5,341 5,534 12,104 11,583 Less: Current portion of programming rights 3,457 3,746 Film and television costs $ 8,647 $ 7,837
NBCUniversal Media LLC [Member]
Film And Television Costs [Line Items]
Film And Television Costs	Film and Television Costs (in millions) September 30, December 31, Film Costs: Released, less amortization $ 1,615 $ 1,600 Completed, not released 124 144 In production and in development 1,282 1,063 3,021 2,807 Television Costs: Released, less amortization 2,410 2,161 In production and in development 1,228 953 3,638 3,114 Programming rights, less amortization 2,578 2,694 9,237 8,615 Less: Current portion of programming rights 1,461 1,323 Film and television costs $ 7,776 $ 7,292

Investments

Investments	9 Months Ended
	Sep. 30, 2019
Investments [Line Items]
Investments	Investments Investment and Other Income (Loss), Net Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Equity in net income (losses) of investees, net $ (355 ) $ (76 ) $ (295 ) $ (56 ) Realized and unrealized gains (losses) on equity securities, net 174 (38 ) 582 (50 ) Other income (loss), net 71 3 224 198 Investment and other income (loss), net $ (110 ) $ (111 ) $ 511 $ 92 (in millions) September 30, December 31, Equity method $ 5,363 $ 4,035 Marketable equity securities 862 341 Nonmarketable equity securities 1,933 1,805 Other investments 1,841 1,796 Total investments 9,999 7,977 Less: Current investments 1,710 94 Less: Investment securing collateralized obligation 816 — Noncurrent investments $ 7,473 $ 7,883 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, 2019 , we recognized losses of $262 million and income of $6 million , respectively. For the three and nine months ended September 30, 2018 , we recognized income of $38 million and $224 million , respectively. For the nine months ended September 30, 2019 and 2018 , we made cash capital contributions totaling $475 million and $133 million , respectively, to Atairos. As of September 30, 2019 and December 31, 2018 , our investment was $3.2 billion and $2.7 billion , respectively. In April 2018, we sold a controlling interest in our arena management-related businesses to Atairos and received as consideration additional equity interests in Atairos. In connection with the sale of the businesses, we recognized a pre-tax gain of $200 million in other operating gains. Hulu and Collateralized Obligation In May 2019, we entered into a series of agreements (the “Hulu Transaction”) with The Walt Disney Company and certain of its subsidiaries (“Disney”), whereby we relinquished our board seats and substantially all voting rights associated with our investment in Hulu, LLC (“Hulu”), and Disney assumed full operational control. We also acquired our proportionate share of the approximate 10% interest in Hulu previously held by AT&T Inc. (“AT&T”) for approximately $477 million , increasing our ownership interest to approximately 33% from approximately 30% . Following the Hulu Transaction, future capital calls are limited to $1.5 billion in the aggregate each year, with any excess funding requirements funded with member loans. We have the right, but not the obligation, to fund our proportionate share of these capital calls, and if we elect not to fund our share of future equity capital calls, our ownership interest will be diluted, subject to an ownership floor of 21% . The Hulu Transaction agreements include put and call provisions regarding our ownership interest in Hulu, pursuant to which, as early as January 2024, we can require Disney to buy, and Disney can require us to sell our interest, in either case, for fair value at that future time subject to a minimum equity value of $27.5 billion for 100% of the equity of Hulu. The minimum total equity value and ownership floor guarantee minimum proceeds of approximately $5.8 billion upon exercise of the put or call. In connection with the Hulu Transaction, we agreed to extend certain licenses of NBCUniversal content until late 2024. We can terminate most of our content license agreements with Hulu beginning in 2022, and beginning in 2020, we have the right to modify certain content licenses that are currently exclusive to Hulu, so that we can exhibit the content on our platforms in return for reducing the license fee. In August 2019, we entered into a financing arrangement with a syndicate of banks whereby we received proceeds of $5.2 billion under a term loan facility due March 2024. The principal amount of the term loan is secured by the proceeds guaranteed by Disney under the put/call provisions related to our investment in Hulu. The proceeds from the put/call provisions are available only for the repayment of the term loan and are not available to us unless and until the bank lenders are fully paid under the term loan provisions. The bank lenders have no rights to proceeds from the put/call provisions in excess of amounts owed under the term loan. As a result of this transaction, we now 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. As of September 30, 2019 , our collateralized obligation had a carrying value of $5.2 billion and an estimated fair value of $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 account for our investment using the equity method. 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. For the three and nine months ended September 30, 2018 , we recognized losses of $132 million and $370 million , respectively. For the nine months ended September 30, 2019 and 2018 , we made cash capital contributions totaling $903 million , inclusive of the funding for the acquisition of the AT&T interest, and $341 million , respectively, to Hulu. As of September 30, 2019 and December 31, 2018 , our investment was $816 million and $248 million , respectively. In August 2016, Time Warner Inc., which was acquired by AT&T in 2018, acquired a 10% interest in Hulu, diluting our interest at that time from approximately 33% to approximately 30% . Given the contingent nature of put and call options related to that interest, we recorded a deferred gain as a result of the dilution. In the first quarter of 2019, the put and call options expired unexercised and we recognized the previously deferred gain of $159 million in other income (loss), net. The Weather Channel In March 2018, we sold our investment in The Weather Channel cable network and recognized a pretax gain of $64 million in other income (loss), net. Marketable Equity Securities 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. For the three and nine months ended September 30, 2018 , we recognized unrealized losses of $135 million and $180 million , respectively. As of September 30, 2019 and December 31, 2018 , our investment was $465 million and $162 million , respectively. Peloton In September 2019, as a result of Peloton’s initial public offering, we recognized unrealized gains of $150 million related to our investment in realized and unrealized gains (losses) on equity securities, net. Following the initial public offering, we now present our investment in marketable equity securities, which was previously presented in non-marketable equity securities. As of September 30, 2019 and December 31, 2018 , our investment was $260 million and $110 million , respectively. Other Investments AirTouch We hold two series of preferred stock of Verizon Americas, Inc., formerly known as AirTouch Communications, Inc. (“AirTouch”), a subsidiary of Verizon Communications Inc., which are redeemable in April 2020. As of both September 30, 2019 and December 31, 2018 , our investment in AirTouch was $1.6 billion . We account for our investment in AirTouch as a held to maturity investment using the cost method. As of September 30, 2019 , the estimated fair value of the AirTouch preferred stock and the estimated fair value of the associated liability related to the redeemable subsidiary preferred shares issued by one of our consolidated subsidiaries were each $1.7 billion . The estimated fair values were 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.
NBCUniversal Media LLC [Member]
Investments [Line Items]
Investments	Investments Investment and Other Income (Loss), Net Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Equity in net income (losses) of investees, net $ (88 ) $ (119 ) $ (299 ) $ (306 ) Realized and unrealized gains (losses) on equity securities, net 178 (91 ) 436 (128 ) Other income (loss), net 79 5 312 57 Investment and other income (loss), net $ 169 $ (205 ) $ 449 $ (377 ) (in millions) September 30, December 31, Equity method $ 1,290 $ 707 Marketable equity securities 725 162 Nonmarketable equity securities 794 811 Total investments 2,809 1,680 Less: Investment securing collateralized obligation 816 — Noncurrent investments $ 1,993 $ 1,680 Equity Method Hulu and Collateralized Obligation In May 2019, we entered into a series of agreements (the “Hulu Transaction”) with The Walt Disney Company and certain of its subsidiaries (“Disney”), whereby we relinquished our board seats and substantially all voting rights associated with our investment in Hulu, LLC (“Hulu”), and Disney assumed full operational control. We also acquired our proportionate share of the approximate 10% interest in Hulu previously held by AT&T Inc. (“AT&T”) for approximately $477 million , increasing our ownership interest to approximately 33% from approximately 30% . Following the Hulu Transaction, future capital calls are limited to $1.5 billion in the aggregate each year, with any excess funding requirements funded with member loans. We have the right, but not the obligation, to fund our proportionate share of these capital calls, and if we elect not to fund our share of future equity capital calls, our ownership interest will be diluted, subject to an ownership floor of 21% . The Hulu Transaction agreements include put and call provisions regarding our ownership interest in Hulu, pursuant to which, as early as January 2024, we can require Disney to buy, and Disney can require us to sell our interest, in either case, for fair value at that future time subject to a minimum equity value of $27.5 billion for 100% of the equity of Hulu. The minimum total equity value and ownership floor guarantee minimum proceeds of approximately $5.8 billion upon exercise of the put or call. In connection with the Hulu Transaction, we agreed to extend certain licenses of NBCUniversal content until late 2024. We can terminate most of our content license agreements with Hulu beginning in 2022, and beginning in 2020, we have the right to modify certain content licenses that are currently exclusive to Hulu, so that we can exhibit the content on our platforms in return for reducing the license fee. In August 2019, we entered into a financing arrangement with a syndicate of banks whereby we received proceeds of $5.2 billion under a term loan facility due March 2024. The principal amount of the term loan is secured by the proceeds guaranteed by Disney under the put/call provisions related to our investment in Hulu. The proceeds from the put/call provisions are available only for the repayment of the term loan and are not available to us unless and until the bank lenders are fully paid under the term loan provisions. The bank lenders have no rights to proceeds from the put/call provisions in excess of amounts owed under the term loan. As a result of this transaction, we now 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. As of September 30, 2019 , our collateralized obligation had a carrying value of $5.2 billion and an estimated fair value of $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 account for our investment using the equity method. 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. For the three and nine months ended September 30, 2018 , we recognized losses of $132 million and $370 million , respectively. For the nine months ended September 30, 2019 and 2018 , we made cash capital contributions totaling $903 million , inclusive of the funding for the acquisition of the AT&T interest, and $341 million , respectively, to Hulu. As of September 30, 2019 and December 31, 2018 , our investment was $816 million and $248 million , respectively. In August 2016, Time Warner Inc., which was acquired by AT&T in 2018, acquired a 10% interest in Hulu, diluting our interest at that time from approximately 33% to approximately 30% . Given the contingent nature of put and call options related to that interest, we recorded a deferred gain as a result of the dilution. In the first quarter of 2019, the put and call options expired unexercised and we recognized the previously deferred gain of $159 million in other income (loss), net. The Weather Channel In March 2018, we sold our investment in The Weather Channel cable network and recognized a pretax gain of $64 million in other income (loss), net. Marketable Equity Securities 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. For the three and nine months ended September 30, 2018 , we recognized unrealized losses of $135 million and $180 million , respectively. As of September 30, 2019 and December 31, 2018 , our investment was $465 million and $162 million , respectively. Peloton In September 2019, as a result of Peloton’s initial public offering, we recognized unrealized gains of $150 million related to our investment in realized and unrealized gains (losses) on equity securities, net. Following the initial public offering, we now present our investment in marketable equity securities, which was previously presented in non-marketable equity securities. As of September 30, 2019 and December 31, 2018 , our investment was $260 million and $110 million , respectively.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill NBCUniversal (in millions) Cable Cable Broadcast Filmed Theme Sky Corporate Total Balance, December 31, 2018 $ 12,784 $ 13,407 $ 843 $ 3,184 $ 6,684 $ 29,250 $ 2 $ 66,154 Acquisitions 131 — 13 — — 10 — 154 Dispositions — — — — — (12 ) — (12 ) Adjustments (a) 2,166 490 199 138 — (1,555 ) 2 1,440 Foreign currency translation (116 ) (34 ) (11 ) (11 ) 106 (757 ) — (823 ) Balance, September 30, 2019 $ 14,965 $ 13,863 $ 1,044 $ 3,311 $ 6,790 $ 26,936 $ 4 $ 66,913 (a) Adjustments during the nine months ended September 30, 2019 primarily included 1) measurement period adjustments resulting from finalization of acquisition accounting for Sky and 2) the final assignment of goodwill resulting from the Sky transaction to our reporting units. We performed our annual impairment testing of goodwill and cable franchise rights and other indefinite-lived intangible assets as of July 1, 2019 and no impairment charge was required.

Supplemental Financial Informat

Supplemental Financial Information	9 Months Ended
	Sep. 30, 2019
Supplemental Financial Information [Line Items]
Supplemental Financial Information	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 2019 , we granted 12.4 million RSUs and 41.9 million stock options related to our annual management awards. The weighted-average fair values associated with these grants were $39.88 per RSU and $7.91 per stock option. Recognized Share-Based Compensation Expense Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Restricted share units $ 143 $ 94 $ 437 $ 279 Stock options 57 50 176 155 Employee stock purchase plans 8 7 23 24 Total $ 208 $ 151 $ 636 $ 458 As of September 30, 2019 , we had unrecognized pretax compensation expense of $1.2 billion and $529 million related to nonvested RSUs and nonvested stock options, respectively. Cash Payments for Interest and Income Taxes Nine Months Ended (in millions) 2019 2018 Interest $ 3,167 $ 2,240 Income taxes $ 2,490 $ 1,533 Noncash Activities During the nine months ended September 30, 2019 : • we acquired $2.0 billion of property and equipment and intangible assets that were accrued but unpaid • we recorded a liability of $955 million for a quarterly cash dividend of $0.21 per common share to be paid in October 2019 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, December 31, Cash and cash equivalents $ 3,507 $ 3,814 Restricted cash included in other current assets 47 46 Restricted cash included in other noncurrent assets, net 48 49 Cash, cash equivalents and restricted cash, end of period $ 3,602 $ 3,909 Accumulated Other Comprehensive Income (Loss) (in millions) September 30, September 30, Unrealized gains (losses) on marketable securities $ 7 $ 2 Deferred gains (losses) on cash flow hedges 162 28 Unrecognized gains (losses) on employee benefit obligations 301 294 Cumulative translation adjustments (1,629 ) 50 Accumulated other comprehensive income (loss), net of deferred taxes $ (1,159 ) $ 374
NBCUniversal Media LLC [Member]
Supplemental Financial Information [Line Items]
Supplemental Financial Information	Supplemental Financial Information Leases Our leases consist primarily of real estate and equipment. We determine if an arrangement is a lease at inception. Lease assets and liabilities are recognized upon commencement of the lease based on the present value of the future minimum lease payments over the lease term. The lease term includes options to extend the lease when it is reasonably certain that we will exercise that option. We generally utilize our incremental borrowing rate based on information available at the commencement of the lease in determining the present value of future payments. The lease asset also includes any lease payments made and initial direct costs incurred and excludes lease incentives. Lease assets and liabilities are not recorded for leases with an initial term of one year or less. Lease expense for operating leases recorded in the balance sheet is included in operating costs and expenses and is based on the future minimum lease payments recognized on a straight-line basis over the term of the lease plus any variable lease costs. Operating lease expenses, inclusive of short-term and variable lease expenses, recognized in our condensed consolidated statement of income for the three and nine months ended September 30, 2019 were $110 million and $331 million , respectively. These amounts do not include lease costs associated with production activities or other amounts capitalized in our condensed consolidated balance sheet, which are not material. The table below summarizes the operating lease assets and liabilities recorded in our condensed consolidated balance sheet. Condensed Consolidated Balance Sheet (in millions) September 30, Other noncurrent assets, net $ 1,589 Accrued expenses and other current liabilities $ 183 Other noncurrent liabilities $ 1,514 The table below summarizes our future minimum rental commitments for operating leases as of September 30, 2019 applying the new accounting guidance. (in millions) September 30, Remaining three months of 2019 $ 56 2020 258 2021 223 2022 185 2023 159 Thereafter 1,473 Total future minimum lease payments 2,354 Less: imputed interest 657 Total liability $ 1,697 The weighted average remaining lease term for operating leases and the weighted average discount rate used to calculate our operating lease liabilities as of September 30, 2019 were 15 years and 4.10% , respectively. For the nine months ended September 30, 2019 , cash payments for operating leases recorded in the condensed consolidated balance sheet were $199 million . Leases that have not yet commenced and lease assets and liabilities associated with leases entered into during the period were not material. The tables below summarize our future minimum rental commitments for operating leases as of December 31, 2018 and rent expense for operating leases for the three and nine months ended September 30, 2018 using the accounting guidance in effect at that time. (in millions) December 31, 2019 $ 248 2020 $ 232 2021 $ 199 2022 $ 168 2023 $ 144 Thereafter $ 1,380 (in millions) Three Months Ended Nine Months Ended Rental expense $ 69 $ 212 Cash Payments for Interest and Income Taxes Nine Months Ended (in millions) 2019 2018 Interest $ 314 $ 253 Income taxes $ 292 $ 373 Noncash Activities During the nine months ended September 30, 2019 , we acquired $755 million of property and equipment and intangible assets that were accrued but unpaid. 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, December 31, Cash and cash equivalents $ 1,157 $ 1,444 Restricted cash included in other noncurrent assets, net 20 20 Cash, cash equivalents and restricted cash, end of period $ 1,177 $ 1,464 Accumulated Other Comprehensive Income (Loss) (in millions) September 30, September 30, Deferred gains (losses) on cash flow hedges $ 9 $ 5 Unrecognized gains (losses) on employee benefit obligations 131 115 Cumulative translation adjustments 143 (22 ) Accumulated other comprehensive income (loss) $ 283 $ 98

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2019
NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Related Party Transactions	Related Party Transactions In the ordinary course of our business, we enter into transactions with Comcast. We generate revenue from Comcast primarily from the distribution of our cable network programming, the fees received under retransmission consent agreements in our Broadcast Television segment and, to a lesser extent, the sale of advertising and our owned programming, and we incur expenses primarily related to advertising and various support services provided by Comcast to us. As part of the Comcast cash management process, we and Comcast have a revolving credit agreement with a maturity date of 2026 that allows us to borrow from Comcast and for Comcast to borrow from us up to $5 billion . Depending on the receivable or payable position, amounts owed by us to Comcast or to us by Comcast under the revolving credit agreements are presented under the captions “notes payable to Comcast” and “notes receivable from Comcast,” respectively, in our condensed consolidated balance sheet and are presented as current since the amounts include daily borrowings and repayments throughout the year based on our working capital needs. In the third quarter of 2019, using a portion of the proceeds from a collateralized obligation, we issued $1.3 billion of non-interest bearing notes due 2024 to Comcast, repaid $1.0 billion under our revolving credit agreement with Comcast, and repaid the $610 million 4.00% notes due 2049 to Comcast. Comcast is also the counterparty to one of our contractual obligations. As of September 30, 2019 , the carrying value of the liability associated with this contractual obligation was $383 million . The following tables present transactions with Comcast and its consolidated subsidiaries that are included in our condensed consolidated financial statements. Condensed Consolidated Statement of Income Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Transactions with Comcast and Consolidated Subsidiaries Revenue $ 597 $ 506 $ 1,808 $ 1,580 Total costs and expenses $ (73 ) $ (59 ) $ (198 ) $ (162 ) Interest expense and investment and other income (loss), net $ (162 ) $ (9 ) $ (148 ) $ (52 ) Condensed Consolidated Balance Sheet (in millions) September 30, December 31, Transactions with Comcast and Consolidated Subsidiaries Receivables, net $ 533 $ 464 Notes receivable from Comcast, current $ 4,192 $ 2,054 Film and television costs $ 21 $ 27 Note receivable from Comcast, noncurrent $ 1,101 $ — Other noncurrent assets, net $ 71 $ — Accounts payable and accrued expenses related to trade creditors $ 75 $ 78 Accrued expenses and other current liabilities $ 84 $ 32 Notes payable to Comcast $ 91 $ 54 Long-term debt (See Note 4) $ 158 $ 701 Other noncurrent liabilities $ 459 $ 410 Share-Based Compensation Comcast maintains share-based compensation plans that consist primarily of awards of restricted share units and stock options to certain employees and directors as part of its approach to long-term incentive compensation. Additionally, through its employee stock purchase plans, employees are able to purchase shares of Comcast common stock at a discount through payroll deductions. Certain of our employees participate in these plans and the expense associated with their participation is settled in cash with Comcast. For the three months ended September 30, 2019 and 2018 , we recognized share-based compensation expense of $45 million and $37 million , respectively. For the nine months ended September 30, 2019 and 2018 , we recognized share-based compensation expense of $141 million and $115 million

