Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 496	$ 0	$ 438
Cash Flows from Operating Activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,785	1,361	1,984
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Gain (Loss) on Disposition of Business	(105)	0	0
Depreciation, Amortization and Accretion, Net	693	708	757
Goodwill, Impairment Loss	0	0	7
Origination of Mortgage Servicing Rights (MSRs)	(178)	(352)	(336)
Provisions for credit losses and foreclosed property	364	605	1,535
Mortgage repurchase provision	12	114	713
Deferred Income Tax Expense (Benefit)	99	495	194
Stock Option Compensation And Amortization Of Restricted Stock Compensation	54	53	62
Gain (Loss) on Sale of Securities, Net	15	(2)	(1,974)
Net gain on sale of assets	(343)	(267)	(1,063)
Net decrease/(increase) in loans held for sale	(1,567)	2,104	194
Increase (Decrease) in Trading Securities	(1,529)	770	170
Net (increase)/decrease in other assets	(51)	(533)	807
Increase (Decrease) in Other Operating Liabilities	(431)	(846)	(1,053)
Net Cash Provided by (Used in) Operating Activities	(1,182)	4,210	2,013
Cash Flows from Investing Activities:
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities	4,707	5,522	7,371
Proceeds from sales of securities available for sale	2,470	2,063	4,300
Purchases of securities available for sale	(11,039)	(9,215)	(5,814)
Proceeds from sales of trading securities	59	8	0
Proceeds from (payments for) Originations and Purchases of Loans Held-for-investment	(9,843)	(8,409)	(6,400)
Proceeds from sales of loans	4,090	819	4,916
Servicing Assets at Fair Value, Purchased	(130)	0	0
Capital expenditures	(147)	(200)	(206)
Payments related to acquisitions, including contingent consideration	(11)	(3)	(12)
Proceeds from Divestiture of Businesses	193	0	0
Proceeds from Sale of Other Real Estate	378	472	585
Net cash (used in)/provided by investing activities	(9,273)	(8,943)	4,740
Cash Flows from Financing Activities:
Net (decrease)/increase in total deposits	10,808	(2,557)	4,394
Net increase/(decrease) in funds purchased, securities sold under agreements to repurchase, and other short-term borrowings	447	3,245	(5,972)
Proceeds from Issuance of Long-term Debt	2,574	1,564	4,000
Repayment of long-term debt	(53)	(155)	(5,772)
Payments for Repurchase of Common Stock	(458)	(150)	0
Common and preferred dividends paid	(409)	(225)	(119)
Stock option activity	16	17	26
Net cash provided by/(used in) financing activities	13,421	1,739	(3,005)
Net (decrease)/increase in cash and cash equivalents	2,966	(2,994)	3,748
Cash and cash equivalents at beginning of period	5,263	8,257	4,509
Cash and cash equivalents at end of period	8,229	5,263	8,257
Supplemental Disclosures:
Transfer of Loans Held-for-sale to Portfolio Loans	44	43	71
Loans transferred from loans to loans held for sale	3,280	280	3,695
Transfer to Other Real Estate	148	255	399
non-cash impact of deconsolidated assets	282	0	0
Amortization Of Deferred Gain On Sale Lease Back Of Premises	53	58	67
Gains (Losses) on Extinguishment of Debt	0	0	16
Interest Paid	534	533	774
Income Taxes Paid	380	168	607
Proceeds from Income Tax Refunds	$ (219)	$ (99)	$ (1)