Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OCI Statement [Abstract]
Net income	$ 1,729	$ 2,028	$ 1,332
OCI, Net of Tax
Change in unrecognized pension and postretirement amounts	411	(111)	(235)
Change in unrecognized gains (losses) on cash flow hedges	175	(14)	(112)
Unrealized net holding gains (losses) arising during the period on AFS securities	(640)	327	437
Change in amounts attributable to the FDIC under loss shares agreements	21	(61)	(19)
Other, net	(1)	13	(37)
Total OCI	(34)	154	34
Total comprehensive income	1,695	2,182	1,366
Tax Effect Of Items Included In OCI [Abstract]
Change in unrecognized pension and postretirement amounts	(252)	70	143
Change in unrecognized gains (losses) on cash flow hedges	106	(9)	(67)
Unrealized net holding gains (losses) arising during the period on AFS securities	(384)	200	261
Change in amounts attributable to the FDIC under loss shares agreements	14	(38)	(11)
Other, net	$ 2	$ 6	$ (21)