Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Comprehensive Income
Net income (loss)	$ 662	$ 1,680	$ (887)
Other comprehensive income
Change in net unrealized gain (loss) on securities	1,979	1,707	5,909
Change in OTTI losses recognized in other comprehensive income	9	116	(224)
Change in net gain / loss on cash-flow hedging instruments	131	128	(387)
Change in foreign currency translation adjustments	112	289	(23)
Change in pension and other postretirement plan adjustment	(73)	(123)	(155)
Total other comprehensive income	2,158	2,117	5,120
Total comprehensive income	$ 2,820	$ 3,797	$ 4,233