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases Our leases consist primarily of real estate, vehicles and other equipment. We determine if an arrangement is a lease at inception. Lease assets and liabilities are recognized upon commencement of the lease based on the present value of the future minimum lease payments over the lease term. The lease term includes options to extend the lease when it is reasonably certain that we will exercise that option. We generally utilize our incremental borrowing rate based on information available at the commencement of the lease in determining the present value of future payments. The lease asset also includes any lease payments made and initial direct costs incurred and excludes lease incentives. Lease assets and liabilities are not recorded for leases with an initial term of one year or less. Lease expense for operating leases recorded in the balance sheet is included in operating costs and expenses and is based on the future minimum lease payments recognized on a straight-line basis over the term of the lease plus any variable lease costs. Operating lease expenses, inclusive of short-term and variable lease expenses, recognized in our condensed consolidated statement of income for the three and nine months ended September 30, 2019 were $268 million and $806 million , respectively. These amounts do not include lease costs associated with production activities or other amounts capitalized in our condensed consolidated balance sheet, which are not material. The table below summarizes the operating lease assets and liabilities recorded in our condensed consolidated balance sheet. Condensed Consolidated Balance Sheet (in millions) September 30, Other noncurrent assets, net $ 4,011 Accrued expenses and other current liabilities $ 696 Other noncurrent liabilities $ 3,863 The table below summarizes our future minimum rental commitments for operating leases as of September 30, 2019 applying the new accounting guidance. (in millions) September 30, Remaining three months of 2019 $ 182 2020 880 2021 763 2022 633 2023 530 Thereafter 2,606 Total future minimum lease payments 5,594 Less: imputed interest 1,035 Total liability $ 4,559 The weighted average remaining lease term for operating leases and the weighted average discount rate used to calculate our operating lease liabilities as of September 30, 2019 were 10 years and 3.78% , respectively. For the nine months ended September 30, 2019 , cash payments for operating leases recorded in the condensed consolidated balance sheet were $700 million . Leases that have not yet commenced and lease assets and liabilities associated with leases entered into during the period were not material. The tables below summarize our future minimum rental commitments for operating leases as of December 31, 2018 and rent expense for operating leases for the three and nine months ended September 30, 2018 using the accounting guidance in effect at that time. These amounts have been updated to include $804 million of future cash payments related to additional contracts determined to be operating leases in connection with the Sky transaction. (in millions) December 31, 2019 $ 891 2020 $ 824 2021 $ 722 2022 $ 592 2023 $ 513 Thereafter $ 2,608 (in millions) Three Months Ended Nine Months Ended Rental expense $ 178 $ 548 Redeemable Subsidiary Preferred Stock As of September 30, 2019 , the fair value of the NBCUniversal Enterprise redeemable subsidiary preferred stock was $743 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 a defendant in several lawsuits claiming infringement of various patents relating to various aspects of our businesses. In certain of these cases, other industry participants are also defendants, and also in certain of these cases, we expect that any potential liability would be in part or in whole the responsibility of our equipment and technology vendors under applicable contractual indemnification provisions. In addition, we are subject to other legal proceedings and claims that arise in the ordinary course of our business. While the amount of ultimate liability with respect to such actions is not expected to materially affect our results of operations, cash flows or financial position, any litigation resulting from any such legal proceedings or claims could be time-consuming and injure our reputation.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	9 Months Ended
	Sep. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information Comcast (“Comcast Parent”), Comcast Cable Communications, LLC (“CCCL Parent”) and NBCUniversal (“NBCUniversal Media Parent”) have fully and unconditionally guaranteed each other’s debt. See Note 5 for additional information on the cross-guarantee structure. Condensed Consolidating Statement of Income For the Three Months Ended September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 26,827 $ — $ 26,827 Management fee revenue 326 — 319 — — (645 ) — Total revenue 326 — 319 — 26,827 (645 ) 26,827 Costs and Expenses: Programming and production — — — — 8,316 — 8,316 Other operating and administrative 209 — 319 230 7,977 (645 ) 8,090 Advertising, marketing and promotion — — — — 1,901 — 1,901 Depreciation 14 — — — 2,110 — 2,124 Amortization 1 — — — 1,055 — 1,056 Total costs and expenses 224 — 319 230 21,359 (645 ) 21,487 Operating income (loss) 102 — — (230 ) 5,468 — 5,340 Interest expense (873 ) (3 ) (47 ) (140 ) (104 ) — (1,167 ) Investment and other income (loss), net 3,776 3,729 3,620 1,632 1,390 (14,257 ) (110 ) Income (loss) before income taxes 3,005 3,726 3,573 1,262 6,754 (14,257 ) 4,063 Income tax (expense) benefit 212 (2 ) 10 (6 ) (989 ) — (775 ) Net income (loss) 3,217 3,724 3,583 1,256 5,765 (14,257 ) 3,288 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 71 — 71 Net income (loss) attributable to Comcast Corporation $ 3,217 $ 3,724 $ 3,583 $ 1,256 $ 5,694 $ (14,257 ) $ 3,217 Comprehensive income (loss) attributable to Comcast Corporation $ 2,120 $ 3,722 $ 3,584 $ 1,244 $ 4,397 $ (12,947 ) $ 2,120 Condensed Consolidating Statement of Income For the Three Months Ended September 30, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 22,135 $ — $ 22,135 Management fee revenue 299 — 294 — — (593 ) — Total revenue 299 — 294 — 22,135 (593 ) 22,135 Costs and Expenses: Programming and production — — — — 6,711 — 6,711 Other operating and administrative 208 — 294 230 6,305 (593 ) 6,444 Advertising, marketing and promotion — — — — 1,667 — 1,667 Depreciation 12 — — — 2,026 — 2,038 Amortization 1 — — — 579 — 580 Other operating gains — — — — (141 ) — (141 ) Total costs and expenses 221 — 294 230 17,147 (593 ) 17,299 Operating income (loss) 78 — — (230 ) 4,988 — 4,836 Interest expense (600 ) (3 ) (48 ) (113 ) (66 ) — (830 ) Investment and other income (loss), net 3,299 3,380 3,007 1,576 1,065 (12,438 ) (111 ) Income (loss) before income taxes 2,777 3,377 2,959 1,233 5,987 (12,438 ) 3,895 Income tax (expense) benefit 109 (1 ) 10 (2 ) (1,115 ) — (999 ) Net income (loss) 2,886 3,376 2,969 1,231 4,872 (12,438 ) 2,896 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 10 — 10 Net income (loss) attributable to Comcast Corporation $ 2,886 $ 3,376 $ 2,969 $ 1,231 $ 4,862 $ (12,438 ) $ 2,886 Comprehensive income (loss) attributable to Comcast Corporation $ 2,799 $ 3,349 $ 2,974 $ 1,112 $ 4,663 $ (12,098 ) $ 2,799 Condensed Consolidating Statement of Income For the Nine Months Ended September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 80,544 $ — $ 80,544 Management fee revenue 940 — 921 — — (1,861 ) — Total revenue 940 — 921 — 80,544 (1,861 ) 80,544 Costs and Expenses: Programming and production — — — — 25,140 — 25,140 Other operating and administrative 575 — 921 726 23,715 (1,861 ) 24,076 Advertising, marketing and promotion — — — — 5,674 — 5,674 Depreciation 44 — — — 6,517 — 6,561 Amortization 4 — — — 3,211 — 3,215 Total costs and expenses 623 — 921 726 64,257 (1,861 ) 64,666 Operating income (loss) 317 — — (726 ) 16,287 — 15,878 Interest expense (2,646 ) (9 ) (143 ) (377 ) (279 ) — (3,454 ) Investment and other income (loss), net 11,683 11,602 10,310 5,731 5,287 (44,102 ) 511 Income (loss) before income taxes 9,354 11,593 10,167 4,628 21,295 (44,102 ) 12,935 Income tax (expense) benefit 541 (9 ) 30 (17 ) (3,357 ) — (2,812 ) Net income (loss) 9,895 11,584 10,197 4,611 17,938 (44,102 ) 10,123 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 228 — 228 Net income (loss) attributable to Comcast Corporation $ 9,895 $ 11,584 $ 10,197 $ 4,611 $ 17,710 $ (44,102 ) $ 9,895 Comprehensive income (loss) attributable to Comcast Corporation $ 9,104 $ 11,600 $ 10,201 $ 4,640 $ 16,857 $ (43,298 ) $ 9,104 Condensed Consolidating Statement of Income For the Nine Months Ended September 30, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 66,661 $ — $ 66,661 Management fee revenue 889 — 873 — — (1,762 ) — Total revenue 889 — 873 — 66,661 (1,762 ) 66,661 Costs and Expenses: Programming and production — — — — 20,440 — 20,440 Other operating and administrative 626 — 873 772 18,814 (1,762 ) 19,323 Advertising, marketing and promotion — — — — 4,924 — 4,924 Depreciation 34 — — — 6,036 — 6,070 Amortization 4 — — — 1,746 — 1,750 Other operating gains — — — — (341 ) — (341 ) Total costs and expenses 664 — 873 772 51,619 (1,762 ) 52,166 Operating income (loss) 225 — — (772 ) 15,042 — 14,495 Interest expense (1,739 ) (9 ) (143 ) (332 ) (190 ) — (2,413 ) Investment and other income (loss), net 10,416 10,279 8,832 5,107 3,977 (38,519 ) 92 Income (loss) before income taxes 8,902 10,270 8,689 4,003 18,829 (38,519 ) 12,174 Income tax (expense) benefit 318 — 29 (12 ) (3,229 ) — (2,894 ) Net income (loss) 9,220 10,270 8,718 3,991 15,600 (38,519 ) 9,280 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 60 — 60 Net income (loss) attributable to Comcast Corporation $ 9,220 $ 10,270 $ 8,718 $ 3,991 $ 15,540 $ (38,519 ) $ 9,220 Comprehensive income (loss) attributable to Comcast Corporation $ 9,139 $ 10,245 $ 8,723 $ 3,877 $ 15,357 $ (38,202 ) $ 9,139 Condensed Consolidating Statement of Cash Flows For the Nine Months Ended September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Net cash provided by (used in) operating activities $ (1,522 ) $ 293 $ (217 ) $ (910 ) $ 21,818 $ — $ 19,462 Investing Activities: Net transactions with affiliates 10,333 (293 ) 217 2,883 (13,140 ) — — Capital expenditures (20 ) — — — (6,846 ) — (6,866 ) Cash paid for intangible assets (2 ) — — — (1,684 ) — (1,686 ) Acquisitions and construction of real estate properties (35 ) — — — (5 ) — (40 ) Construction of Universal Beijing Resort — — — — (736 ) — (736 ) Acquisitions, net of cash acquired — — — — (181 ) — (181 ) Proceeds from sales of businesses and investments — — — — 208 — 208 Purchases of investments (25 ) — — (67 ) (1,605 ) — (1,697 ) Other — — — — 86 — 86 Net cash provided by (used in) investing activities 10,251 (293 ) 217 2,816 (23,903 ) — (10,912 ) Financing Activities: Proceeds from (repayments of) short-term borrowings, net — — — — (1,288 ) — (1,288 ) Proceeds from borrowings — — — — 516 — 516 Proceeds from collateralized obligation — — — — 5,175 — 5,175 Repurchases and repayments of debt (5,513 ) — — (2,008 ) (2,454 ) — (9,975 ) Repurchases of common stock under repurchase program and employee plans (432 ) — — — — — (432 ) Dividends paid (2,778 ) — — — — — (2,778 ) Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock — — — — (235 ) — (235 ) Other (5 ) — — (40 ) 236 — 191 Net cash provided by (used in) financing activities (8,728 ) — — (2,048 ) 1,950 — (8,826 ) Impact of foreign currency on cash, cash equivalents and restricted cash (1 ) — — — (30 ) — (31 ) Increase (decrease) in cash, cash equivalents and restricted cash — — — (142 ) (165 ) — (307 ) Cash, cash equivalents and restricted cash, beginning of period — — — 416 3,493 — 3,909 Cash, cash equivalents and restricted cash, end of period $ — $ — $ — $ 274 $ 3,328 $ — $ 3,602 Condensed Consolidating Statement of Cash Flows For the Nine Months Ended September 30, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Net cash provided by (used in) operating activities $ (1,461 ) $ 137 $ (206 ) $ (1,047 ) $ 21,084 $ — $ 18,507 Investing Activities: Net transactions with affiliates (1,087 ) (586 ) 206 800 667 — — Capital expenditures (15 ) — — — (6,592 ) — (6,607 ) Cash paid for intangible assets (3 ) — — — (1,372 ) — (1,375 ) Acquisitions and construction of real estate properties (94 ) — — — (35 ) — (129 ) Construction of Universal Beijing Resort — — — — (257 ) — (257 ) Acquisitions, net of cash acquired — — — — (88 ) — (88 ) Proceeds from sales of investments — — — 67 60 — 127 Purchases of investments (118 ) — — (50 ) (672 ) — (840 ) Other — 449 — — 130 — 579 Net cash provided by (used in) investing activities (1,317 ) (137 ) 206 817 (8,159 ) — (8,590 ) Financing Activities: Proceeds from (repayments of) short-term borrowings, net 2,117 — — — 792 — 2,909 Proceeds from borrowings 9,386 — — — 464 — 9,850 Repurchases and repayments of debt (1,900 ) — — (3 ) (2,502 ) — (4,405 ) Repurchases of common stock under repurchase program and employee plans (4,282 ) — — — — — (4,282 ) Dividends paid (2,487 ) — — — — — (2,487 ) Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock — — — — (209 ) — (209 ) Other (56 ) — — — (186 ) — (242 ) Net cash provided by (used in) financing activities 2,778 — — (3 ) (1,641 ) — 1,134 Increase (decrease) in cash, cash equivalents and restricted cash — — — (233 ) 11,284 — 11,051 Cash, cash equivalents and restricted cash, beginning of period — — — 496 3,075 — 3,571 Cash, cash equivalents and restricted cash, end of period $ — $ — $ — $ 263 $ 14,359 $ — $ 14,622 Condensed Consolidating Balance Sheet September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Assets Cash and cash equivalents $ — $ — $ — $ 274 $ 3,233 $ — $ 3,507 Receivables, net — — — — 10,684 — 10,684 Programming rights — — — — 3,457 — 3,457 Other current assets 128 22 — 23 4,502 — 4,675 Total current assets 128 22 — 297 21,876 — 22,323 Film and television costs — — — — 8,647 — 8,647 Investments 275 12 159 1,039 5,988 — 7,473 Investment securing collateralized obligation — — — — 816 — 816 Investments in and amounts due from subsidiaries eliminated upon consolidation 158,369 149,186 132,753 54,857 98,744 (593,909 ) — Property and equipment, net 664 — — — 46,126 — 46,790 Franchise rights — — — — 59,365 — 59,365 Goodwill — — — — 66,913 — 66,913 Other intangible assets, net 8 — — — 35,156 — 35,164 Other noncurrent assets, net 1,025 166 — 95 8,014 (417 ) 8,883 Total assets $ 160,469 $ 149,386 $ 132,912 $ 56,288 $ 351,645 $ (594,326 ) $ 256,374 Liabilities and Equity Accounts payable and accrued expenses related to trade creditors $ — $ — $ — $ — $ 10,198 $ — $ 10,198 Accrued participations and residuals — — — — 1,615 — 1,615 Deferred revenue — — — — 2,944 — 2,944 Accrued expenses and other current liabilities 2,421 244 256 415 6,857 — 10,193 Current portion of long-term debt — — — 7 1,032 — 1,039 Total current liabilities 2,421 244 256 422 22,646 — 25,989 Long-term debt, less current portion 76,654 152 2,100 5,751 15,190 — 99,847 Collateralized obligation — — — — 5,165 — 5,165 Deferred income taxes — 344 — 68 28,142 (562 ) 27,992 Other noncurrent liabilities 3,250 — — 1,555 11,903 145 16,853 Redeemable noncontrolling interests and redeemable subsidiary preferred stock — — — — 1,368 — 1,368 Equity: Common stock 54 — — — — — 54 Other shareholders’ equity 78,090 148,646 130,556 48,492 266,215 (593,909 ) 78,090 Total Comcast Corporation shareholders’ equity 78,144 148,646 130,556 48,492 266,215 (593,909 ) 78,144 Noncontrolling interests — — — — 1,016 — 1,016 Total equity 78,144 148,646 130,556 48,492 267,231 (593,909 ) 79,160 Total liabilities and equity $ 160,469 $ 149,386 $ 132,912 $ 56,288 $ 351,645 $ (594,326 ) $ 256,374 Condensed Consolidating Balance Sheet December 31, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Assets Cash and cash equivalents $ — $ — $ — $ 416 $ 3,398 $ — $ 3,814 Receivables, net — — — — 11,104 — 11,104 Programming rights — — — — 3,746 — 3,746 Other current assets 66 20 — 28 3,070 — 3,184 Total current assets 66 20 — 444 21,318 — 21,848 Film and television costs — — — — 7,837 — 7,837 Investments 270 11 143 790 6,669 — 7,883 Investments in and amounts due from subsidiaries eliminated upon consolidation 157,264 147,028 130,214 53,853 97,872 (586,231 ) — Property and equipment, net 670 — — — 43,767 — 44,437 Franchise rights — — — — 59,365 — 59,365 Goodwill — — — — 66,154 — 66,154 Other intangible assets, net 11 — — — 38,347 — 38,358 Other noncurrent assets, net 1,057 208 — 85 4,910 (458 ) 5,802 Total assets $ 159,338 $ 147,267 $ 130,357 $ 55,172 $ 346,239 $ (586,689 ) $ 251,684 Liabilities and Equity Accounts payable and accrued expenses related to trade creditors $ 2 $ — $ — $ — $ 8,492 $ — $ 8,494 Accrued participations and residuals — — — — 1,808 — 1,808 Deferred revenue — — — — 2,182 — 2,182 Accrued expenses and other current liabilities 2,357 150 360 282 7,572 — 10,721 Current portion of long-term debt 699 — — 4 3,695 — 4,398 Total current liabilities 3,058 150 360 286 23,749 — 27,603 Long-term debt, less current portion 81,661 146 2,100 7,748 15,690 — 107,345 Deferred income taxes — 314 — 65 27,734 (524 ) 27,589 Other noncurrent liabilities 3,006 — — 1,201 11,056 66 15,329 Redeemable noncontrolling interests and redeemable subsidiary preferred stock — — — — 1,316 — 1,316 Equity: Common stock 54 — — — — — 54 Other shareholders’ equity 71,559 146,657 127,897 45,872 265,805 (586,231 ) 71,559 Total Comcast Corporation shareholders’ equity 71,613 146,657 127,897 45,872 265,805 (586,231 ) 71,613 Noncontrolling interests — — — — 889 — 889 Total equity 71,613 146,657 127,897 45,872 266,694 (586,231 ) 72,502 Total liabilities and equity $ 159,338 $ 147,267 $ 130,357 $ 55,172 $ 346,239 $ (586,689 ) $ 251,684

