Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Comprehensive Income
Net income	$ 13	$ 60	$ 8	$ 594
Other comprehensive income (loss)
Change in net unrealized gain / loss on securities	882	914	1,870	1,801
Change in OTTI losses recognized in other comprehensive income	35	10	40	11
Change in net gain / loss on cash-flow hedging instruments	(1)	154	27	157
Change in foreign currency translation adjustments	88	78	8	104
Change in pension and other postretirement plan adjustments	(35)	(24)	(99)	(72)
Total other comprehensive income	1,039	1,180	2,044	2,145
Total comprehensive income	$ 1,052	$ 1,240	$ 2,052	$ 2,739