Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities:
Net income	$ 983	$ 561
Adjustments to reconcile net income to net cash from operating activities:
Provision for credit losses	561	668
Depreciation	131	129
Amortization of intangibles	51	51
Equity-based compensation	51	49
(Gain) loss on securities, net	11	2
Net write-downs/losses on foreclosed property	120	208
Net change in operating assets and liabilities:
Segregated cash due from banks	16	290
Loans held for sale	579	1,294
FDIC loss share receivable	269	427
Other assets	(677)	214
Accounts payable and other liabilities	699	(57)
Other, net	(159)	17
Net cash from operating activities	2,635	3,853
Cash Flows From Investing Activities:
Proceeds from sales of securities available for sale	153	330
Proceeds from maturities, calls and paydowns of securities available for sale	1,782	1,728
Purchases of securities available for sale	(4,400)	(6,250)
Proceeds from maturities, calls and paydowns of securities held to maturity	2,138	312
Purchases of securities held to maturity	(619)	(523)
Originations and purchases of loans and leases, net of principal collected	(4,115)	(965)
Net cash paid for acquisitions	(555)	0
Purchases of premises and equipment	(61)	(104)
Proceeds from sales of foreclosed property or other real estate held for sale	500	480
Other, net	78	53
Net cash from investing activities	(5,099)	(4,939)
Cash Flows From Financing Activities:
Net change in deposits	1,120	924
Net change in federal funds purchased, securities sold under repurchase agreements and short-term borrowed funds	(370)	(831)
Proceeds from issuance of long-term debt	1,072	1,999
Repayment of long-term debt	(197)	(392)
Net cash from common stock transactions	(3)	17
Net cash from preferred stock transactions	559	0
Cash dividends paid on common stock	(251)	(223)
Other, net	57	(7)
Net cash from financing activities	1,987	1,487
Net Change in Cash and Cash Equivalents	(477)	401
Cash and Cash Equivalents at Beginning of Period	4,344	2,385
Cash and Cash Equivalents at End of Period	3,867	2,786
Supplemental Disclosure of Cash Flow Information:
Cash paid during the period for interest	579	719
Cash paid (received) during the period for income taxes	317	(236)
Noncash investing and financing activities:
Transfer of securities available for sale to securities held to maturity	1	8,341
Transfers of loans to foreclosed property	$ 269	$ 641