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Line Items]
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 2018 Annual Report on Form 10-K and the notes within this Form 10-Q.
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	Leases In February 2016, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to leases. The most significant change in the updated accounting guidance requires lessees to recognize lease assets and liabilities on the balance sheet for all operating leases with the exception of short-term leases. The standard also expands the disclosures regarding the amount, timing and uncertainty of cash flows arising from leases. For a lessee, the recognition, measurement and presentation of expenses and cash flows arising from a lease did not significantly change from previous guidance. We adopted the updated guidance on January 1, 2019 on a prospective basis and as a result, prior period amounts were not adjusted to reflect the impacts of the updated guidance. In addition, as permitted under the transition guidance within the new standard, prior scoping and classification conclusions were carried forward for leases existing as of the adoption date. Upon adoption, we recorded $4.2 billion and $4.8 billion for operating lease assets and liabilities, respectively, which includes the impact of fair value adjustments, prepaid and deferred rent and lease incentives. The adoption of the updated accounting guidance did not significantly impact our recognition of finance leases, which were previously described as capital leases. As of the date of adoption, our liabilities for finance leases were $787 million , including $229 million of additional contracts determined to be leases in connection with the Sky transaction , which were recorded in long-term debt, and the related assets were recorded in property and equipment, net. Our finance leases were not considered material for further disclosure. The adoption of the new accounting guidance did not have a material impact on our consolidated results of operations or cash flows. See Note 12 for further information. Film and Television Costs In March 2019, the FASB updated the accounting guidance related to film and television costs. The updated guidance aligns 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 updated guidance also updates certain presentation and disclosure requirements for capitalized film and television costs, and requires impairment testing to be performed at a group level for capitalized film and television costs when the content is predominantly monetized with other owned or licensed content. The updated guidance is effective for us as of January 1, 2020 and early adoption is permitted. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements.
Leases	Our leases consist primarily of real estate, vehicles and other equipment. We determine if an arrangement is a lease at inception. Lease assets and liabilities are recognized upon commencement of the lease based on the present value of the future minimum lease payments over the lease term. The lease term includes options to extend the lease when it is reasonably certain that we will exercise that option. We generally utilize our incremental borrowing rate based on information available at the commencement of the lease in determining the present value of future payments. The lease asset also includes any lease payments made and initial direct costs incurred and excludes lease incentives. Lease assets and liabilities are not recorded for leases with an initial term of one year or less. Lease expense for operating leases recorded in the balance sheet is included in operating costs and expenses and is based on the future minimum lease payments recognized on a straight-line basis over the term of the lease plus any variable lease costs. Operating lease expenses, inclusive of short-term and variable lease expenses, recognized in our condensed consolidated statement of income for the three and nine months ended September 30, 2019 were $268 million and $806 million , respectively. These amounts do not include lease costs associated with production activities or other amounts capitalized in our condensed consolidated balance sheet, which are not material.
NBCUniversal Media LLC [Member]
Accounting Policies [Line Items]
Basis of Presentation	Unless indicated otherwise, throughout these notes to the condensed consolidated financial statements, we refer to NBCUniversal and its consolidated subsidiaries as “we,” “us” and “our.” 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 2018 Annual Report on Form 10-K and the notes within this Form 10-Q.
Recent Accounting Pronouncements	Leases In February 2016, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to leases. The most significant change in the updated accounting guidance requires lessees to recognize lease assets and liabilities on the balance sheet for all operating leases with the exception of short-term leases. The standard also expands the disclosures regarding the amount, timing and uncertainty of cash flows arising from leases. For a lessee, the recognition, measurement and presentation of expenses and cash flows arising from a lease did not significantly change from previous guidance. We adopted the updated guidance on January 1, 2019 on a prospective basis and as a result, prior period amounts were not adjusted to reflect the impacts of the updated guidance. In addition, as permitted under the transition guidance within the new standard, prior scoping and classification conclusions were carried forward for leases existing as of the adoption date. Upon adoption, we recorded approximately $1.7 billion and $1.8 billion of operating lease assets and liabilities, respectively, which includes the impact of fair value adjustments, prepaid rent and lease incentives. The adoption of the updated accounting guidance did not impact our recognition of finance leases, which were previously described as capital leases. As of the date of adoption, our liabilities for finance leases were $332 million , which were recorded in long-term debt, and the related assets were recorded in property and equipment, net. Our finance leases were not considered material for further disclosure. The adoption of the new accounting guidance did not have a material impact on our consolidated results of operations or cash flows. See Note 9 for further information. Film and Television Costs In March 2019, the FASB updated the accounting guidance related to film and television costs. The updated guidance aligns 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 updated guidance also updates certain presentation and disclosure requirements for capitalized film and television costs, and requires impairment testing to be performed at a group level for capitalized film and television costs when the content is predominantly monetized with other owned or licensed content. The updated guidance is effective for us as of January 1, 2020 and early adoption is permitted. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements.
Leases	Our leases consist primarily of real estate and equipment. We determine if an arrangement is a lease at inception. Lease assets and liabilities are recognized upon commencement of the lease based on the present value of the future minimum lease payments over the lease term. The lease term includes options to extend the lease when it is reasonably certain that we will exercise that option. We generally utilize our incremental borrowing rate based on information available at the commencement of the lease in determining the present value of future payments. The lease asset also includes any lease payments made and initial direct costs incurred and excludes lease incentives. Lease assets and liabilities are not recorded for leases with an initial term of one year or less. Lease expense for operating leases recorded in the balance sheet is included in operating costs and expenses and is based on the future minimum lease payments recognized on a straight-line basis over the term of the lease plus any variable lease costs. Operating lease expenses, inclusive of short-term and variable lease expenses, recognized in our condensed consolidated statement of income for the three and nine months ended September 30, 2019 were $110 million and $331 million , respectively. These amounts do not include lease costs associated with production activities or other amounts capitalized in our condensed consolidated balance sheet, which are not material.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting Information [Line Items]
Financial Data by Business Segment	Our financial data by business segment is presented in the tables below. Three Months Ended September 30, 2019 (in millions) Revenue Adjusted EBITDA (d) Depreciation and Amortization Capital 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 Three Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (d) Depreciation and Amortization Capital Cash Paid for Intangible Assets Cable Communications $ 14,023 $ 5,434 $ 2,077 $ 1,945 $ 367 NBCUniversal Cable Networks 2,850 959 180 11 6 Broadcast Television 2,452 321 32 37 — Filmed Entertainment 1,819 214 26 9 6 Theme Parks 1,528 725 170 269 23 Headquarters and Other (a) 15 (161 ) 106 79 43 Eliminations (b) (68 ) (1 ) — — — NBCUniversal 8,596 2,057 514 405 78 Corporate and Other (c) 73 (188 ) 27 34 — Eliminations (b) (557 ) 10 — — — Comcast Consolidated $ 22,135 $ 7,313 $ 2,618 $ 2,384 $ 445 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 Nine Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (d) Depreciation and Amortization Capital Expenditures Cash Paid for Intangible Assets Cable Communications $ 41,638 $ 16,100 $ 6,161 $ 5,403 $ 998 NBCUniversal Cable Networks (e) 8,881 3,389 548 22 15 Broadcast Television (e) 8,340 1,245 106 99 75 Filmed Entertainment 5,176 555 117 24 20 Theme Parks 4,170 1,789 492 811 158 Headquarters and Other (a) 44 (497 ) 314 179 106 Eliminations (b)(e) (245 ) (3 ) — — — NBCUniversal 26,366 6,478 1,577 1,135 374 Corporate and Other (c) 412 (566 ) 82 69 3 Eliminations (b)(e) (1,755 ) (38 ) — — — Comcast Consolidated $ 66,661 $ 21,974 $ 7,820 $ 6,607 $ 1,375 (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. The most common types of transactions are the following: • our Cable Networks segment generates revenue by selling programming to our Cable Communications segment, which represents a substantial majority of the revenue elimination amount • our Broadcast Television segment generates revenue from the fees received under retransmission consent agreements with our Cable Communications segment • our Cable Communications segment generates revenue by selling advertising and by selling the use of satellite feeds to our Cable Networks segment • our Cable Networks and Broadcast Television segments generate revenue by selling advertising to our Cable Communications segment • our Filmed Entertainment and Broadcast Television segments generate revenue by licensing content to our Cable Networks segment; for segment reporting, this revenue is recognized as the programming rights asset for the licensed content is amortized based on third party revenue • our Filmed Entertainment, Cable Networks and Broadcast Television segments generate revenue by licensing content to our Sky segment (c) Corporate and Other activities include costs associated with overhead and personnel, revenue and expenses associated with 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 the development of Peacock, NBCUniversal’s direct-to-consumer streaming service. (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 Nine Months Ended (in millions) 2019 2018 2019 2018 Adjusted EBITDA $ 8,553 $ 7,313 $ 25,822 $ 21,974 Adjustment for Sky transaction-related costs (33 ) — (168 ) — Depreciation (2,124 ) (2,038 ) (6,561 ) (6,070 ) Amortization (1,056 ) (580 ) (3,215 ) (1,750 ) Other operating gains — 141 — 341 Interest expense (1,167 ) (830 ) (3,454 ) (2,413 ) Investment and other income (loss), net (110 ) (111 ) 511 92 Income before income taxes $ 4,063 $ 3,895 $ 12,935 $ 12,174 (e) The re venue and operating costs and expenses associated with our broadcast of the 2018 PyeongChang Olympics were reported in our Cable Networks and Broadcast Television segments. The revenue and operating costs and expenses associated with our broadcast of the 2018 Super Bowl were reported in our Broadcast Television segment. Included in Eliminations are transactions relating to these events that our Broadcast Television and Cable Networks segments enter into with our other segments.
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 Nine Months Ended (in millions) 2019 2018 2019 2018 Adjusted EBITDA $ 8,553 $ 7,313 $ 25,822 $ 21,974 Adjustment for Sky transaction-related costs (33 ) — (168 ) — Depreciation (2,124 ) (2,038 ) (6,561 ) (6,070 ) Amortization (1,056 ) (580 ) (3,215 ) (1,750 ) Other operating gains — 141 — 341 Interest expense (1,167 ) (830 ) (3,454 ) (2,413 ) Investment and other income (loss), net (110 ) (111 ) 511 92 Income before income taxes $ 4,063 $ 3,895 $ 12,935 $ 12,174
NBCUniversal Media LLC [Member]
Segment Reporting Information [Line Items]
Financial Data by Business Segment	We use Adjusted EBITDA to evaluate the profitability of our operating segments and the components of net income attributable to NBCUniversal excluded from Adjusted EBITDA are not separately evaluated. To be consistent with our current management reporting presentation, 2018 operating results were reclassified related to certain NBCUniversal businesses now presented in Headquarters and Other. Our financial data by business segment is presented in the tables below. Three Months Ended September 30, 2019 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Cash Paid for Intangible Assets 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 (133 ) 114 55 43 Eliminations (b) (65 ) 3 — — — Total $ 8,294 $ 2,089 $ 537 $ 505 $ 63 Three Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Cash Paid for Intangible Assets Cable Networks $ 2,850 $ 959 $ 180 $ 11 $ 6 Broadcast Television 2,452 321 32 37 — Filmed Entertainment 1,819 214 26 9 6 Theme Parks 1,528 725 170 269 23 Headquarters and Other (a) 49 (152 ) 106 79 43 Eliminations (b) (73 ) (1 ) — — — Total $ 8,625 $ 2,066 $ 514 $ 405 $ 78 Nine Months Ended September 30, 2019 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Expenditures Cash Paid for Intangible Assets 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) 117 (492 ) 341 139 120 Eliminations (b) (238 ) 1 — — — Total $ 24,866 $ 6,747 $ 1,579 $ 1,431 $ 199 Nine Months Ended September 30, 2018 (in millions) Revenue Adjusted EBITDA (c) Depreciation and Amortization Capital Expenditures Cash Paid for Intangible Assets Cable Networks (d) $ 8,881 $ 3,389 $ 548 $ 22 $ 15 Broadcast Television (d) 8,340 1,245 106 99 75 Filmed Entertainment 5,176 555 117 24 20 Theme Parks 4,170 1,789 492 811 158 Headquarters and Other (a) 157 (464 ) 314 179 106 Eliminations (b)(d) (256 ) (3 ) — — — Total $ 26,468 $ 6,511 $ 1,577 $ 1,135 $ 374 (a) 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, which consisted primarily of the licensing of film and television content from our Filmed Entertainment and Broadcast Television segments to our Cable Networks segment; for segment reporting, this revenue is recognized as the programming rights asset for the licensed content is amortized based on third party revenue. (c) We use Adjusted EBITDA as the measure of profit or loss for our operating segments. Adjusted EBITDA is defined as net income attributable to NBCUniversal before net income (loss) attributable to noncontrolling interests, 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 Nine Months Ended (in millions) 2019 2018 2019 2018 Adjusted EBITDA $ 2,089 $ 2,066 $ 6,747 $ 6,511 Depreciation (259 ) (250 ) (755 ) (750 ) Amortization (278 ) (264 ) (824 ) (827 ) Other operating gains — 141 — 141 Interest expense (348 ) (134 ) (601 ) (394 ) Investment and other income (loss), net 169 (205 ) 449 (377 ) Income before income taxes $ 1,373 $ 1,354 $ 5,016 $ 4,304 (d) The rev enue and operating costs and expenses associated with our broadcast of the 2018 PyeongChang Olympics were reported in our Cable Networks and Broadcast Television segments. The revenue and operating costs and expenses associated with our broadcast of the 2018 Super Bowl were reported in our Broadcast Television segment. Included in Eliminations are transactions relating to these events that our Broadcast Television and Cable Networks segments entered into with our other segments.
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 Nine Months Ended (in millions) 2019 2018 2019 2018 Adjusted EBITDA $ 2,089 $ 2,066 $ 6,747 $ 6,511 Depreciation (259 ) (250 ) (755 ) (750 ) Amortization (278 ) (264 ) (824 ) (827 ) Other operating gains — 141 — 141 Interest expense (348 ) (134 ) (601 ) (394 ) Investment and other income (loss), net 169 (205 ) 449 (377 ) Income before income taxes $ 1,373 $ 1,354 $ 5,016 $ 4,304

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue [Line Items]
Disaggregation of revenue	Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Residential: High-speed internet $ 4,721 $ 4,321 $ 13,961 $ 12,740 Video 5,541 5,591 16,763 16,878 Voice 963 982 2,935 2,982 Wireless 326 236 795 623 Business services 1,971 1,803 5,795 5,290 Advertising 603 684 1,766 1,932 Other 459 406 1,299 1,193 Total Cable Communications (a)(b) 14,584 14,023 43,314 41,638 Distribution 1,681 1,655 5,123 5,166 Advertising 809 812 2,592 2,718 Content licensing and other 281 383 871 997 Total Cable Networks 2,771 2,850 8,586 8,881 Advertising 1,191 1,355 3,837 5,107 Content licensing 447 538 1,479 1,541 Distribution and other 592 559 1,783 1,692 Total Broadcast Television 2,230 2,452 7,099 8,340 Theatrical 549 601 1,246 1,564 Content licensing 737 719 2,266 2,100 Home entertainment 185 260 681 733 Other 235 239 738 779 Total Filmed Entertainment 1,706 1,819 4,931 5,176 Total Theme Parks 1,631 1,528 4,371 4,170 Headquarters and Other 21 15 60 44 Eliminations (c) (64 ) (68 ) (233 ) (245 ) Total NBCUniversal 8,295 8,596 24,814 26,366 Direct-to-consumer 3,793 — 11,516 — Content 315 — 1,061 — Advertising 446 — 1,602 — Total Sky 4,554 — 14,179 — Corporate and Other (b) 42 73 206 412 Eliminations (c) (648 ) (557 ) (1,969 ) (1,755 ) Total revenue $ 26,827 $ 22,135 $ 80,544 $ 66,661 (a) For both the three and nine months ended September 30, 2019 , 2.6% of Cable Communications segment revenue was derived from franchise and other regulatory fees. For the three and nine months ended September 30, 2018 , 2.6% and 2.7% , respectively, of Cable Communications segment revenue was derived from franchise and other regulatory fees. (b) Comcast Cable’s wireless phone service is now presented in the Cable Communications segment. Results were previously presented in Corporate and Other. We recognize revenue from our wireless phone service as the services are provided, similar to how we recognize revenue for other residential cable services. We recognize revenue from the sale of handsets at the point of sale. (c) 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 Nine Months Ended (in millions) 2019 2018 2019 2018 United States $ 20,398 $ 20,244 $ 61,394 $ 61,060 Europe 5,211 825 15,878 2,345 Other 1,218 1,066 3,272 3,256 Total revenue $ 26,827 $ 22,135 $ 80,544 $ 66,661
Schedule of receivables, net	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, December 31, Receivables, gross $ 11,159 $ 11,456 Less: Allowance for doubtful accounts 475 352 Receivables, net $ 10,684 $ 11,104
Other balance sheet accounts	(in millions) September 30, December 31, Noncurrent receivables, net (included in other noncurrent assets, net) $ 1,261 $ 1,399 Contract acquisition and fulfillment costs (included in other noncurrent assets, net) $ 1,055 $ 991 Noncurrent deferred revenue (included in other noncurrent liabilities) $ 663 $ 650
NBCUniversal Media LLC [Member]
Revenue [Line Items]
Disaggregation of revenue	Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Distribution $ 1,681 $ 1,655 $ 5,123 $ 5,166 Advertising 809 812 2,592 2,718 Content licensing and other 281 383 871 997 Total Cable Networks 2,771 2,850 8,586 8,881 Advertising 1,191 1,355 3,837 5,107 Content licensing 447 538 1,479 1,541 Distribution and other 592 559 1,783 1,692 Total Broadcast Television 2,230 2,452 7,099 8,340 Theatrical 549 601 1,246 1,564 Content licensing 737 719 2,266 2,100 Home entertainment 185 260 681 733 Other 235 239 738 779 Total Filmed Entertainment 1,706 1,819 4,931 5,176 Total Theme Parks 1,631 1,528 4,371 4,170 Headquarters and Other 21 49 117 157 Eliminations (a) (65 ) (73 ) (238 ) (256 ) Total revenue $ 8,294 $ 8,625 $ 24,866 $ 26,468 (a) 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 primarily in Europe and Asia. The table below summarizes revenue by geographic location. Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 United States $ 6,382 $ 6,758 $ 19,674 $ 20,945 Foreign 1,912 1,867 5,192 5,523 Total revenue $ 8,294 $ 8,625 $ 24,866 $ 26,468
Schedule of receivables, net	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 . (in millions) September 30, December 31, Receivables, gross $ 7,139 $ 7,392 Less: Allowance for doubtful accounts 99 99 Receivables, net $ 7,040 $ 7,293
Other balance sheet accounts	(in millions) September 30, December 31, Noncurrent receivables, net (included in other noncurrent assets, net) $ 1,097 $ 1,180 Noncurrent deferred revenue (included in other noncurrent liabilities) $ 422 $ 481

