Condensed Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	$ 2,633,000,000	$ 1,778,000,000	$ 6,596,000,000	$ 5,167,000,000
Unrealized gains (losses) on marketable securities, net of deferred taxes	0	19,000,000	34,000,000	136,000,000
Deferred gains (losses) on cash flow hedges, net of deferred taxes	(4,000,000)	45,000,000	(2,000,000)	10,000,000
Amounts Reclassified To Net Income:
Realized (gains) losses on marketable securities, net of deferred taxes	(1,000,000)	(278,000,000)	(98,000,000)	(301,000,000)
Realized (gains) losses on cash flow hedges, net of deferred taxes	38,000,000	(38,000,000)	18,000,000	10,000,000
Employee benefit obligations, net of deferred taxes	0	57,000,000	(1,000,000)	60,000,000
Currency translation adjustments, net of deferred taxes	(16,000,000)	8,000,000	(4,000,000)	(23,000,000)
Comprehensive income	2,650,000,000	1,591,000,000	6,543,000,000	5,059,000,000
Net (income) loss attributable to noncontrolling interests and redeemable subsidiary preferred stock	(41,000,000)	(46,000,000)	(141,000,000)	(264,000,000)
Other comprehensive (income) loss attributable to noncontrolling interests	0	0	0	9,000,000
Comprehensive income attributable to Parent	2,609,000,000	1,545,000,000	6,402,000,000	4,804,000,000
NBCUniversal Media, LLC [Member]
Net income	833,000,000	278,000,000	2,416,000,000	1,319,000,000
Unrealized gains (losses) on marketable securities, net of deferred taxes	(2,000,000)	0	3,000,000	0
Deferred gains (losses) on cash flow hedges, net of deferred taxes	11,000,000	(5,000,000)	9,000,000	(5,000,000)
Amounts Reclassified To Net Income:
Employee benefit obligations, net of deferred taxes	0	0	0	(1,000,000)
Currency translation adjustments, net of deferred taxes	(26,000,000)	13,000,000	(8,000,000)	(32,000,000)
Comprehensive income	816,000,000	286,000,000	2,420,000,000	1,281,000,000
Net (income) loss attributable to noncontrolling interests	(31,000,000)	(42,000,000)	(118,000,000)	(105,000,000)
Comprehensive income attributable to Parent	$ 785,000,000	$ 244,000,000	$ 2,302,000,000	$ 1,176,000,000