Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Jan. 28, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2012
Consolidated Statement of Comprehensive Income
Net income (loss)	$ (25)	$ 1,721	$ 501	$ 1,307	$ 2,687
Employee benefit obligations, net	4	15	(4)	(9)	6
Currency translation adjustments, net	1	20	(8)	(2)	11
Other, net	(2)	(1)		(2)
Comprehensive income (loss)	(22)	1,755	489	1,294	2,704
Net (income) loss attributable to noncontrolling interests	2	(49)	(32)	(118)	(117)
Comprehensive income (loss) attributable to NBCUniversal	$ (20)	$ 1,706	$ 457	$ 1,176	$ 2,587