Consolidated Statement of Income (NBCUniversal) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue	$ 19,245	$ 18,669	$ 18,743	$ 17,853	$ 17,732	$ 16,791	$ 16,844	$ 17,408	$ 74,510	$ 68,775	$ 64,657
Costs and Expenses:
Programming and production									22,550	20,912	19,670
Other operating and administrative									21,339	19,854	18,575
Advertising, marketing and promotion									5,943	5,086	4,978
Depreciation									6,781	6,337	6,254
Amortization									1,899	1,682	1,617
Total costs and expenses									58,512	53,871	51,094
Operating income	4,002	4,001	4,105	3,890	3,787	3,745	3,804	3,568	15,998	14,904	13,563
Other Income (Expense):
Interest expense									(2,702)	(2,617)	(2,574)
Investment income (loss), net									81	296	576
Equity in net income (losses) of investees, net									(325)	97	(86)
Other income (expense), net									320	(215)	(364)
Nonoperating income (expense)									(2,626)	(2,439)	(2,448)
Income before income taxes									13,372	12,465	11,115
Income tax expense									(4,959)	(3,873)	(3,980)
Net income									8,413	8,592	7,135
Net income attributable to Parent	$ 1,971	$ 1,996	$ 2,137	$ 2,059	$ 1,925	$ 2,592	$ 1,992	$ 1,871	8,163	8,380	6,816
NBCUniversal Media LLC [Member]
Revenue									28,462	25,428	23,650
Costs and Expenses:
Programming and production									13,418	12,318	11,770
Other operating and administrative									5,891	5,364	4,949
Advertising, marketing and promotion									2,795	2,158	2,199
Depreciation									669	654	639
Amortization									870	841	772
Total costs and expenses									23,643	21,335	20,329
Operating income									4,819	4,093	3,321
Other Income (Expense):
Interest expense									(495)	(508)	(515)
Investment income (loss), net									5	27	17
Equity in net income (losses) of investees, net									(376)	46	(93)
Other income (expense), net									(102)	(218)	(402)
Nonoperating income (expense)									(968)	(653)	(993)
Income before income taxes									3,851	3,440	2,328
Income tax expense									(227)	(143)	(206)
Net income									3,624	3,297	2,122
Net (income) loss attributable to noncontrolling interests									(210)	(182)	(154)
Net income attributable to Parent									$ 3,414	$ 3,115	$ 1,968