Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statement of Comprehensive Income (Unaudited)
Net income	$ 928	$ 919	$ 2,573	$ 2,654
Other comprehensive income (loss):
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	67	(154)	(829)	901
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	(3)	1	(13)	4
Net changes in benefit plan assets and obligations	24	15	71	45
Net changes in unrealized foreign currency translation	(227)	(203)	(407)	(149)
Other comprehensive income (loss) before income taxes	(139)	(341)	(1,178)	801
Income tax expense (benefit)	(2)	(79)	(330)	311
Other comprehensive income (loss), net of taxes	(137)	(262)	(848)	490
Comprehensive income	$ 791	$ 657	$ 1,725	$ 3,144