Parent Company Financial Statements (Parent Company Statement Of Income) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Total revenue	$ 9,884	$ 9,649	$ 9,594
Other expenses	547	591	459
Total expenses	7,192	6,886	7,058
Income tax benefit	550	705	616
Net income	2,136	2,061	1,920
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash dividends from consolidated banking subsidiary	1,694	1,785	0
Cash dividends from consolidated non-banking subsidiaries and unconsolidated entities	250	68	60
Other, net	35	38	34
Total revenue	1,979	1,891	94
Interest expense	169	163	203
Other expenses	88	85	60
Total expenses	257	248	263
Income tax benefit	(84)	(63)	(125)
Income (loss) before equity in undistributed income of consolidated subsidiaries and unconsolidated entities	1,806	1,706	(44)
Consolidated banking subsidiary	237	173	1,773
Consolidated non-banking subsidiaries and unconsolidated entities	93	182	191
Net income	$ 2,136	$ 2,061	$ 1,920