Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities:
Net income	$ 1,729	$ 2,028	$ 1,332
Adjustments to reconcile net income to net cash from operating activities:
Provision for credit losses	592	1,057	1,190
Adjustment to income tax provision	516
Depreciation	315	281	264
Amortization of intangibles	106	110	99
Deferred tax expense	288	419	185
Equity-based compensation	96	97	98
(Gain) loss on securities, net	(51)	12	(62)
Net write-downs/losses on foreclosed property	28	168	655
Net change in operating assets and liabilities:
LHFS	2,445	(433)	(583)
FDIC loss share receivable/payable	365	590	869
Other assets	(273)	(800)	(240)
Accounts payable and other liabilities	(812)	346	572
Other, net	(5)	(161)	(103)
Net cash from operating activities	5,339	3,714	4,276
Cash Flows From Investing Activities:
Proceeds from sales of AFS securities	2,209	303	4,006
Proceeds from maturities, calls and paydowns of AFS securities	6,214	4,396	3,271
Purchases of AFS securities	(6,463)	(7,026)	(13,926)
Proceeds from maturities, calls and paydowns of HTM securities	2,863	5,536	1,828
Purchases of HTM securities	(7,399)	(5,055)	(7,578)
Originations and purchases of loans and leases, net of principal collected	(3,077)	(6,651)	(6,240)
Net cash from divestitures	522
Net cash from business combinations	(6)	675	(86)
Proceeds from sales of foreclosed property	394	799	1,017
Other, net	503	(24)	(299)
Net cash from investing activities	(4,240)	(7,047)	(18,007)
Cash Flows From Financing Activities:
Net change in deposits	(5,600)	4,676	17,799
Net change in short-term borrowings	1,274	(702)	(2,107)
Proceeds from issuance of long-term debt	4,164	2,327	2,010
Repayment of long-term debt	(1,634)	(5,112)	(2,190)
Net cash from preferred stock transactions	487	2,116
Cash dividends paid on common stock	(765)	(531)	(446)
Cash dividends paid on preferred stock	(147)	(33)
Other, net	248	55	154
Net cash from financing activities	(1,973)	2,796	15,220
Net Change in Cash and Cash Equivalents	(874)	(537)	1,489
Cash and Cash Equivalents at Beginning of Period	3,039	3,576	2,087
Cash and Cash Equivalents at End of Period	2,165	3,039	3,576
Supplemental Disclosure of Cash Flow Information:
Cash paid (received) during the period for interest	918	1,120	1,404
Cash paid (received) during the period for income taxes	677	347	(82)
Noncash investing activities:
Transfer of securities available for sale to securities held to maturity		1	8,341
Transfers of loans to foreclosed property	609	770	1,359
Transfers of loans held for investment to LHFS			$ 226