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Computation of diluted EPS	Computation of Diluted EPS Three Months Ended September 30 2019 2018 (in millions, except per share data) Net Income Shares Per Share Net Income Shares Per Share Basic EPS attributable to Comcast Corporation shareholders $ 3,217 4,551 $ 0.71 $ 2,886 4,564 $ 0.63 Effect of dilutive securities: Assumed exercise or issuance of shares relating to stock plans 68 55 Diluted EPS attributable to Comcast Corporation shareholders $ 3,217 4,619 $ 0.70 $ 2,886 4,619 $ 0.62 Nine Months Ended September 30 2019 2018 (in millions, except per share data) Net Income Shares Per Share Net Income Shares Per Share Basic EPS attributable to Comcast Corporation shareholders $ 9,895 4,544 $ 2.18 $ 9,220 4,599 $ 2.00 Effect of dilutive securities: Assumed exercise or issuance of shares relating to stock plans 62 56 Diluted EPS attributable to Comcast Corporation shareholders $ 9,895 4,606 $ 2.15 $ 9,220 4,655 $ 1.98

Significant Transactions (Table

Significant Transactions (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Allocation of Purchase Price	The table below presents the allocation of the all-cash purchase price of £30.2 billion , or $39.4 billion , to the assets and liabilities of Sky as a result of the transaction. Allocation of Purchase Price (in millions) Consideration transferred $ 39,387 Allocation of purchase price Cash $ 1,283 Accounts receivable and other current assets 2,359 Film and television costs 2,512 Property and equipment 4,127 Intangible assets 19,539 Accounts payable, accrued liabilities and other current liabilities (5,885 ) Long-term debt (11,468 ) Deferred tax assets (liabilities), net (2,974 ) Other noncurrent assets and (liabilities), net (1,398 ) Fair value of identifiable net assets acquired 8,095 Goodwill $ 31,292
Amounts Related to Expenses Included in Consolidated Statement of Operations	The table below presents the amounts related to these expenses included in our condensed consolidated statement of income. (in millions) Three Months Ended Nine Months Ended Other operating and administrative expenses $ 8 $ 29 Interest expense $ 34 $ 45
Unaudited Pro Forma Information	The following unaudited pro forma information has been presented as if the Sky transaction occurred on January 1, 2017. This information is based on historical results of operations, adjusted for allocation of purchase price and other acquisition accounting adjustments, and is not necessarily indicative of what the results would have been had we operated the business since January 1, 2017. For pro forma purposes, 2018 earnings were adjusted to exclude the acquisition-related costs. No pro forma adjustments have been made for cost savings or synergies that have been or may be achieved by the combined businesses. (in millions, except per share data) Three Months Ended Nine Months Ended Revenue $ 26,824 $ 81,239 Net income attributable to Comcast Corporation $ 3,448 $ 9,388 Basic earnings per common share attributable to Comcast Corporation shareholders $ 0.75 $ 2.04 Diluted earnings per common share attributable to Comcast Corporation shareholders $ 0.74 $ 2.01

Film and Television Costs (Tabl

Film and Television Costs (Tables)	9 Months Ended
	Sep. 30, 2019
Film And Television Costs [Line Items]
Film and Television Costs	(in millions) September 30, December 31, Film Costs: Released, less amortization $ 1,615 $ 1,600 Completed, not released 124 144 In production and in development 1,282 1,063 3,021 2,807 Television Costs: Released, less amortization 2,514 2,289 In production and in development 1,228 953 3,742 3,242 Programming rights, less amortization 5,341 5,534 12,104 11,583 Less: Current portion of programming rights 3,457 3,746 Film and television costs $ 8,647 $ 7,837
NBCUniversal Media LLC [Member]
Film And Television Costs [Line Items]
Film and Television Costs	(in millions) September 30, December 31, Film Costs: Released, less amortization $ 1,615 $ 1,600 Completed, not released 124 144 In production and in development 1,282 1,063 3,021 2,807 Television Costs: Released, less amortization 2,410 2,161 In production and in development 1,228 953 3,638 3,114 Programming rights, less amortization 2,578 2,694 9,237 8,615 Less: Current portion of programming rights 1,461 1,323 Film and television costs $ 7,776 $ 7,292

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2019
Investments [Line Items]
Investment and Other Income (Loss), Net	Investment and Other Income (Loss), Net Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Equity in net income (losses) of investees, net $ (355 ) $ (76 ) $ (295 ) $ (56 ) Realized and unrealized gains (losses) on equity securities, net 174 (38 ) 582 (50 ) Other income (loss), net 71 3 224 198 Investment and other income (loss), net $ (110 ) $ (111 ) $ 511 $ 92
Investment Summary	(in millions) September 30, December 31, Equity method $ 5,363 $ 4,035 Marketable equity securities 862 341 Nonmarketable equity securities 1,933 1,805 Other investments 1,841 1,796 Total investments 9,999 7,977 Less: Current investments 1,710 94 Less: Investment securing collateralized obligation 816 — Noncurrent investments $ 7,473 $ 7,883
NBCUniversal Media LLC [Member]
Investments [Line Items]
Investment and Other Income (Loss), Net	Investment and Other Income (Loss), Net Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Equity in net income (losses) of investees, net $ (88 ) $ (119 ) $ (299 ) $ (306 ) Realized and unrealized gains (losses) on equity securities, net 178 (91 ) 436 (128 ) Other income (loss), net 79 5 312 57 Investment and other income (loss), net $ 169 $ (205 ) $ 449 $ (377 )
Investment Summary	(in millions) September 30, December 31, Equity method $ 1,290 $ 707 Marketable equity securities 725 162 Nonmarketable equity securities 794 811 Total investments 2,809 1,680 Less: Investment securing collateralized obligation 816 — Noncurrent investments $ 1,993 $ 1,680

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	NBCUniversal (in millions) Cable Cable Broadcast Filmed Theme Sky Corporate Total Balance, December 31, 2018 $ 12,784 $ 13,407 $ 843 $ 3,184 $ 6,684 $ 29,250 $ 2 $ 66,154 Acquisitions 131 — 13 — — 10 — 154 Dispositions — — — — — (12 ) — (12 ) Adjustments (a) 2,166 490 199 138 — (1,555 ) 2 1,440 Foreign currency translation (116 ) (34 ) (11 ) (11 ) 106 (757 ) — (823 ) Balance, September 30, 2019 $ 14,965 $ 13,863 $ 1,044 $ 3,311 $ 6,790 $ 26,936 $ 4 $ 66,913 (a) Adjustments during the nine months ended September 30, 2019 primarily included 1) measurement period adjustments resulting from finalization of acquisition accounting for Sky and 2) the final assignment of goodwill resulting from the Sky transaction to our reporting units.

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	9 Months Ended
	Sep. 30, 2019
Supplemental Financial Information [Line Items]
Schedule of operating lease assets and liabilities	(in millions) September 30, December 31, Noncurrent receivables, net (included in other noncurrent assets, net) $ 1,261 $ 1,399 Contract acquisition and fulfillment costs (included in other noncurrent assets, net) $ 1,055 $ 991 Noncurrent deferred revenue (included in other noncurrent liabilities) $ 663 $ 650
Schedule of future minimum rental commitments for operating leases under new accounting guidance	The table below summarizes our future minimum rental commitments for operating leases as of September 30, 2019 applying the new accounting guidance. (in millions) September 30, Remaining three months of 2019 $ 182 2020 880 2021 763 2022 633 2023 530 Thereafter 2,606 Total future minimum lease payments 5,594 Less: imputed interest 1,035 Total liability $ 4,559
Schedule of future minimum rental commitments and rent expense for operating leases under previous accounting guidance	The tables below summarize our future minimum rental commitments for operating leases as of December 31, 2018 and rent expense for operating leases for the three and nine months ended September 30, 2018 using the accounting guidance in effect at that time. These amounts have been updated to include $804 million of future cash payments related to additional contracts determined to be operating leases in connection with the Sky transaction. (in millions) December 31, 2019 $ 891 2020 $ 824 2021 $ 722 2022 $ 592 2023 $ 513 Thereafter $ 2,608 (in millions) Three Months Ended Nine Months Ended Rental expense $ 178 $ 548
Schedule of recognized share-based compensation expense	Recognized Share-Based Compensation Expense Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Restricted share units $ 143 $ 94 $ 437 $ 279 Stock options 57 50 176 155 Employee stock purchase plans 8 7 23 24 Total $ 208 $ 151 $ 636 $ 458
Schedule of cash payments for interest and income taxes	Cash Payments for Interest and Income Taxes Nine Months Ended (in millions) 2019 2018 Interest $ 3,167 $ 2,240 Income taxes $ 2,490 $ 1,533
Schedule of 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, December 31, Cash and cash equivalents $ 3,507 $ 3,814 Restricted cash included in other current assets 47 46 Restricted cash included in other noncurrent assets, net 48 49 Cash, cash equivalents and restricted cash, end of period $ 3,602 $ 3,909
Schedule of accumulated other comprehensive income (loss)	Accumulated Other Comprehensive Income (Loss) (in millions) September 30, September 30, Unrealized gains (losses) on marketable securities $ 7 $ 2 Deferred gains (losses) on cash flow hedges 162 28 Unrecognized gains (losses) on employee benefit obligations 301 294 Cumulative translation adjustments (1,629 ) 50 Accumulated other comprehensive income (loss), net of deferred taxes $ (1,159 ) $ 374
NBCUniversal Media LLC [Member]
Supplemental Financial Information [Line Items]
Schedule of operating lease assets and liabilities	(in millions) September 30, December 31, Noncurrent receivables, net (included in other noncurrent assets, net) $ 1,097 $ 1,180 Noncurrent deferred revenue (included in other noncurrent liabilities) $ 422 $ 481
Schedule of future minimum rental commitments for operating leases under new accounting guidance	The table below summarizes our future minimum rental commitments for operating leases as of September 30, 2019 applying the new accounting guidance. (in millions) September 30, Remaining three months of 2019 $ 56 2020 258 2021 223 2022 185 2023 159 Thereafter 1,473 Total future minimum lease payments 2,354 Less: imputed interest 657 Total liability $ 1,697
Schedule of future minimum rental commitments and rent expense for operating leases under previous accounting guidance	The tables below summarize our future minimum rental commitments for operating leases as of December 31, 2018 and rent expense for operating leases for the three and nine months ended September 30, 2018 using the accounting guidance in effect at that time. (in millions) December 31, 2019 $ 248 2020 $ 232 2021 $ 199 2022 $ 168 2023 $ 144 Thereafter $ 1,380 (in millions) Three Months Ended Nine Months Ended Rental expense $ 69 $ 212
Schedule of cash payments for interest and income taxes	Cash Payments for Interest and Income Taxes Nine Months Ended (in millions) 2019 2018 Interest $ 314 $ 253 Income taxes $ 292 $ 373
Schedule of 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, December 31, Cash and cash equivalents $ 1,157 $ 1,444 Restricted cash included in other noncurrent assets, net 20 20 Cash, cash equivalents and restricted cash, end of period $ 1,177 $ 1,464
Schedule of accumulated other comprehensive income (loss)	Accumulated Other Comprehensive Income (Loss) (in millions) September 30, September 30, Deferred gains (losses) on cash flow hedges $ 9 $ 5 Unrecognized gains (losses) on employee benefit obligations 131 115 Cumulative translation adjustments 143 (22 ) Accumulated other comprehensive income (loss) $ 283 $ 98
NBCUniversal Media LLC [Member] | Accounting Standards Update 2016-02 [Member]
Supplemental Financial Information [Line Items]
Schedule of operating lease assets and liabilities	The table below summarizes the operating lease assets and liabilities recorded in our condensed consolidated balance sheet. Condensed Consolidated Balance Sheet (in millions) September 30, Other noncurrent assets, net $ 1,589 Accrued expenses and other current liabilities $ 183 Other noncurrent liabilities $ 1,514

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2019
NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Related Party Transactions Condensed Financial Statements	The following tables present transactions with Comcast and its consolidated subsidiaries that are included in our condensed consolidated financial statements. Condensed Consolidated Statement of Income Three Months Ended Nine Months Ended (in millions) 2019 2018 2019 2018 Transactions with Comcast and Consolidated Subsidiaries Revenue $ 597 $ 506 $ 1,808 $ 1,580 Total costs and expenses $ (73 ) $ (59 ) $ (198 ) $ (162 ) Interest expense and investment and other income (loss), net $ (162 ) $ (9 ) $ (148 ) $ (52 ) Condensed Consolidated Balance Sheet (in millions) September 30, December 31, Transactions with Comcast and Consolidated Subsidiaries Receivables, net $ 533 $ 464 Notes receivable from Comcast, current $ 4,192 $ 2,054 Film and television costs $ 21 $ 27 Note receivable from Comcast, noncurrent $ 1,101 $ — Other noncurrent assets, net $ 71 $ — Accounts payable and accrued expenses related to trade creditors $ 75 $ 78 Accrued expenses and other current liabilities $ 84 $ 32 Notes payable to Comcast $ 91 $ 54 Long-term debt (See Note 4) $ 158 $ 701 Other noncurrent liabilities $ 459 $ 410

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitment And Contingencies [Line Items]
Schedule of future minimum rental commitments for operating leases under new accounting guidance	The table below summarizes our future minimum rental commitments for operating leases as of September 30, 2019 applying the new accounting guidance. (in millions) September 30, Remaining three months of 2019 $ 182 2020 880 2021 763 2022 633 2023 530 Thereafter 2,606 Total future minimum lease payments 5,594 Less: imputed interest 1,035 Total liability $ 4,559
Schedule of future minimum rental commitments and rent expense for operating leases under previous accounting guidance	The tables below summarize our future minimum rental commitments for operating leases as of December 31, 2018 and rent expense for operating leases for the three and nine months ended September 30, 2018 using the accounting guidance in effect at that time. These amounts have been updated to include $804 million of future cash payments related to additional contracts determined to be operating leases in connection with the Sky transaction. (in millions) December 31, 2019 $ 891 2020 $ 824 2021 $ 722 2022 $ 592 2023 $ 513 Thereafter $ 2,608 (in millions) Three Months Ended Nine Months Ended Rental expense $ 178 $ 548
Accounting Standards Update 2016-02 [Member]
Commitment And Contingencies [Line Items]
Schedule of operating lease assets and liabilities	The table below summarizes the operating lease assets and liabilities recorded in our condensed consolidated balance sheet. Condensed Consolidated Balance Sheet (in millions) September 30, Other noncurrent assets, net $ 4,011 Accrued expenses and other current liabilities $ 696 Other noncurrent liabilities $ 3,863

