Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities:
Net income	$ 1,141	$ 1,479
Adjustments to reconcile net income to net cash from operating activities:
Provision for credit losses	532	805
Adjustment to income tax provision	516
Depreciation	233	207
Amortization of intangibles	80	82
Equity-based compensation	85	79
(Gain) loss on securities, net	(46)	12
Net write-downs/losses on foreclosed property	25	152
Net change in operating assets and liabilities:
LHFS	809	(143)
FDIC loss share receivable	282	436
Other assets	(771)	(653)
Accounts payable and other liabilities	(1,076)	438
Other, net	(60)	(224)
Net cash from operating activities	1,750	2,670
Cash Flows From Investing Activities:
Proceeds from sales of AFS securities	988	249
Proceeds from maturities, calls and paydowns of AFS securities	5,101	2,959
Purchases of AFS securities	(4,667)	(4,453)
Proceeds from maturities, calls and paydowns of HTM securities	2,659	3,566
Purchases of HTM securities	(2,619)	(1,169)
Originations and purchases of loans and leases, net of principal collected	(2,095)	(5,773)
Net cash for acquisitions	(6)	692
Purchases of premises and equipment	(216)	(117)
Proceeds from sales of foreclosed property	331	677
Other, net	507	95
Net cash from investing activities	(17)	(3,274)
Cash Flows From Financing Activities:
Net change in deposits	(5,590)	1,618
Net change in short-term borrowings	1,949	(473)
Proceeds from issuance of long-term debt	2,639	1,828
Repayment of long-term debt	(1,275)	(4,538)
Net cash from preferred stock transactions	487	1,679
Cash dividends paid on common stock	(610)	(391)
Cash dividends paid on preferred stock	(110)	(8)
Other, net	207	48
Net cash from financing activities	(2,303)	(237)
Net Change in Cash and Cash Equivalents	(570)	(841)
Cash and Cash Equivalents at Beginning of Period	3,039	4,344
Cash and Cash Equivalents at End of Period	2,469	3,503
Supplemental Disclosure of Cash Flow Information:
Cash paid (received) during the period for interest	695	839
Cash paid (received) during the period for income taxes	510	344
Noncash investing activities:
Transfers of loans to foreclosed property	420	558
Purchases of securities HTM not yet settled		$ 1,450