Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Consolidated Statement of Comprehensive Income (Unaudited)
Net income	$ 812	$ 683	$ 1,645	$ 1,735
Other comprehensive income (loss):
Changes in net unrealized gains on investment securities having no credit losses recognized in the consolidated statement of income	(1,065)	518	(896)	1,055
Changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income	(5)	1	(10)	3
Net changes in benefit plan assets and obligations	23	15	47	30
Net changes in unrealized foreign currency translation	94	97	(180)	54
Other comprehensive income (loss) before income taxes	(953)	631	(1,039)	1,142
Income tax expense (benefit)	(353)	196	(328)	390
Other comprehensive income (loss), net of taxes	(600)	435	(711)	752
Comprehensive income	$ 212	$ 1,118	$ 934	$ 2,487