CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 1,114	$ 1,081	$ 3,130	$ 3,429
Other comprehensive income (loss) before taxes:
Net unrealized gains (losses) on securities available for sale	98	(104)	29	394
Net changes in securities held to maturity	41	35	114	96
Net unrealized gains (losses) on cash flow hedges	365	(107)	494	37
Foreign currency translation adjustments	(15)	(41)	(77)	25
Other	(15)	6	(19)	2
Other comprehensive income before taxes	474	(211)	541	554
Income tax provision related to other comprehensive income	219	(23)	253	241
Other comprehensive income (loss), net of tax	255	(188)	288	313
Comprehensive income	$ 1,369	$ 893	$ 3,418	$ 3,742