Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,071	$ 928	$ 864
Change in net unrealized gain on securities available for sale:
Net unrealized (loss) gain	(468)	470	(43)
Reclassification of impairment charges included in net impairment losses on securities	10	32	31
Other reclassifications included in other revenue	(7)	(38)	1
Other	1	1	(1)
Other comprehensive (loss) income, before tax	(464)	465	(12)
Income tax effect	175	(175)	4
Other comprehensive (loss) income, net of tax	(289)	290	(8)
Comprehensive Income	$ 782	$ 1,218	$ 856