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	9 Months Ended
	Sep. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Consolidating Statement of Income	Condensed Consolidating Statement of Income For the Three Months Ended September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 26,827 $ — $ 26,827 Management fee revenue 326 — 319 — — (645 ) — Total revenue 326 — 319 — 26,827 (645 ) 26,827 Costs and Expenses: Programming and production — — — — 8,316 — 8,316 Other operating and administrative 209 — 319 230 7,977 (645 ) 8,090 Advertising, marketing and promotion — — — — 1,901 — 1,901 Depreciation 14 — — — 2,110 — 2,124 Amortization 1 — — — 1,055 — 1,056 Total costs and expenses 224 — 319 230 21,359 (645 ) 21,487 Operating income (loss) 102 — — (230 ) 5,468 — 5,340 Interest expense (873 ) (3 ) (47 ) (140 ) (104 ) — (1,167 ) Investment and other income (loss), net 3,776 3,729 3,620 1,632 1,390 (14,257 ) (110 ) Income (loss) before income taxes 3,005 3,726 3,573 1,262 6,754 (14,257 ) 4,063 Income tax (expense) benefit 212 (2 ) 10 (6 ) (989 ) — (775 ) Net income (loss) 3,217 3,724 3,583 1,256 5,765 (14,257 ) 3,288 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 71 — 71 Net income (loss) attributable to Comcast Corporation $ 3,217 $ 3,724 $ 3,583 $ 1,256 $ 5,694 $ (14,257 ) $ 3,217 Comprehensive income (loss) attributable to Comcast Corporation $ 2,120 $ 3,722 $ 3,584 $ 1,244 $ 4,397 $ (12,947 ) $ 2,120 Condensed Consolidating Statement of Income For the Three Months Ended September 30, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 22,135 $ — $ 22,135 Management fee revenue 299 — 294 — — (593 ) — Total revenue 299 — 294 — 22,135 (593 ) 22,135 Costs and Expenses: Programming and production — — — — 6,711 — 6,711 Other operating and administrative 208 — 294 230 6,305 (593 ) 6,444 Advertising, marketing and promotion — — — — 1,667 — 1,667 Depreciation 12 — — — 2,026 — 2,038 Amortization 1 — — — 579 — 580 Other operating gains — — — — (141 ) — (141 ) Total costs and expenses 221 — 294 230 17,147 (593 ) 17,299 Operating income (loss) 78 — — (230 ) 4,988 — 4,836 Interest expense (600 ) (3 ) (48 ) (113 ) (66 ) — (830 ) Investment and other income (loss), net 3,299 3,380 3,007 1,576 1,065 (12,438 ) (111 ) Income (loss) before income taxes 2,777 3,377 2,959 1,233 5,987 (12,438 ) 3,895 Income tax (expense) benefit 109 (1 ) 10 (2 ) (1,115 ) — (999 ) Net income (loss) 2,886 3,376 2,969 1,231 4,872 (12,438 ) 2,896 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 10 — 10 Net income (loss) attributable to Comcast Corporation $ 2,886 $ 3,376 $ 2,969 $ 1,231 $ 4,862 $ (12,438 ) $ 2,886 Comprehensive income (loss) attributable to Comcast Corporation $ 2,799 $ 3,349 $ 2,974 $ 1,112 $ 4,663 $ (12,098 ) $ 2,799 Condensed Consolidating Statement of Income For the Nine Months Ended September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 80,544 $ — $ 80,544 Management fee revenue 940 — 921 — — (1,861 ) — Total revenue 940 — 921 — 80,544 (1,861 ) 80,544 Costs and Expenses: Programming and production — — — — 25,140 — 25,140 Other operating and administrative 575 — 921 726 23,715 (1,861 ) 24,076 Advertising, marketing and promotion — — — — 5,674 — 5,674 Depreciation 44 — — — 6,517 — 6,561 Amortization 4 — — — 3,211 — 3,215 Total costs and expenses 623 — 921 726 64,257 (1,861 ) 64,666 Operating income (loss) 317 — — (726 ) 16,287 — 15,878 Interest expense (2,646 ) (9 ) (143 ) (377 ) (279 ) — (3,454 ) Investment and other income (loss), net 11,683 11,602 10,310 5,731 5,287 (44,102 ) 511 Income (loss) before income taxes 9,354 11,593 10,167 4,628 21,295 (44,102 ) 12,935 Income tax (expense) benefit 541 (9 ) 30 (17 ) (3,357 ) — (2,812 ) Net income (loss) 9,895 11,584 10,197 4,611 17,938 (44,102 ) 10,123 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 228 — 228 Net income (loss) attributable to Comcast Corporation $ 9,895 $ 11,584 $ 10,197 $ 4,611 $ 17,710 $ (44,102 ) $ 9,895 Comprehensive income (loss) attributable to Comcast Corporation $ 9,104 $ 11,600 $ 10,201 $ 4,640 $ 16,857 $ (43,298 ) $ 9,104 Condensed Consolidating Statement of Income For the Nine Months Ended September 30, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Revenue: Service revenue $ — $ — $ — $ — $ 66,661 $ — $ 66,661 Management fee revenue 889 — 873 — — (1,762 ) — Total revenue 889 — 873 — 66,661 (1,762 ) 66,661 Costs and Expenses: Programming and production — — — — 20,440 — 20,440 Other operating and administrative 626 — 873 772 18,814 (1,762 ) 19,323 Advertising, marketing and promotion — — — — 4,924 — 4,924 Depreciation 34 — — — 6,036 — 6,070 Amortization 4 — — — 1,746 — 1,750 Other operating gains — — — — (341 ) — (341 ) Total costs and expenses 664 — 873 772 51,619 (1,762 ) 52,166 Operating income (loss) 225 — — (772 ) 15,042 — 14,495 Interest expense (1,739 ) (9 ) (143 ) (332 ) (190 ) — (2,413 ) Investment and other income (loss), net 10,416 10,279 8,832 5,107 3,977 (38,519 ) 92 Income (loss) before income taxes 8,902 10,270 8,689 4,003 18,829 (38,519 ) 12,174 Income tax (expense) benefit 318 — 29 (12 ) (3,229 ) — (2,894 ) Net income (loss) 9,220 10,270 8,718 3,991 15,600 (38,519 ) 9,280 Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock — — — — 60 — 60 Net income (loss) attributable to Comcast Corporation $ 9,220 $ 10,270 $ 8,718 $ 3,991 $ 15,540 $ (38,519 ) $ 9,220 Comprehensive income (loss) attributable to Comcast Corporation $ 9,139 $ 10,245 $ 8,723 $ 3,877 $ 15,357 $ (38,202 ) $ 9,139
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows For the Nine Months Ended September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Net cash provided by (used in) operating activities $ (1,522 ) $ 293 $ (217 ) $ (910 ) $ 21,818 $ — $ 19,462 Investing Activities: Net transactions with affiliates 10,333 (293 ) 217 2,883 (13,140 ) — — Capital expenditures (20 ) — — — (6,846 ) — (6,866 ) Cash paid for intangible assets (2 ) — — — (1,684 ) — (1,686 ) Acquisitions and construction of real estate properties (35 ) — — — (5 ) — (40 ) Construction of Universal Beijing Resort — — — — (736 ) — (736 ) Acquisitions, net of cash acquired — — — — (181 ) — (181 ) Proceeds from sales of businesses and investments — — — — 208 — 208 Purchases of investments (25 ) — — (67 ) (1,605 ) — (1,697 ) Other — — — — 86 — 86 Net cash provided by (used in) investing activities 10,251 (293 ) 217 2,816 (23,903 ) — (10,912 ) Financing Activities: Proceeds from (repayments of) short-term borrowings, net — — — — (1,288 ) — (1,288 ) Proceeds from borrowings — — — — 516 — 516 Proceeds from collateralized obligation — — — — 5,175 — 5,175 Repurchases and repayments of debt (5,513 ) — — (2,008 ) (2,454 ) — (9,975 ) Repurchases of common stock under repurchase program and employee plans (432 ) — — — — — (432 ) Dividends paid (2,778 ) — — — — — (2,778 ) Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock — — — — (235 ) — (235 ) Other (5 ) — — (40 ) 236 — 191 Net cash provided by (used in) financing activities (8,728 ) — — (2,048 ) 1,950 — (8,826 ) Impact of foreign currency on cash, cash equivalents and restricted cash (1 ) — — — (30 ) — (31 ) Increase (decrease) in cash, cash equivalents and restricted cash — — — (142 ) (165 ) — (307 ) Cash, cash equivalents and restricted cash, beginning of period — — — 416 3,493 — 3,909 Cash, cash equivalents and restricted cash, end of period $ — $ — $ — $ 274 $ 3,328 $ — $ 3,602 Condensed Consolidating Statement of Cash Flows For the Nine Months Ended September 30, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Net cash provided by (used in) operating activities $ (1,461 ) $ 137 $ (206 ) $ (1,047 ) $ 21,084 $ — $ 18,507 Investing Activities: Net transactions with affiliates (1,087 ) (586 ) 206 800 667 — — Capital expenditures (15 ) — — — (6,592 ) — (6,607 ) Cash paid for intangible assets (3 ) — — — (1,372 ) — (1,375 ) Acquisitions and construction of real estate properties (94 ) — — — (35 ) — (129 ) Construction of Universal Beijing Resort — — — — (257 ) — (257 ) Acquisitions, net of cash acquired — — — — (88 ) — (88 ) Proceeds from sales of investments — — — 67 60 — 127 Purchases of investments (118 ) — — (50 ) (672 ) — (840 ) Other — 449 — — 130 — 579 Net cash provided by (used in) investing activities (1,317 ) (137 ) 206 817 (8,159 ) — (8,590 ) Financing Activities: Proceeds from (repayments of) short-term borrowings, net 2,117 — — — 792 — 2,909 Proceeds from borrowings 9,386 — — — 464 — 9,850 Repurchases and repayments of debt (1,900 ) — — (3 ) (2,502 ) — (4,405 ) Repurchases of common stock under repurchase program and employee plans (4,282 ) — — — — — (4,282 ) Dividends paid (2,487 ) — — — — — (2,487 ) Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock — — — — (209 ) — (209 ) Other (56 ) — — — (186 ) — (242 ) Net cash provided by (used in) financing activities 2,778 — — (3 ) (1,641 ) — 1,134 Increase (decrease) in cash, cash equivalents and restricted cash — — — (233 ) 11,284 — 11,051 Cash, cash equivalents and restricted cash, beginning of period — — — 496 3,075 — 3,571 Cash, cash equivalents and restricted cash, end of period $ — $ — $ — $ 263 $ 14,359 $ — $ 14,622
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet September 30, 2019 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Assets Cash and cash equivalents $ — $ — $ — $ 274 $ 3,233 $ — $ 3,507 Receivables, net — — — — 10,684 — 10,684 Programming rights — — — — 3,457 — 3,457 Other current assets 128 22 — 23 4,502 — 4,675 Total current assets 128 22 — 297 21,876 — 22,323 Film and television costs — — — — 8,647 — 8,647 Investments 275 12 159 1,039 5,988 — 7,473 Investment securing collateralized obligation — — — — 816 — 816 Investments in and amounts due from subsidiaries eliminated upon consolidation 158,369 149,186 132,753 54,857 98,744 (593,909 ) — Property and equipment, net 664 — — — 46,126 — 46,790 Franchise rights — — — — 59,365 — 59,365 Goodwill — — — — 66,913 — 66,913 Other intangible assets, net 8 — — — 35,156 — 35,164 Other noncurrent assets, net 1,025 166 — 95 8,014 (417 ) 8,883 Total assets $ 160,469 $ 149,386 $ 132,912 $ 56,288 $ 351,645 $ (594,326 ) $ 256,374 Liabilities and Equity Accounts payable and accrued expenses related to trade creditors $ — $ — $ — $ — $ 10,198 $ — $ 10,198 Accrued participations and residuals — — — — 1,615 — 1,615 Deferred revenue — — — — 2,944 — 2,944 Accrued expenses and other current liabilities 2,421 244 256 415 6,857 — 10,193 Current portion of long-term debt — — — 7 1,032 — 1,039 Total current liabilities 2,421 244 256 422 22,646 — 25,989 Long-term debt, less current portion 76,654 152 2,100 5,751 15,190 — 99,847 Collateralized obligation — — — — 5,165 — 5,165 Deferred income taxes — 344 — 68 28,142 (562 ) 27,992 Other noncurrent liabilities 3,250 — — 1,555 11,903 145 16,853 Redeemable noncontrolling interests and redeemable subsidiary preferred stock — — — — 1,368 — 1,368 Equity: Common stock 54 — — — — — 54 Other shareholders’ equity 78,090 148,646 130,556 48,492 266,215 (593,909 ) 78,090 Total Comcast Corporation shareholders’ equity 78,144 148,646 130,556 48,492 266,215 (593,909 ) 78,144 Noncontrolling interests — — — — 1,016 — 1,016 Total equity 78,144 148,646 130,556 48,492 267,231 (593,909 ) 79,160 Total liabilities and equity $ 160,469 $ 149,386 $ 132,912 $ 56,288 $ 351,645 $ (594,326 ) $ 256,374 Condensed Consolidating Balance Sheet December 31, 2018 (in millions) Comcast Comcast CCCL NBCUniversal Non- Elimination Consolidated Assets Cash and cash equivalents $ — $ — $ — $ 416 $ 3,398 $ — $ 3,814 Receivables, net — — — — 11,104 — 11,104 Programming rights — — — — 3,746 — 3,746 Other current assets 66 20 — 28 3,070 — 3,184 Total current assets 66 20 — 444 21,318 — 21,848 Film and television costs — — — — 7,837 — 7,837 Investments 270 11 143 790 6,669 — 7,883 Investments in and amounts due from subsidiaries eliminated upon consolidation 157,264 147,028 130,214 53,853 97,872 (586,231 ) — Property and equipment, net 670 — — — 43,767 — 44,437 Franchise rights — — — — 59,365 — 59,365 Goodwill — — — — 66,154 — 66,154 Other intangible assets, net 11 — — — 38,347 — 38,358 Other noncurrent assets, net 1,057 208 — 85 4,910 (458 ) 5,802 Total assets $ 159,338 $ 147,267 $ 130,357 $ 55,172 $ 346,239 $ (586,689 ) $ 251,684 Liabilities and Equity Accounts payable and accrued expenses related to trade creditors $ 2 $ — $ — $ — $ 8,492 $ — $ 8,494 Accrued participations and residuals — — — — 1,808 — 1,808 Deferred revenue — — — — 2,182 — 2,182 Accrued expenses and other current liabilities 2,357 150 360 282 7,572 — 10,721 Current portion of long-term debt 699 — — 4 3,695 — 4,398 Total current liabilities 3,058 150 360 286 23,749 — 27,603 Long-term debt, less current portion 81,661 146 2,100 7,748 15,690 — 107,345 Deferred income taxes — 314 — 65 27,734 (524 ) 27,589 Other noncurrent liabilities 3,006 — — 1,201 11,056 66 15,329 Redeemable noncontrolling interests and redeemable subsidiary preferred stock — — — — 1,316 — 1,316 Equity: Common stock 54 — — — — — 54 Other shareholders’ equity 71,559 146,657 127,897 45,872 265,805 (586,231 ) 71,559 Total Comcast Corporation shareholders’ equity 71,613 146,657 127,897 45,872 265,805 (586,231 ) 71,613 Noncontrolling interests — — — — 889 — 889 Total equity 71,613 146,657 127,897 45,872 266,694 (586,231 ) 72,502 Total liabilities and equity $ 159,338 $ 147,267 $ 130,357 $ 55,172 $ 346,239 $ (586,689 ) $ 251,684

Condensed Consolidated Financ_2

Condensed Consolidated Financial Statements (Details) - Sky Limited [Member] $ in Millions, £ in Billions	Oct. 09, 2018USD ($)	Oct. 09, 2018GBP (£)
Business Acquisition [Line Items]
Interest in business acquired in acquisition	100.00%	100.00%
Cash consideration transferred by Comcast	$ 39,387	£ 30.2

Segment Information (Details)

Segment Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)segment	Sep. 30, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			6
Financial Data by Business Segment
Revenue	$ 26,827	$ 22,135	$ 80,544	$ 66,661
Adjusted EBITDA	8,553	7,313	25,822	21,974
Depreciation and Amortization	3,180	2,618	9,776	7,820
Capital Expenditures	2,511	2,384	6,866	6,607
Cash Paid for Intangible Assets	608	445	$ 1,686	1,375
NBCUniversal Media LLC [Member]
Segment Reporting Information [Line Items]
Number of reportable segments | segment			4
Financial Data by Business Segment
Revenue	8,294	8,625	$ 24,866	26,468
Adjusted EBITDA	2,089	2,066	6,747	6,511
Depreciation and Amortization	537	514	1,579	1,577
Capital Expenditures	505	405	1,431	1,135
Cash Paid for Intangible Assets	63	78	199	374
Cable Communications [Member]
Financial Data by Business Segment
Revenue	14,584	14,023	43,314	41,638
Cable Networks [Member]
Financial Data by Business Segment
Revenue	2,771	2,850	8,586	8,881
Cable Networks [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	2,771	2,850	8,586	8,881
Broadcast Television [Member]
Financial Data by Business Segment
Revenue	2,230	2,452	7,099	8,340
Broadcast Television [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	2,230	2,452	7,099	8,340
Filmed Entertainment [Member]
Financial Data by Business Segment
Revenue	1,706	1,819	4,931	5,176
Filmed Entertainment [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	1,706	1,819	4,931	5,176
Theme Parks [Member]
Financial Data by Business Segment
Revenue	1,631	1,528	4,371	4,170
Theme Parks [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	1,631	1,528	4,371	4,170
NBCUniversal Segments [Member]
Financial Data by Business Segment
Revenue	8,295	8,596	24,814	26,366
Adjusted EBITDA	2,091	2,057	6,752	6,478
Depreciation and Amortization	537	514	1,579	1,577
Capital Expenditures	505	405	1,431	1,135
Cash Paid for Intangible Assets	63	78	199	374
Sky Limited [Member]
Financial Data by Business Segment
Revenue	4,554	0	14,179	0
Operating Segments [Member] | Cable Communications [Member]
Financial Data by Business Segment
Revenue	14,584	14,023	43,314	41,638
Adjusted EBITDA	5,801	5,434	17,383	16,100
Depreciation and Amortization	1,967	2,077	6,038	6,161
Capital Expenditures	1,814	1,945	4,771	5,403
Cash Paid for Intangible Assets	336	367	962	998
Operating Segments [Member] | Cable Networks [Member]
Financial Data by Business Segment
Revenue	2,771	2,850	8,586	8,881
Adjusted EBITDA	955	959	3,418	3,389
Depreciation and Amortization	184	180	549	548
Capital Expenditures	9	11	21	22
Cash Paid for Intangible Assets	4	6	10	15
Operating Segments [Member] | Cable Networks [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	2,771	2,850	8,586	8,881
Adjusted EBITDA	955	959	3,418	3,389
Depreciation and Amortization	184	180	549	548
Capital Expenditures	9	11	21	22
Cash Paid for Intangible Assets	4	6	10	15
Operating Segments [Member] | Broadcast Television [Member]
Financial Data by Business Segment
Revenue	2,230	2,452	7,099	8,340
Adjusted EBITDA	338	321	1,259	1,245
Depreciation and Amortization	36	32	115	106
Capital Expenditures	36	37	86	99
Cash Paid for Intangible Assets	3	0	9	75
Operating Segments [Member] | Broadcast Television [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	2,230	2,452	7,099	8,340
Adjusted EBITDA	338	321	1,259	1,245
Depreciation and Amortization	36	32	115	106
Capital Expenditures	36	37	86	99
Cash Paid for Intangible Assets	3	0	9	75
Operating Segments [Member] | Filmed Entertainment [Member]
Financial Data by Business Segment
Revenue	1,706	1,819	4,931	5,176
Adjusted EBITDA	195	214	742	555
Depreciation and Amortization	21	26	60	117
Capital Expenditures	5	9	13	24
Cash Paid for Intangible Assets	5	6	16	20
Operating Segments [Member] | Filmed Entertainment [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	1,706	1,819	4,931	5,176
Adjusted EBITDA	195	214	742	555
Depreciation and Amortization	21	26	60	117
Capital Expenditures	5	9	13	24
Cash Paid for Intangible Assets	5	6	16	20
Operating Segments [Member] | Theme Parks [Member]
Financial Data by Business Segment
Revenue	1,631	1,528	4,371	4,170
Adjusted EBITDA	731	725	1,819	1,789
Depreciation and Amortization	182	170	514	492
Capital Expenditures	400	269	1,172	811
Cash Paid for Intangible Assets	8	23	44	158
Operating Segments [Member] | Theme Parks [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	1,631	1,528	4,371	4,170
Adjusted EBITDA	731	725	1,819	1,789
Depreciation and Amortization	182	170	514	492
Capital Expenditures	400	269	1,172	811
Cash Paid for Intangible Assets	8	23	44	158
Operating Segments [Member] | Sky Limited [Member]
Financial Data by Business Segment
Revenue	4,554		14,179
Adjusted EBITDA	899		2,334
Depreciation and Amortization	644		2,058
Capital Expenditures	104		540
Cash Paid for Intangible Assets	188		491
Corporate, Non-Segment [Member]
Financial Data by Business Segment
Revenue	42	73	206	412
Adjusted EBITDA	(237)	(188)	(637)	(566)
Depreciation and Amortization	32	27	101	82
Capital Expenditures	88	34	124	69
Cash Paid for Intangible Assets	21	0	34	3
Corporate, Non-Segment [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	21	49	117	157
Adjusted EBITDA	(133)	(152)	(492)	(464)
Depreciation and Amortization	114	106	341	314
Capital Expenditures	55	79	139	179
Cash Paid for Intangible Assets	43	43	120	106
Corporate, Non-Segment [Member] | NBCUniversal Segments [Member]
Financial Data by Business Segment
Revenue	21	15	60	44
Adjusted EBITDA	(130)	(161)	(486)	(497)
Depreciation and Amortization	114	106	341	314
Capital Expenditures	55	79	139	179
Cash Paid for Intangible Assets	43	43	120	106
Eliminations [Member]
Financial Data by Business Segment
Revenue	(648)	(557)	(1,969)	(1,755)
Adjusted EBITDA	(1)	10	(10)	(38)
Depreciation and Amortization	0	0	0	0
Capital Expenditures	0	0	0	0
Cash Paid for Intangible Assets	0	0	0	0
Eliminations [Member] | NBCUniversal Media LLC [Member]
Financial Data by Business Segment
Revenue	(65)	(73)	(238)	(256)
Adjusted EBITDA	3	(1)	1	(3)
Depreciation and Amortization	0	0	0	0
Capital Expenditures	0	0	0	0
Cash Paid for Intangible Assets	0	0	0	0
Eliminations [Member] | NBCUniversal Segments [Member]
Financial Data by Business Segment
Revenue	(64)	(68)	(233)	(245)
Adjusted EBITDA	2	(1)	0	(3)
Depreciation and Amortization	0	0	0	0
Capital Expenditures	0	0	0	0
Cash Paid for Intangible Assets	$ 0	$ 0	$ 0	$ 0

Segment Information (Reconcilia

Segment Information (Reconciliation of Adjusted EBITDA from Segment to Consolidated Statements) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	$ 8,553	$ 7,313	$ 25,822	$ 21,974
Adjustment for Sky transaction-related costs	(33)	0	(168)	0
Depreciation	(2,124)	(2,038)	(6,561)	(6,070)
Amortization	(1,056)	(580)	(3,215)	(1,750)
Other operating gains	0	141	0	341
Interest expense	(1,167)	(830)	(3,454)	(2,413)
Investment and other income (loss), net	(110)	(111)	511	92
Income (loss) before income taxes	4,063	3,895	12,935	12,174
NBCUniversal Media LLC [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	2,089	2,066	6,747	6,511
Depreciation	(259)	(250)	(755)	(750)
Amortization	(278)	(264)	(824)	(827)
Other operating gains	0	141	0	141
Interest expense	(348)	(134)	(601)	(394)
Investment and other income (loss), net	169	(205)	449	(377)
Income (loss) before income taxes	$ 1,373	$ 1,354	$ 5,016	$ 4,304

Revenue (Details)

Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 26,827	$ 22,135	$ 80,544	$ 66,661
Cable Communications [Member]
Disaggregation of Revenue [Line Items]
Revenue	14,584	14,023	43,314	41,638
Cable Communications [Member] | Residential, High-Speed Internet [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,721	4,321	13,961	12,740
Cable Communications [Member] | Residential, Video [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,541	5,591	16,763	16,878
Cable Communications [Member] | Residential, Voice [Member]
Disaggregation of Revenue [Line Items]
Revenue	963	982	2,935	2,982
Cable Communications [Member] | Residential, Wireless [Member]
Disaggregation of Revenue [Line Items]
Revenue	326	236	795	623
Cable Communications [Member] | Business Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,971	1,803	5,795	5,290
Cable Communications [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	603	684	1,766	1,932
Cable Communications [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 459	$ 406	$ 1,299	$ 1,193
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%	2.70%
Cable Networks [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 2,771	$ 2,850	$ 8,586	$ 8,881
Cable Networks [Member] | Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,681	1,655	5,123	5,166
Cable Networks [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	809	812	2,592	2,718
Cable Networks [Member] | Content Licensing And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	281	383	871	997
Broadcast Television [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,230	2,452	7,099	8,340
Broadcast Television [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,191	1,355	3,837	5,107
Broadcast Television [Member] | Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenue	447	538	1,479	1,541
Broadcast Television [Member] | Distribution And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	592	559	1,783	1,692
Filmed Entertainment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,706	1,819	4,931	5,176
Filmed Entertainment [Member] | Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenue	737	719	2,266	2,100
Filmed Entertainment [Member] | Theatrical [Member]
Disaggregation of Revenue [Line Items]
Revenue	549	601	1,246	1,564
Filmed Entertainment [Member] | Home Entertainment [Member]
Disaggregation of Revenue [Line Items]
Revenue	185	260	681	733
Filmed Entertainment [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	235	239	738	779
Theme Parks [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,631	1,528	4,371	4,170
NBCUniversal Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,295	8,596	24,814	26,366
Sky Limited [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,554	0	14,179	0
Sky Limited [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	446	0	1,602	0
Sky Limited [Member] | Direct To Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,793	0	11,516	0
Sky Limited [Member] | Content [Member]
Disaggregation of Revenue [Line Items]
Revenue	315	0	1,061	0
Corporate, Non-Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	42	73	206	412
Corporate, Non-Segment [Member] | NBCUniversal Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue	21	15	60	44
Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	(648)	(557)	(1,969)	(1,755)
Eliminations [Member] | NBCUniversal Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue	(64)	(68)	(233)	(245)
NBCUniversal Media LLC [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,294	8,625	24,866	26,468
NBCUniversal Media LLC [Member] | Cable Networks [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,771	2,850	8,586	8,881
NBCUniversal Media LLC [Member] | Cable Networks [Member] | Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,681	1,655	5,123	5,166
NBCUniversal Media LLC [Member] | Cable Networks [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	809	812	2,592	2,718
NBCUniversal Media LLC [Member] | Cable Networks [Member] | Content Licensing And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	281	383	871	997
NBCUniversal Media LLC [Member] | Broadcast Television [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,230	2,452	7,099	8,340
NBCUniversal Media LLC [Member] | Broadcast Television [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,191	1,355	3,837	5,107
NBCUniversal Media LLC [Member] | Broadcast Television [Member] | Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenue	447	538	1,479	1,541
NBCUniversal Media LLC [Member] | Broadcast Television [Member] | Distribution And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	592	559	1,783	1,692
NBCUniversal Media LLC [Member] | Filmed Entertainment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,706	1,819	4,931	5,176
NBCUniversal Media LLC [Member] | Filmed Entertainment [Member] | Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenue	737	719	2,266	2,100
NBCUniversal Media LLC [Member] | Filmed Entertainment [Member] | Theatrical [Member]
Disaggregation of Revenue [Line Items]
Revenue	549	601	1,246	1,564
NBCUniversal Media LLC [Member] | Filmed Entertainment [Member] | Home Entertainment [Member]
Disaggregation of Revenue [Line Items]
Revenue	185	260	681	733
NBCUniversal Media LLC [Member] | Filmed Entertainment [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	235	239	738	779
NBCUniversal Media LLC [Member] | Theme Parks [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,631	1,528	4,371	4,170
NBCUniversal Media LLC [Member] | Corporate, Non-Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	21	49	117	157
NBCUniversal Media LLC [Member] | Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ (65)	$ (73)	$ (238)	$ (256)

Revenue (Revenue by Geographic

Revenue (Revenue by Geographic Location) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 26,827	$ 22,135	$ 80,544	$ 66,661
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	20,398	20,244	61,394	61,060
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,211	825	15,878	2,345
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,218	1,066	3,272	3,256
NBCUniversal Media LLC [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,294	8,625	24,866	26,468
NBCUniversal Media LLC [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,382	6,758	19,674	20,945
NBCUniversal Media LLC [Member] | Foreign [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,912	$ 1,867	$ 5,192	$ 5,523

Revenue (Condensed Consolidated

Revenue (Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Condensed Consolidated Balance Sheet [Line Items]
Receivables, gross	$ 11,159	$ 11,456
Less: Allowance for doubtful accounts	475	352
Receivables, net	10,684	11,104
Noncurrent receivables, net (included in other noncurrent assets, net)	1,261	1,399
Contract acquisition and fulfillment costs (included in other noncurrent assets, net)	1,055	991
Noncurrent deferred revenue (included in other noncurrent liabilities)	663	650
NBCUniversal Media LLC [Member]
Condensed Consolidated Balance Sheet [Line Items]
Receivables, gross	7,139	7,392
Less: Allowance for doubtful accounts	99	99
Receivables, net	7,040	7,293
Noncurrent receivables, net (included in other noncurrent assets, net)	1,097	1,180
Noncurrent deferred revenue (included in other noncurrent liabilities)	$ 422	$ 481

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net Income Attributable to Comcast Corporation	$ 3,217	$ 2,886	$ 9,895	$ 9,220
Basic EPS attributable to Comcast Corporation shareholders (in shares)	4,551	4,564	4,544	4,599
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.71	$ 0.63	$ 2.18	$ 2
Effect of dilutive securities:
Net Income Attributable to Comcast Corporation	$ 3,217	$ 2,886	$ 9,895	$ 9,220
Assumed exercise or issuance of shares relating to stock plans (in shares)	68	55	62	56
Diluted EPS attributable to Comcast Corporation shareholders (in shares)	4,619	4,619	4,606	4,655
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.70	$ 0.62	$ 2.15	$ 1.98

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Debt Instrument [Line Items]
Total carrying value of debt	$ 100,900	$ 100,900
Total fair value of debt	114,100	114,100
Borrowings		516	$ 9,850
Repayments of debt		9,975	4,405
NBCUniversal Media LLC [Member]
Debt Instrument [Line Items]
Total carrying value of debt	10,800	10,800
Total fair value of debt	11,800	11,800
Borrowings		572	485
Repayments of debt		2,739	$ 387
Senior Notes And Notes Payable, Other Payables [Member] | Senior Notes Due 2020 and Notes Due 2049 [Member] | NBCUniversal Media LLC [Member]
Debt Instrument [Line Items]
Charge to interest expense upon early redemption of debt	213	213
Senior Notes [Member] | Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Repayments of debt		3,400
Senior Notes [Member] | Senior Notes Due 2020 [Member] | NBCUniversal Media LLC [Member]
Debt Instrument [Line Items]
Repayments of debt		2,000
Comcast and Consolidated Subsidiaries [Member] | Notes Payable [Member] | Notes Due 2049 [Member] | NBCUniversal Media LLC [Member]
Debt Instrument [Line Items]
Repayments of debt		610
Charge to interest expense upon early redemption of debt	$ 178	$ 178

Long-Term Debt (Guarantee Struc

Long-Term Debt (Guarantee Structure) (Details) $ in Millions, ¥ in Billions, ¥ in Billions	Sep. 30, 2019USD ($)	Sep. 30, 2019JPY (¥)	Sep. 30, 2019CNY (¥)
Guarantor Subsidiaries [Member]
Debt Instrument [Line Items]
Principal amount of debt securities subject to guarantee	$ 86,400
NBCUniversal Enterprise Debt Securities [Member]
Debt Instrument [Line Items]
Principal amount of debt securities subject to guarantee	1,500
Universal Studios Japan Term Loans Maturing March 2022 [Member]
Debt Instrument [Line Items]
Principal amount of debt securities subject to guarantee	3,500	¥ 379
Universal Beijing Resort Term Loans [Member]
Debt Instrument [Line Items]
Principal amount of debt securities not subject to guarantee	1,000		¥ 7.4
Sky Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount of debt securities subject to guarantee	$ 9,000
NBCUniversal Media LLC [Member]
Debt Instrument [Line Items]
Ownership in cable holding company subsidiaries	100.00%	100.00%	100.00%
NBCUniversal Media LLC [Member] | NBCUniversal Enterprise [Member]
Debt Instrument [Line Items]
Related party aggregate principal amount debt securities not subject to guarantee	$ 1,500
Related party liquidation preference preferred stock not subject to guarantee	725
NBCUniversal Media LLC [Member] | Comcast and Comcast Cable Debt Securities [Member]
Debt Instrument [Line Items]
Principal amount of debt securities subject to guarantee	80,600
NBCUniversal Media LLC [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Guarantee obligations, maximum capacity of credit facility	$ 7,600

Significant Transactions (Sky T

Significant Transactions (Sky Transaction) (Details) - Sky Limited [Member] £ / shares in Units, $ in Millions, £ in Billions	Oct. 09, 2018USD ($)	Oct. 09, 2018GBP (£)	Mar. 31, 2019USD ($)	Oct. 09, 2018£ / shares
Business Acquisition [Line Items]
Shares acquired, share price (in gbp per share) | £ / shares				£ 17.28
Percentage of voting interests acquired in period	100.00%	100.00%
Cash consideration	$ 39,387	£ 30.2
Deferred tax assets related to net operating losses			$ 1,200
Goodwill purchase accounting adjustment			1,400
Incremental depreciation and amortization			$ 53
Property and equipment	4,127
Trade Names [Member]
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired	5,800
Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 9,500
Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Estimated weighted average useful life	6 years	6 years
Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated weighted average useful life	19 years	19 years
Developed Technology and Software [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 4,300
Developed Technology and Software [Member] | Minimum [Member]
Business Acquisition [Line Items]
Estimated weighted average useful life	4 years	4 years
Developed Technology and Software [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated weighted average useful life	9 years	9 years
Customer Premise Equipment [Member]
Business Acquisition [Line Items]
Property and equipment	$ 1,400
Customer Premise Equipment [Member] | Minimum [Member]
Business Acquisition [Line Items]
Estimated useful lives	5 years	5 years
Customer Premise Equipment [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated useful lives	7 years	7 years

Significant Transactions (Alloc

Significant Transactions (Allocation of Purchase Price) (Details) $ in Millions, £ in Billions	Oct. 09, 2018USD ($)	Oct. 09, 2018GBP (£)	Sep. 30, 2019USD ($)
Business Acquisition [Line Items]
Goodwill			$ 154
Sky Limited [Member]
Business Acquisition [Line Items]
Consideration transferred	$ 39,387	£ 30.2
Cash	1,283
Accounts receivable and other current assets	2,359
Film and television costs	2,512
Property and equipment	4,127
Intangible assets	19,539
Accounts payable, accrued liabilities and other current liabilities	(5,885)
Long-term debt	(11,468)
Deferred tax assets (liabilities), net	(2,974)
Other noncurrent assets and (liabilities), net	(1,398)
Fair value of identifiable net assets acquired	8,095
Goodwill	$ 31,292

Significant Transactions (Acqui

Significant Transactions (Acquisition-Related Expenses) (Details) - Sky Limited [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Business Acquisition [Line Items]
Other operating and administrative expenses	$ 8	$ 29
Interest expense	$ 34	$ 45

Significant Transactions (Unaud

Significant Transactions (Unaudited Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Business Combinations [Abstract]
Revenue	$ 26,824	$ 81,239
Net income attributable to Comcast Corporation	$ 3,448	$ 9,388
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.75	$ 2.04
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.74	$ 2.01

Significant Transactions (Unive

Significant Transactions (Universal Beijing Resort) (Details) - Universal Beijing Resort [Member] - Variable Interest Entity, Primary Beneficiary [Member] ¥ in Billions, $ in Billions	Sep. 30, 2019USD ($)	Sep. 30, 2019CNY (¥)
Variable Interest Entity [Line Items]
Ownership percentage in variable interest entity	30.00%	30.00%
Maximum borrowing capacity of variable interest entity	$ 4	¥ 26.6
Consolidated variable interest entity's assets included in condensed consolidated balance sheet	2.4
Consolidated variable interest entity's liabilities included in condensed consolidated balance sheet	$ 1.7
NBCUniversal Media LLC [Member]
Variable Interest Entity [Line Items]
Ownership percentage in variable interest entity	30.00%	30.00%
Maximum borrowing capacity of variable interest entity	$ 4	¥ 26.6
Consolidated variable interest entity's assets included in condensed consolidated balance sheet	2.4
Consolidated variable interest entity's liabilities included in condensed consolidated balance sheet	1.7
Universal Beijing Resort Term Loans [Member]
Variable Interest Entity [Line Items]
Proceeds from borrowings	1
Universal Beijing Resort Term Loans [Member] | NBCUniversal Media LLC [Member]
Variable Interest Entity [Line Items]
Proceeds from borrowings	$ 1

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 4,559
NBCUniversal Media LLC [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 1,697
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets		$ 4,200
Operating lease liabilities		4,800
Finance lease liabilities		787
Accounting Standards Update 2016-02 [Member] | Sky Limited [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional finance lease liability		229
Accounting Standards Update 2016-02 [Member] | NBCUniversal Media LLC [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets		1,700
Operating lease liabilities		1,800
Finance lease liabilities		$ 332

Film and Television Costs (Film

Film and Television Costs (Film and Television Costs) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Film Costs:
Released, less amortization	$ 1,615	$ 1,600
Completed, not released	124	144
In production and in development	1,282	1,063
Total film costs	3,021	2,807
Television Costs:
Released, less amortization	2,514	2,289
In production and in development	1,228	953
Total television costs	3,742	3,242
Programming rights, less amortization	5,341	5,534
Total film costs, television costs and programming rights	12,104	11,583
Less: Current portion of programming rights	3,457	3,746
Film and television costs	8,647	7,837
NBCUniversal Media LLC [Member]
Film Costs:
Released, less amortization	1,615	1,600
Completed, not released	124	144
In production and in development	1,282	1,063
Total film costs	3,021	2,807
Television Costs:
Released, less amortization	2,410	2,161
In production and in development	1,228	953
Total television costs	3,638	3,114
Programming rights, less amortization	2,578	2,694
Total film costs, television costs and programming rights	9,237	8,615
Less: Current portion of programming rights	1,461	1,323
Film and television costs	$ 7,776	$ 7,292

Investments (Investment and Oth

Investments (Investment and Other Income (Loss), Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Investment and Other Income (Loss), Net [Line Items]
Equity in net income (losses) of investees, net	$ (355)	$ (76)	$ (295)	$ (56)
Realized and unrealized gains (losses) on equity securities, net	174	(38)	582	(50)
Other income (loss), net	71	3	224	198
Investment and other income (loss), net	(110)	(111)	511	92
NBCUniversal Media LLC [Member]
Investment and Other Income (Loss), Net [Line Items]
Equity in net income (losses) of investees, net	(88)	(119)	(299)	(306)
Realized and unrealized gains (losses) on equity securities, net	178	(91)	436	(128)
Other income (loss), net	79	5	312	57
Investment and other income (loss), net	$ 169	$ (205)	$ 449	$ (377)

Investments (Schedule of Invest

Investments (Schedule of Investments) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Equity method	$ 5,363	$ 4,035
Marketable equity securities	862	341
Nonmarketable equity securities	1,933	1,805
Other investments	1,841	1,796
Total investments	9,999	7,977
Less: Current investments	1,710	94
Less: Investment securing collateralized obligation	816	0
Noncurrent investments	7,473	7,883
NBCUniversal Media LLC [Member]
Schedule of Investments [Line Items]
Equity method	1,290	707
Marketable equity securities	725	162
Nonmarketable equity securities	794	811
Total investments	2,809	1,680
Less: Investment securing collateralized obligation	816	0
Noncurrent investments	$ 1,993	$ 1,680

Investments (Equity Method Inve

Investments (Equity Method Investments) (Details) - USD ($)	1 Months Ended				3 Months Ended			9 Months Ended
	Aug. 31, 2019	May 31, 2019	Apr. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Apr. 30, 2019	Dec. 31, 2018	Aug. 31, 2016	Jul. 31, 2016
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net					$ (355,000,000)		$ (76,000,000)	$ (295,000,000)	$ (56,000,000)
Equity method investments					5,363,000,000			5,363,000,000			$ 4,035,000,000
Investment securing collateralized obligation					816,000,000			816,000,000			0
Proceeds from collateralized obligation	$ 5,200,000,000							5,175,000,000	0
Collateralized obligation					5,165,000,000			5,165,000,000			0
Atairos [Member]
Schedule of Equity Method Investments [Line Items]
Pretax gain, sale of business to Atairos			$ 200,000,000
Atairos [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net					(262,000,000)		38,000,000	6,000,000	224,000,000
Cash capital contributions for equity method investments								475,000,000	133,000,000
Equity method investments					3,200,000,000			3,200,000,000			2,700,000,000
Hulu [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net					(101,000,000)		(132,000,000)	(351,000,000)	(370,000,000)
Equity method investments											248,000,000
Ownership percentage		33.00%								30.00%		30.00%	33.00%
Cash capital contributions for equity method investments		$ 477,000,000						903,000,000	341,000,000
Maximum total capital call in annual period		$ 1,500,000,000
Ownership percentage floor		21.00%
Fair market value assessment floor for put and call option		$ 27,500,000,000
Ownership percentage representing fair market value floor for put and call option		100.00%
Minimum guaranteed proceeds floor for put and call option		$ 5,800,000,000
Recognition of previously deferred gain						$ 159,000,000
Hulu [Member] | AT&T Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		10.00%
Hulu [Member] | Time Warner, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage												10.00%
The Weather Channel [Member]
Schedule of Equity Method Investments [Line Items]
Pretax gain on sale of investment				$ 64,000,000
NBCUniversal Media LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net					(88,000,000)		(119,000,000)	(299,000,000)	(306,000,000)
Equity method investments					1,290,000,000			1,290,000,000			707,000,000
Investment securing collateralized obligation					816,000,000			816,000,000			0
Proceeds from collateralized obligation	$ 5,200,000,000							5,175,000,000	0
Collateralized obligation					5,165,000,000			5,165,000,000			0
NBCUniversal Media LLC [Member] | Hulu [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (losses) of investees, net					(101,000,000)		$ (132,000,000)	(351,000,000)	(370,000,000)
Equity method investments											$ 248,000,000
Ownership percentage		33.00%								30.00%		30.00%	33.00%
Cash capital contributions for equity method investments		$ 477,000,000						903,000,000	$ 341,000,000
Maximum total capital call in annual period		$ 1,500,000,000
Ownership percentage floor		21.00%
Fair market value assessment floor for put and call option		$ 27,500,000,000
Ownership percentage representing fair market value floor for put and call option		100.00%
Minimum guaranteed proceeds floor for put and call option		$ 5,800,000,000
Recognition of previously deferred gain						$ 159,000,000
NBCUniversal Media LLC [Member] | Hulu [Member] | AT&T Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage		10.00%
NBCUniversal Media LLC [Member] | Hulu [Member] | Time Warner, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage												10.00%
NBCUniversal Media LLC [Member] | The Weather Channel [Member]
Schedule of Equity Method Investments [Line Items]
Pretax gain on sale of investment				$ 64,000,000
Level 2 [Member]
Schedule of Equity Method Investments [Line Items]
Estimated fair value of collateralized obligation					5,200,000,000			5,200,000,000
Level 2 [Member] | NBCUniversal Media LLC [Member]
Schedule of Equity Method Investments [Line Items]
Estimated fair value of collateralized obligation					$ 5,200,000,000			$ 5,200,000,000

