Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statement of Comprehensive Income (Unaudited)
Net income (loss)	$ 499	$ (364)	$ 1,305	$ 475
Other comprehensive income:
Change in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	216	645	139	539
Change in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	5	(10)	30	18
Net changes in benefit plan assets and obligations	22	19	42	37
Net changes in unrealized foreign currency translation and other changes	(86)	16	(22)	86
Other comprehensive income before income taxes	157	670	189	680
Income tax expense, other comprehensive income	66	231	64	224
Other comprehensive income, net of taxes	91	439	125	456
Comprehensive income	$ 590	$ 75	$ 1,430	$ 931