CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 1,013	$ 1,153
After Tax
Net unrealized gains (losses) on securities available for sale	187	122
Net changes in securities held to maturity	21	20
Net unrealized gains (losses) on cash flow hedges	377	162
Foreign currency translation adjustments	1	(84)
Other	(11)	(2)
Other comprehensive income (loss), net of tax	575	218
Comprehensive income	$ 1,588	$ 1,371