Investments (Marketable Equity

Investments (Marketable Equity Securities) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities	$ 862	$ 862		$ 862		$ 341
Realized and unrealized gains (losses) on equity securities, net		174	$ (38)	582	$ (50)
Nonmarketable equity securities	1,933	1,933		1,933		1,805
NBCUniversal Media LLC [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities	725	725		725		162
Realized and unrealized gains (losses) on equity securities, net		178	(91)	436	(128)
Nonmarketable equity securities	794	794		794		811
Snap [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities, recognized unrealized gains (losses)		45	(135)	303	(180)
Marketable equity securities	465	465		465		162
Snap [Member] | NBCUniversal Media LLC [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities, recognized unrealized gains (losses)		45	$ (135)	303	$ (180)
Marketable equity securities	465	465		465		162
Peloton [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities	260	260		260
Realized and unrealized gains (losses) on equity securities, net	150
Nonmarketable equity securities						110
Peloton [Member] | NBCUniversal Media LLC [Member]
Schedule of Marketable Equity Securities [Line Items]
Marketable equity securities	260	$ 260		$ 260
Realized and unrealized gains (losses) on equity securities, net	$ 150
Nonmarketable equity securities						$ 110

Investments (Other Investments)

Investments (Other Investments) (Details) $ in Billions	Sep. 30, 2019USD ($)preferred_stock_series	Dec. 31, 2018USD ($)
AirTouch [Member]
Schedule of Other Investments [Line Items]
Number of series of preferred stock | preferred_stock_series	2
Held to maturity investment	$ 1.6	$ 1.6
AirTouch [Member] | Level 2 [Member]
Schedule of Other Investments [Line Items]
Fair value of held to maturity investment redeemable preferred shares	1.7
AirTouch [Member] | Level 2 [Member]
Schedule of Other Investments [Line Items]
Fair value of redeemable preferred shares	$ 1.7

Goodwill (Schedule of Change in

Goodwill (Schedule of Change in Goodwill) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Goodwill [Roll Forward]
Balance, beginning of period	$ 66,154
Acquisitions	154
Dispositions	(12)
Adjustments	1,440
Foreign currency translation	(823)
Balance, end of period	66,913
Corporate, Non-Segment [Member]
Goodwill [Roll Forward]
Balance, beginning of period	2
Acquisitions	0
Dispositions	0
Adjustments	2
Foreign currency translation	0
Balance, end of period	4
Cable Communications [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, beginning of period	12,784
Acquisitions	131
Dispositions	0
Adjustments	2,166
Foreign currency translation	(116)
Balance, end of period	14,965
Cable Networks [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, beginning of period	13,407
Acquisitions	0
Dispositions	0
Adjustments	490
Foreign currency translation	(34)
Balance, end of period	13,863
Broadcast Television [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, beginning of period	843
Acquisitions	13
Dispositions	0
Adjustments	199
Foreign currency translation	(11)
Balance, end of period	1,044
Filmed Entertainment [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, beginning of period	3,184
Acquisitions	0
Dispositions	0
Adjustments	138
Foreign currency translation	(11)
Balance, end of period	3,311
Theme Parks [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, beginning of period	6,684
Acquisitions	0
Dispositions	0
Adjustments	0
Foreign currency translation	106
Balance, end of period	6,790
Sky Limited [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Balance, beginning of period	29,250
Acquisitions	10
Dispositions	(12)
Adjustments	(1,555)
Foreign currency translation	(757)
Balance, end of period	$ 26,936

Supplemental Financial Inform_3

Supplemental Financial Information (Leases Narrative) (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expense inclusive of short-term and variable lease expenses	$ 268	$ 806
Weighted average remaining lease term for operating leases	10 years	10 years
Weighted average discount rate used to calculate operating lease liabilities	3.78%	3.78%
Cash payments for operating leases		$ 700
NBCUniversal Media LLC [Member]
Lessee, Lease, Description [Line Items]
Operating lease expense inclusive of short-term and variable lease expenses	$ 110	$ 331
Weighted average remaining lease term for operating leases	15 years	15 years
Weighted average discount rate used to calculate operating lease liabilities	4.10%	4.10%
Cash payments for operating leases		$ 199

Supplemental Financial Inform_4

Supplemental Financial Information (Summary of Operating Lease Assets and Liabilities Recorded in the Consolidated Balance Sheets) (Details) - Accounting Standards Update 2016-02 [Member] - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 4,200
Other Noncurrent Assets, Net [Member]
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 4,011
Accrued Expenses and Other Current Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating lease liabilities, current	696
Other Noncurrent Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating lease liabilities, noncurrent	3,863
NBCUniversal Media LLC [Member]
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 1,700
NBCUniversal Media LLC [Member] | Other Noncurrent Assets, Net [Member]
Lessee, Lease, Description [Line Items]
Operating lease assets	1,589
NBCUniversal Media LLC [Member] | Accrued Expenses and Other Current Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating lease liabilities, current	183
NBCUniversal Media LLC [Member] | Other Noncurrent Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating lease liabilities, noncurrent	$ 1,514

Supplemental Financial Inform_5

Supplemental Financial Information (Summary of Future Minimum Rental Commitments for Operating Leases Under New Accounting Guidance) (Details) $ in Millions	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Remaining three months of 2019	$ 182
2020	880
2021	763
2022	633
2023	530
Thereafter	2,606
Total future minimum lease payments	5,594
Less: imputed interest	1,035
Total liability	4,559
NBCUniversal Media LLC [Member]
Lessee, Lease, Description [Line Items]
Remaining three months of 2019	56
2020	258
2021	223
2022	185
2023	159
Thereafter	1,473
Total future minimum lease payments	2,354
Less: imputed interest	657
Total liability	$ 1,697

Supplemental Financial Inform_6

Supplemental Financial Information (Summary of Future Minimum Rental Commitments and Rent Expense for Operating Leases Under Previous Accounting Guidance) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2018
Commitment And Contingencies [Line Items]
2019			$ 891
2020			824
2021			722
2022			592
2023			513
Thereafter			2,608
Rental expense	$ 178	$ 548
NBCUniversal Media LLC [Member]
Commitment And Contingencies [Line Items]
2019			248
2020			232
2021			199
2022			168
2023			144
Thereafter			$ 1,380
Rental expense	$ 69	$ 212

Supplemental Financial Inform_7

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, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		$ 208	$ 151	$ 636	$ 458
Restricted share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		143	94	437	279
Unrecognized pretax compensation expense on nonvested awards		1,200		1,200
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		57	50	176	155
Unrecognized pretax compensation expense on nonvested awards		529		529
Employee stock purchase plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized share-based compensation expense		$ 8	$ 7	$ 23	$ 24
Management Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted (in shares)	41.9
Weighted-average fair value of stock options granted (in dollars per share)	$ 7.91
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)	12.4
Weighted-average fair value of restricted share units granted (in dollars per share)	$ 39.88

Supplemental Financial Inform_8

Supplemental Financial Information (Cash Payments for Interest and Income Taxes) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Payments for Interest and Income Taxes
Interest	$ 3,167	$ 2,240
Income taxes	2,490	1,533
NBCUniversal Media LLC [Member]
Cash Payments for Interest and Income Taxes
Interest	314	253
Income taxes	$ 292	$ 373

Supplemental Financial Inform_9

Supplemental Financial Information (Noncash Activities) (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)$ / shares
Supplemental Financial Information [Line Items]
Property and equipment and intangible assets accrued but not yet paid	$ 2,000
Dividends payable	$ 955
Dividends payable (in dollars per share) | $ / shares	$ 0.21
NBCUniversal Media LLC [Member]
Supplemental Financial Information [Line Items]
Property and equipment and intangible assets accrued but not yet paid	$ 755

Supplemental Financial Infor_10

Supplemental Financial Information (Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Supplemental Financial Information [Line Items]
Cash and cash equivalents	$ 3,507	$ 3,814
Restricted cash included in other current assets	47	46
Restricted cash included in other noncurrent assets, net	48	49
Cash, cash equivalents and restricted cash, end of period	3,602	3,909	$ 14,622	$ 3,571
NBCUniversal Media LLC [Member]
Supplemental Financial Information [Line Items]
Cash and cash equivalents	1,157	1,444
Restricted cash included in other noncurrent assets, net	20	20
Cash, cash equivalents and restricted cash, end of period	$ 1,177	$ 1,464	$ 1,201	$ 2,377

Supplemental Financial Infor_11

Supplemental Financial Information (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains (losses) on marketable securities	$ 7		$ 2
Deferred gains (losses) on cash flow hedges	162		28
Unrecognized gains (losses) on employee benefit obligations	301		294
Cumulative translation adjustments	(1,629)		50
Accumulated other comprehensive income (loss), net of deferred taxes	(1,159)	$ (368)	374
NBCUniversal Media LLC [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Deferred gains (losses) on cash flow hedges	9		5
Unrecognized gains (losses) on employee benefit obligations	131		115
Cumulative translation adjustments	143		(22)
Accumulated other comprehensive income (loss), net of deferred taxes	$ 283	$ 254	$ 98

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Repayments of debt			$ 9,975	$ 4,405
Other noncurrent liabilities	$ 16,853		16,853		$ 15,329
Recognized share-based compensation expense	208	$ 151	636	458
NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Note receivable from Comcast	1,101		1,101		0
Repayments of debt			2,739	387
Other noncurrent liabilities	6,451		6,451		5,177
Recognized share-based compensation expense	45	$ 37	141	$ 115
Comcast and Consolidated Subsidiaries [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Note receivable from Comcast	1,101		1,101		0
Other noncurrent liabilities	459		459		$ 410
Carrying Value of Related Party Contractual Obligation [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Other noncurrent liabilities	383		$ 383
4.00% Notes Due 2049 [Member] | Notes Payable [Member] | Comcast and Consolidated Subsidiaries [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Repayments of debt	$ 610
Interest rate	4.00%		4.00%
Comcast and NBCUniveral Revolving Credit Agreements [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Revolving credit agreement capacity	$ 5,000		$ 5,000
Repayments of debt	1,000
Non-Interest Bearing Notes Due 2024 [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Note receivable from Comcast	$ 1,300		$ 1,300

Related Party Transactions (Con

Related Party Transactions (Condensed Consolidated Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Revenue	$ 26,827		$ 22,135		$ 80,544	$ 66,661
Total costs and expenses	(21,487)		(17,299)		(64,666)	(52,166)
NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Revenue	8,294		8,625		24,866	26,468
Total costs and expenses	$ (6,742)		(6,932)		$ (19,698)	(21,393)
Comcast and Consolidated Subsidiaries [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Revenue		$ 597	506	$ 1,808		1,580
Total costs and expenses		(73)	(59)	(198)		(162)
Interest expense and investment and other income (loss), net		$ (162)	$ (9)	$ (148)		$ (52)

Related Party Transactions (C_2

Related Party Transactions (Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Receivables, net	$ 10,684	$ 11,104
Film and television costs	8,647	7,837
Other noncurrent assets, net	8,883	5,802
Accounts payable and accrued expenses related to trade creditors	10,198	8,494
Accrued expenses and other current liabilities	10,193	10,721
Long-term debt, less current portion	99,847	107,345
Other noncurrent liabilities	16,853	15,329
NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Receivables, net	7,040	7,293
Notes receivable from Comcast, current	4,192	2,054
Film and television costs	7,776	7,292
Note receivable from Comcast, noncurrent	1,101	0
Other noncurrent assets, net	3,444	1,822
Accounts payable and accrued expenses related to trade creditors	1,944	1,933
Accrued expenses and other current liabilities	2,052	2,195
Notes payable to Comcast	91	54
Long-term debt, less current portion	10,574	12,731
Other noncurrent liabilities	6,451	5,177
Comcast and Consolidated Subsidiaries [Member] | NBCUniversal Media LLC [Member]
Related Party Transaction [Line Items]
Receivables, net	533	464
Notes receivable from Comcast, current	4,192	2,054
Film and television costs	21	27
Note receivable from Comcast, noncurrent	1,101	0
Other noncurrent assets, net	71	0
Accounts payable and accrued expenses related to trade creditors	75	78
Accrued expenses and other current liabilities	84	32
Notes payable to Comcast	91	54
Long-term debt, less current portion	158	701
Other noncurrent liabilities	$ 459	$ 410

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Commitment And Contingencies [Line Items]
Operating lease expense inclusive of short-term and variable lease expenses	$ 268		$ 806
Weighted average remaining lease term for operating leases	10 years		10 years
Weighted average discount rate used to calculate operating lease liabilities	3.78%		3.78%
Cash payments for operating leases			$ 700
Rental expense		$ 178		$ 548
Redeemable Subsidiary Preferred Stock [Member] | Level 2 [Member]
Commitment And Contingencies [Line Items]
Temporary equity, fair value of redeemable subsidiary preferred stock	$ 743		$ 743
Sky Limited [Member]
Commitment And Contingencies [Line Items]
Future cash payments related to additional contracts determined to be operating leases					$ 804

Commitments and Contingencies_3

Commitments and Contingencies (Summary of Operating Lease Assets and Liabilities Recorded in the Consolidated Balance Sheets) (Details) - Accounting Standards Update 2016-02 [Member] - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 4,200
Other Noncurrent Assets, Net [Member]
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 4,011
Accrued Expenses and Other Current Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating lease liabilities, current	696
Other Noncurrent Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating lease liabilities, noncurrent	$ 3,863

Commitments and Contingencies_4

Commitments and Contingencies (Summary of Future Minimum Rental Commitments for Operating Leases Under New Accounting Guidance) (Details) $ in Millions	Sep. 30, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining three months of 2019	$ 182
2020	880
2021	763
2022	633
2023	530
Thereafter	2,606
Total future minimum lease payments	5,594
Less: imputed interest	1,035
Total liability	$ 4,559

Commitments and Contingencies_5

Commitments and Contingencies (Summary of Future Minimum Rental Commitments for Operating Leases Under Previous Accounting Guidance and Rent Expense) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
2019			$ 891
2020			824
2021			722
2022			592
2023			513
Thereafter			$ 2,608
Rental expense	$ 178	$ 548

Condensed Consolidating Finan_3

Condensed Consolidating Financial Information (Condensed Consolidating Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 26,827	$ 22,135	$ 80,544	$ 66,661
Costs and Expenses:
Programming and production	8,316	6,711	25,140	20,440
Other operating and administrative	8,090	6,444	24,076	19,323
Advertising, marketing and promotion	1,901	1,667	5,674	4,924
Depreciation	2,124	2,038	6,561	6,070
Amortization	1,056	580	3,215	1,750
Other operating gains	0	(141)	0	(341)
Total costs and expenses	21,487	17,299	64,666	52,166
Operating income (loss)	5,340	4,836	15,878	14,495
Interest expense	(1,167)	(830)	(3,454)	(2,413)
Investment and other income (loss), net	(110)	(111)	511	92
Income (loss) before income taxes	4,063	3,895	12,935	12,174
Income tax (expense) benefit	(775)	(999)	(2,812)	(2,894)
Net income (loss)	3,288	2,896	10,123	9,280
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	71	10	228	60
Net income (loss) attributable to Comcast Corporation	3,217	2,886	9,895	9,220
Comprehensive income (loss) attributable to Comcast Corporation	2,120	2,799	9,104	9,139
Elimination and Consolidation Adjustments [Member]
Revenue:
Revenue	(645)	(593)	(1,861)	(1,762)
Costs and Expenses:
Programming and production	0	0	0	0
Other operating and administrative	(645)	(593)	(1,861)	(1,762)
Advertising, marketing and promotion	0	0	0	0
Depreciation	0	0	0	0
Amortization	0	0	0	0
Other operating gains		0		0
Total costs and expenses	(645)	(593)	(1,861)	(1,762)
Operating income (loss)	0	0	0	0
Interest expense	0	0	0	0
Investment and other income (loss), net	(14,257)	(12,438)	(44,102)	(38,519)
Income (loss) before income taxes	(14,257)	(12,438)	(44,102)	(38,519)
Income tax (expense) benefit	0	0	0	0
Net income (loss)	(14,257)	(12,438)	(44,102)	(38,519)
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	0	0	0	0
Net income (loss) attributable to Comcast Corporation	(14,257)	(12,438)	(44,102)	(38,519)
Comprehensive income (loss) attributable to Comcast Corporation	(12,947)	(12,098)	(43,298)	(38,202)
Comcast Parent [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	326	299	940	889
Costs and Expenses:
Programming and production	0	0	0	0
Other operating and administrative	209	208	575	626
Advertising, marketing and promotion	0	0	0	0
Depreciation	14	12	44	34
Amortization	1	1	4	4
Other operating gains		0		0
Total costs and expenses	224	221	623	664
Operating income (loss)	102	78	317	225
Interest expense	(873)	(600)	(2,646)	(1,739)
Investment and other income (loss), net	3,776	3,299	11,683	10,416
Income (loss) before income taxes	3,005	2,777	9,354	8,902
Income tax (expense) benefit	212	109	541	318
Net income (loss)	3,217	2,886	9,895	9,220
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	0	0	0	0
Net income (loss) attributable to Comcast Corporation	3,217	2,886	9,895	9,220
Comprehensive income (loss) attributable to Comcast Corporation	2,120	2,799	9,104	9,139
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	26,827	22,135	80,544	66,661
Costs and Expenses:
Programming and production	8,316	6,711	25,140	20,440
Other operating and administrative	7,977	6,305	23,715	18,814
Advertising, marketing and promotion	1,901	1,667	5,674	4,924
Depreciation	2,110	2,026	6,517	6,036
Amortization	1,055	579	3,211	1,746
Other operating gains		(141)		(341)
Total costs and expenses	21,359	17,147	64,257	51,619
Operating income (loss)	5,468	4,988	16,287	15,042
Interest expense	(104)	(66)	(279)	(190)
Investment and other income (loss), net	1,390	1,065	5,287	3,977
Income (loss) before income taxes	6,754	5,987	21,295	18,829
Income tax (expense) benefit	(989)	(1,115)	(3,357)	(3,229)
Net income (loss)	5,765	4,872	17,938	15,600
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	71	10	228	60
Net income (loss) attributable to Comcast Corporation	5,694	4,862	17,710	15,540
Comprehensive income (loss) attributable to Comcast Corporation	4,397	4,663	16,857	15,357
Comcast Holdings [Member] | Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Costs and Expenses:
Programming and production	0	0	0	0
Other operating and administrative	0	0	0	0
Advertising, marketing and promotion	0	0	0	0
Depreciation	0	0	0	0
Amortization	0	0	0	0
Other operating gains		0		0
Total costs and expenses	0	0	0	0
Operating income (loss)	0	0	0	0
Interest expense	(3)	(3)	(9)	(9)
Investment and other income (loss), net	3,729	3,380	11,602	10,279
Income (loss) before income taxes	3,726	3,377	11,593	10,270
Income tax (expense) benefit	(2)	(1)	(9)	0
Net income (loss)	3,724	3,376	11,584	10,270
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	0	0	0	0
Net income (loss) attributable to Comcast Corporation	3,724	3,376	11,584	10,270
Comprehensive income (loss) attributable to Comcast Corporation	3,722	3,349	11,600	10,245
CCCL Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	319	294	921	873
Costs and Expenses:
Programming and production	0	0	0	0
Other operating and administrative	319	294	921	873
Advertising, marketing and promotion	0	0	0	0
Depreciation	0	0	0	0
Amortization	0	0	0	0
Other operating gains		0		0
Total costs and expenses	319	294	921	873
Operating income (loss)	0	0	0	0
Interest expense	(47)	(48)	(143)	(143)
Investment and other income (loss), net	3,620	3,007	10,310	8,832
Income (loss) before income taxes	3,573	2,959	10,167	8,689
Income tax (expense) benefit	10	10	30	29
Net income (loss)	3,583	2,969	10,197	8,718
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	0	0	0	0
Net income (loss) attributable to Comcast Corporation	3,583	2,969	10,197	8,718
Comprehensive income (loss) attributable to Comcast Corporation	3,584	2,974	10,201	8,723
NBCUniversal Media Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Costs and Expenses:
Programming and production	0	0	0	0
Other operating and administrative	230	230	726	772
Advertising, marketing and promotion	0	0	0	0
Depreciation	0	0	0	0
Amortization	0	0	0	0
Other operating gains		0		0
Total costs and expenses	230	230	726	772
Operating income (loss)	(230)	(230)	(726)	(772)
Interest expense	(140)	(113)	(377)	(332)
Investment and other income (loss), net	1,632	1,576	5,731	5,107
Income (loss) before income taxes	1,262	1,233	4,628	4,003
Income tax (expense) benefit	(6)	(2)	(17)	(12)
Net income (loss)	1,256	1,231	4,611	3,991
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	0	0	0	0
Net income (loss) attributable to Comcast Corporation	1,256	1,231	4,611	3,991
Comprehensive income (loss) attributable to Comcast Corporation	1,244	1,112	4,640	3,877
Service [Member]
Revenue:
Revenue	26,827	22,135	80,544	66,661
Service [Member] | Elimination and Consolidation Adjustments [Member]
Revenue:
Revenue	0	0	0	0
Service [Member] | Comcast Parent [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Service [Member] | Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	26,827	22,135	80,544	66,661
Service [Member] | Comcast Holdings [Member] | Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Service [Member] | CCCL Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Service [Member] | NBCUniversal Media Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Management Fee [Member]
Revenue:
Revenue	0	0	0	0
Management Fee [Member] | Elimination and Consolidation Adjustments [Member]
Revenue:
Revenue	(645)	(593)	(1,861)	(1,762)
Management Fee [Member] | Comcast Parent [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	326	299	940	889
Management Fee [Member] | Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Management Fee [Member] | Comcast Holdings [Member] | Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	0	0	0	0
Management Fee [Member] | CCCL Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	319	294	921	873
Management Fee [Member] | NBCUniversal Media Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Revenue:
Revenue	$ 0	$ 0	$ 0	$ 0

