Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 26,858	$ 21,735	$ 53,717	$ 44,526
Costs and Expenses:
Programming and production	8,255	6,300	16,824	13,729
Other operating and administrative	8,086	6,365	15,986	12,879
Advertising, marketing and promotion	1,885	1,653	3,773	3,257
Depreciation	2,197	2,021	4,437	4,032
Amortization	1,079	582	2,159	1,170
Other operating gains	0	(200)	0	(200)
Total costs and expenses	21,502	16,721	43,179	34,867
Operating income	5,356	5,014	10,538	9,659
Interest expense	(1,137)	(806)	(2,287)	(1,583)
Investment and other income (loss), net	(55)	77	621	203
Income before income taxes	4,164	4,285	8,872	8,279
Income tax expense	(961)	(1,077)	(2,037)	(1,895)
Net income	3,203	3,208	6,835	6,384
Less: Net income (loss) attributable to noncontrolling interests and redeemable subsidiary preferred stock	78	(8)	157	50
Net income attributable to Comcast Corporation	$ 3,125	$ 3,216	$ 6,678	$ 6,334
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.69	$ 0.70	$ 1.47	$ 1.37
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 0.68	$ 0.69	$ 1.45	$ 1.36
NBCUniversal Media LLC [Member]
Revenue	$ 8,227	$ 8,313	$ 16,572	$ 17,843
Costs and Expenses:
Programming and production	3,217	3,478	6,651	8,051
Other operating and administrative	2,048	1,955	3,930	3,927
Advertising, marketing and promotion	651	720	1,333	1,420
Depreciation	253	258	496	500
Amortization	274	295	546	563
Total costs and expenses	6,443	6,706	12,956	14,461
Operating income	1,784	1,607	3,616	3,382
Interest expense	(122)	(133)	(253)	(260)
Investment and other income (loss), net	40	(168)	280	(172)
Income before income taxes	1,702	1,306	3,643	2,950
Income tax expense	(73)	(88)	(176)	(179)
Net income	1,629	1,218	3,467	2,771
Less: Net income (loss) attributable to noncontrolling interests	58	(29)	112	11
Net income attributable to Comcast Corporation	$ 1,571	$ 1,247	$ 3,355	$ 2,760