Condensed Consolidating Finan_4

Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				$ 19,462	$ 18,507
Investing Activities
Net transactions with affiliates				0	0
Capital expenditures		$ (2,511)	$ (2,384)	(6,866)	(6,607)
Cash paid for intangible assets		(608)	(445)	(1,686)	(1,375)
Acquisitions and construction of real estate properties				(40)	(129)
Construction of Universal Beijing Resort				(736)	(257)
Acquisitions, net of cash acquired				(181)	(88)
Proceeds from sales of businesses and investments				208	127
Purchases of investments				(1,697)	(840)
Other				86	579
Net cash provided by (used in) investing activities				(10,912)	(8,590)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				(1,288)	2,909
Proceeds from borrowings				516	9,850
Proceeds from collateralized obligation	$ 5,200			5,175	0
Repurchases and repayments of debt				(9,975)	(4,405)
Repurchases of common stock under repurchase program and employee plans				(432)	(4,282)
Dividends paid				(2,778)	(2,487)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				(235)	(209)
Other				191	(242)
Net cash provided by (used in) financing activities				(8,826)	1,134
Impact of foreign currency on cash, cash equivalents and restricted cash				(31)	0
Increase (decrease) in cash, cash equivalents and restricted cash				(307)	11,051
Cash, cash equivalents and restricted cash, beginning of period				3,909	3,571
Cash, cash equivalents and restricted cash, end of period		3,602	14,622	3,602	14,622
Elimination and Consolidation Adjustments [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				0	0
Investing Activities
Net transactions with affiliates				0	0
Capital expenditures				0	0
Cash paid for intangible assets				0	0
Acquisitions and construction of real estate properties				0	0
Construction of Universal Beijing Resort				0	0
Acquisitions, net of cash acquired				0	0
Proceeds from sales of businesses and investments				0	0
Purchases of investments				0	0
Other				0	0
Net cash provided by (used in) investing activities				0	0
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				0	0
Proceeds from borrowings				0	0
Proceeds from collateralized obligation				0
Repurchases and repayments of debt				0	0
Repurchases of common stock under repurchase program and employee plans				0	0
Dividends paid				0	0
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				0	0
Other				0	0
Net cash provided by (used in) financing activities				0	0
Impact of foreign currency on cash, cash equivalents and restricted cash				0
Increase (decrease) in cash, cash equivalents and restricted cash				0	0
Cash, cash equivalents and restricted cash, beginning of period				0	0
Cash, cash equivalents and restricted cash, end of period		0	0	0	0
Comcast Parent [Member] | Reportable Legal Entities [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				(1,522)	(1,461)
Investing Activities
Net transactions with affiliates				10,333	(1,087)
Capital expenditures				(20)	(15)
Cash paid for intangible assets				(2)	(3)
Acquisitions and construction of real estate properties				(35)	(94)
Construction of Universal Beijing Resort				0	0
Acquisitions, net of cash acquired				0	0
Proceeds from sales of businesses and investments				0	0
Purchases of investments				(25)	(118)
Other				0	0
Net cash provided by (used in) investing activities				10,251	(1,317)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				0	2,117
Proceeds from borrowings				0	9,386
Proceeds from collateralized obligation				0
Repurchases and repayments of debt				(5,513)	(1,900)
Repurchases of common stock under repurchase program and employee plans				(432)	(4,282)
Dividends paid				(2,778)	(2,487)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				0	0
Other				(5)	(56)
Net cash provided by (used in) financing activities				(8,728)	2,778
Impact of foreign currency on cash, cash equivalents and restricted cash				(1)
Increase (decrease) in cash, cash equivalents and restricted cash				0	0
Cash, cash equivalents and restricted cash, beginning of period				0	0
Cash, cash equivalents and restricted cash, end of period		0	0	0	0
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				21,818	21,084
Investing Activities
Net transactions with affiliates				(13,140)	667
Capital expenditures				(6,846)	(6,592)
Cash paid for intangible assets				(1,684)	(1,372)
Acquisitions and construction of real estate properties				(5)	(35)
Construction of Universal Beijing Resort				(736)	(257)
Acquisitions, net of cash acquired				(181)	(88)
Proceeds from sales of businesses and investments				208	60
Purchases of investments				(1,605)	(672)
Other				86	130
Net cash provided by (used in) investing activities				(23,903)	(8,159)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				(1,288)	792
Proceeds from borrowings				516	464
Proceeds from collateralized obligation				5,175
Repurchases and repayments of debt				(2,454)	(2,502)
Repurchases of common stock under repurchase program and employee plans				0	0
Dividends paid				0	0
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				(235)	(209)
Other				236	(186)
Net cash provided by (used in) financing activities				1,950	(1,641)
Impact of foreign currency on cash, cash equivalents and restricted cash				(30)
Increase (decrease) in cash, cash equivalents and restricted cash				(165)	11,284
Cash, cash equivalents and restricted cash, beginning of period				3,493	3,075
Cash, cash equivalents and restricted cash, end of period		3,328	14,359	3,328	14,359
Comcast Holdings [Member] | Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				293	137
Investing Activities
Net transactions with affiliates				(293)	(586)
Capital expenditures				0	0
Cash paid for intangible assets				0	0
Acquisitions and construction of real estate properties				0	0
Construction of Universal Beijing Resort				0	0
Acquisitions, net of cash acquired				0	0
Proceeds from sales of businesses and investments				0	0
Purchases of investments				0	0
Other				0	449
Net cash provided by (used in) investing activities				(293)	(137)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				0	0
Proceeds from borrowings				0	0
Proceeds from collateralized obligation				0
Repurchases and repayments of debt				0	0
Repurchases of common stock under repurchase program and employee plans				0	0
Dividends paid				0	0
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				0	0
Other				0	0
Net cash provided by (used in) financing activities				0	0
Impact of foreign currency on cash, cash equivalents and restricted cash				0
Increase (decrease) in cash, cash equivalents and restricted cash				0	0
Cash, cash equivalents and restricted cash, beginning of period				0	0
Cash, cash equivalents and restricted cash, end of period		0	0	0	0
CCCL Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				(217)	(206)
Investing Activities
Net transactions with affiliates				217	206
Capital expenditures				0	0
Cash paid for intangible assets				0	0
Acquisitions and construction of real estate properties				0	0
Construction of Universal Beijing Resort				0	0
Acquisitions, net of cash acquired				0	0
Proceeds from sales of businesses and investments				0	0
Purchases of investments				0	0
Other				0	0
Net cash provided by (used in) investing activities				217	206
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				0	0
Proceeds from borrowings				0	0
Proceeds from collateralized obligation				0
Repurchases and repayments of debt				0	0
Repurchases of common stock under repurchase program and employee plans				0	0
Dividends paid				0	0
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				0	0
Other				0	0
Net cash provided by (used in) financing activities				0	0
Impact of foreign currency on cash, cash equivalents and restricted cash				0
Increase (decrease) in cash, cash equivalents and restricted cash				0	0
Cash, cash equivalents and restricted cash, beginning of period				0	0
Cash, cash equivalents and restricted cash, end of period		0	0	0	0
NBCUniversal Media Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash provided by (used in) operating activities				(910)	(1,047)
Investing Activities
Net transactions with affiliates				2,883	800
Capital expenditures				0	0
Cash paid for intangible assets				0	0
Acquisitions and construction of real estate properties				0	0
Construction of Universal Beijing Resort				0	0
Acquisitions, net of cash acquired				0	0
Proceeds from sales of businesses and investments				0	67
Purchases of investments				(67)	(50)
Other				0	0
Net cash provided by (used in) investing activities				2,816	817
Financing Activities
Proceeds from (repayments of) short-term borrowings, net				0	0
Proceeds from borrowings				0	0
Proceeds from collateralized obligation				0
Repurchases and repayments of debt				(2,008)	(3)
Repurchases of common stock under repurchase program and employee plans				0	0
Dividends paid				0	0
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock				0	0
Other				(40)	0
Net cash provided by (used in) financing activities				(2,048)	(3)
Impact of foreign currency on cash, cash equivalents and restricted cash				0
Increase (decrease) in cash, cash equivalents and restricted cash				(142)	(233)
Cash, cash equivalents and restricted cash, beginning of period				416	496
Cash, cash equivalents and restricted cash, end of period		$ 274	$ 263	$ 274	$ 263

Condensed Consolidating Finan_5

Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Assets
Cash and cash equivalents	$ 3,507	$ 3,814
Receivables, net	10,684	11,104
Programming rights	3,457	3,746
Other current assets	4,675	3,184
Total current assets	22,323	21,848
Film and television costs	8,647	7,837
Investments	7,473	7,883
Investment securing collateralized obligation	816	0
Investments in and amounts due from subsidiaries eliminated upon consolidation	0	0
Property and equipment, net	46,790	44,437
Franchise rights	59,365	59,365
Goodwill	66,913	66,154
Other intangible assets, net	35,164	38,358
Other noncurrent assets, net	8,883	5,802
Total assets	256,374	251,684
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	10,198	8,494
Accrued participations and residuals	1,615	1,808
Deferred revenue	2,944	2,182
Accrued expenses and other current liabilities	10,193	10,721
Current portion of long-term debt	1,039	4,398
Total current liabilities	25,989	27,603
Long-term debt, less current portion	99,847	107,345
Collateralized obligation	5,165	0
Deferred income taxes	27,992	27,589
Other noncurrent liabilities	16,853	15,329
Redeemable noncontrolling interests	1,368	1,316
Equity:
Common stock	54	54
Other shareholders’ equity	78,090	71,559
Total Comcast Corporation shareholders’ equity	78,144	71,613
Noncontrolling interests	1,016	889
Total equity	79,160	72,502	$ 72,345
Total liabilities and equity	256,374	251,684
Elimination and Consolidation Adjustments [Member]
Assets
Cash and cash equivalents	0	0
Receivables, net	0	0
Programming rights	0	0
Other current assets	0	0
Total current assets	0	0
Film and television costs	0	0
Investments	0	0
Investment securing collateralized obligation	0
Investments in and amounts due from subsidiaries eliminated upon consolidation	(593,909)	(586,231)
Property and equipment, net	0	0
Franchise rights	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Other noncurrent assets, net	(417)	(458)
Total assets	(594,326)	(586,689)
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	0	0
Accrued participations and residuals	0	0
Deferred revenue	0	0
Accrued expenses and other current liabilities	0	0
Current portion of long-term debt	0	0
Total current liabilities	0	0
Long-term debt, less current portion	0	0
Collateralized obligation	0
Deferred income taxes	(562)	(524)
Other noncurrent liabilities	145	66
Redeemable noncontrolling interests	0	0
Equity:
Common stock	0	0
Other shareholders’ equity	(593,909)	(586,231)
Total Comcast Corporation shareholders’ equity	(593,909)	(586,231)
Noncontrolling interests	0	0
Total equity	(593,909)	(586,231)
Total liabilities and equity	(594,326)	(586,689)
Comcast Parent [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	0	0
Receivables, net	0	0
Programming rights	0	0
Other current assets	128	66
Total current assets	128	66
Film and television costs	0	0
Investments	275	270
Investment securing collateralized obligation	0
Investments in and amounts due from subsidiaries eliminated upon consolidation	158,369	157,264
Property and equipment, net	664	670
Franchise rights	0	0
Goodwill	0	0
Other intangible assets, net	8	11
Other noncurrent assets, net	1,025	1,057
Total assets	160,469	159,338
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	0	2
Accrued participations and residuals	0	0
Deferred revenue	0	0
Accrued expenses and other current liabilities	2,421	2,357
Current portion of long-term debt	0	699
Total current liabilities	2,421	3,058
Long-term debt, less current portion	76,654	81,661
Collateralized obligation	0
Deferred income taxes	0	0
Other noncurrent liabilities	3,250	3,006
Redeemable noncontrolling interests	0	0
Equity:
Common stock	54	54
Other shareholders’ equity	78,090	71,559
Total Comcast Corporation shareholders’ equity	78,144	71,613
Noncontrolling interests	0	0
Total equity	78,144	71,613
Total liabilities and equity	160,469	159,338
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	3,233	3,398
Receivables, net	10,684	11,104
Programming rights	3,457	3,746
Other current assets	4,502	3,070
Total current assets	21,876	21,318
Film and television costs	8,647	7,837
Investments	5,988	6,669
Investment securing collateralized obligation	816
Investments in and amounts due from subsidiaries eliminated upon consolidation	98,744	97,872
Property and equipment, net	46,126	43,767
Franchise rights	59,365	59,365
Goodwill	66,913	66,154
Other intangible assets, net	35,156	38,347
Other noncurrent assets, net	8,014	4,910
Total assets	351,645	346,239
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	10,198	8,492
Accrued participations and residuals	1,615	1,808
Deferred revenue	2,944	2,182
Accrued expenses and other current liabilities	6,857	7,572
Current portion of long-term debt	1,032	3,695
Total current liabilities	22,646	23,749
Long-term debt, less current portion	15,190	15,690
Collateralized obligation	5,165
Deferred income taxes	28,142	27,734
Other noncurrent liabilities	11,903	11,056
Redeemable noncontrolling interests	1,368	1,316
Equity:
Common stock	0	0
Other shareholders’ equity	266,215	265,805
Total Comcast Corporation shareholders’ equity	266,215	265,805
Noncontrolling interests	1,016	889
Total equity	267,231	266,694
Total liabilities and equity	351,645	346,239
Comcast Holdings [Member] | Subsidiary Issuer [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	0	0
Receivables, net	0	0
Programming rights	0	0
Other current assets	22	20
Total current assets	22	20
Film and television costs	0	0
Investments	12	11
Investment securing collateralized obligation	0
Investments in and amounts due from subsidiaries eliminated upon consolidation	149,186	147,028
Property and equipment, net	0	0
Franchise rights	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Other noncurrent assets, net	166	208
Total assets	149,386	147,267
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	0	0
Accrued participations and residuals	0	0
Deferred revenue	0	0
Accrued expenses and other current liabilities	244	150
Current portion of long-term debt	0	0
Total current liabilities	244	150
Long-term debt, less current portion	152	146
Collateralized obligation	0
Deferred income taxes	344	314
Other noncurrent liabilities	0	0
Redeemable noncontrolling interests	0	0
Equity:
Common stock	0	0
Other shareholders’ equity	148,646	146,657
Total Comcast Corporation shareholders’ equity	148,646	146,657
Noncontrolling interests	0	0
Total equity	148,646	146,657
Total liabilities and equity	149,386	147,267
CCCL Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	0	0
Receivables, net	0	0
Programming rights	0	0
Other current assets	0	0
Total current assets	0	0
Film and television costs	0	0
Investments	159	143
Investment securing collateralized obligation	0
Investments in and amounts due from subsidiaries eliminated upon consolidation	132,753	130,214
Property and equipment, net	0	0
Franchise rights	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Other noncurrent assets, net	0	0
Total assets	132,912	130,357
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	0	0
Accrued participations and residuals	0	0
Deferred revenue	0	0
Accrued expenses and other current liabilities	256	360
Current portion of long-term debt	0	0
Total current liabilities	256	360
Long-term debt, less current portion	2,100	2,100
Collateralized obligation	0
Deferred income taxes	0	0
Other noncurrent liabilities	0	0
Redeemable noncontrolling interests	0	0
Equity:
Common stock	0	0
Other shareholders’ equity	130,556	127,897
Total Comcast Corporation shareholders’ equity	130,556	127,897
Noncontrolling interests	0	0
Total equity	130,556	127,897
Total liabilities and equity	132,912	130,357
NBCUniversal Media Parent [Member] | Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Assets
Cash and cash equivalents	274	416
Receivables, net	0	0
Programming rights	0	0
Other current assets	23	28
Total current assets	297	444
Film and television costs	0	0
Investments	1,039	790
Investment securing collateralized obligation	0
Investments in and amounts due from subsidiaries eliminated upon consolidation	54,857	53,853
Property and equipment, net	0	0
Franchise rights	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Other noncurrent assets, net	95	85
Total assets	56,288	55,172
Liabilities and Equity
Accounts payable and accrued expenses related to trade creditors	0	0
Accrued participations and residuals	0	0
Deferred revenue	0	0
Accrued expenses and other current liabilities	415	282
Current portion of long-term debt	7	4
Total current liabilities	422	286
Long-term debt, less current portion	5,751	7,748
Collateralized obligation	0
Deferred income taxes	68	65
Other noncurrent liabilities	1,555	1,201
Redeemable noncontrolling interests	0	0
Equity:
Common stock	0	0
Other shareholders’ equity	48,492	45,872
Total Comcast Corporation shareholders’ equity	48,492	45,872
Noncontrolling interests	0	0
Total equity	48,492	45,872
Total liabilities and equity	$ 56,288	$ 55,172

Uncategorized Items - cmcsa-930

Label	Element	Value
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(43,000,000)
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	76,000,000
AOCI Attributable to Parent [Member] | NBCUniversal Media LLC [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	232,000,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Member's Capital [Member] | NBCUniversal Media LLC [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(232,000,000)
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0