Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		$ (681)	$ 3,552	$ (1,160)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,887	1,943	1,785
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Gain (Loss) on Disposition of Business		0	0	(105)
Depreciation, Amortization and Accretion, Net		725	786	693
Payments to Acquire Mortgage Servicing Rights (MSR)		(312)	(238)	(178)
Provisions For Credit Losses And Foreclosed Properties		449	176	364
Deferred Income Tax Expense (Benefit)		111	21	99
Stock Option Compensation And Amortization Of Restricted Stock Compensation		126	89	67
Gain (Loss) on Sale of Securities, Net		(4)	(21)	15
Gain (Loss) on Sale of Loans and Leases		(428)	(323)	(343)
Net decrease/(increase) in loans held for sale		(1,819)	1,625	(1,567)
Increase (Decrease) in Trading Securities		(342)	67	(1,529)
Net (increase)/decrease in other assets	[1]	(800)	(407)	(45)
Increase (Decrease) in Other Operating Liabilities	[1]	(274)	(166)	(416)
Cash Flows from Investing Activities:
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(11,157)	(5,316)	(9,273)
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities		5,108	5,680	4,707
Proceeds from sales of securities available for sale		197	2,708	2,470
Purchases of securities available for sale		(8,610)	(9,882)	(11,039)
Proceeds from sales of auction rate securities		0	0	59
Proceeds from (payments for) Originations and Purchases of Loans Held-for-investment		(9,032)	(5,897)	(9,843)
Proceeds from sales of loans		1,612	2,127	4,090
Payments for (Proceeds from) Mortgage Servicing Rights		(171)	(117)	(130)
Capital expenditures		(283)	(186)	(147)
Payments related to acquisitions, including contingent consideration		(211)	(30)	(11)
Proceeds from Divestiture of Businesses		0	0	193
Proceeds from Sale of Other Real Estate		233	281	378
Cash Flows from Financing Activities:
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		12,662	(866)	13,399
Net (decrease)/increase in total deposits		10,568	9,263	10,808
Net increase/(decrease) in funds purchased, securities sold under agreements to repurchase, and other short-term borrowings		37	(4,559)	447
Proceeds from Issuance of Long-term Debt		6,705	1,351	2,574
Repayment of long-term debt		(3,231)	(5,684)	(53)
Proceeds from Issuance of Preferred Stock and Preference Stock		0	0	496
Payments for Repurchase of Common Stock		(806)	(679)	(458)
Payments for Repurchase of Warrants		(24)	0	0
Common and preferred dividends paid		(564)	(539)	(409)
Proceeds from the exercise of stock options	[1]	25	17	10
Payments Related to Tax Withholding for Share-based Compensation	[1]	(48)	(36)	(16)
Cash and Cash Equivalents, Period Increase (Decrease)		824	(2,630)	2,966
Cash and cash equivalents		5,599	8,229	5,263
Cash and cash equivalents		6,423	5,599	8,229
Supplemental Disclosures:
Transfer of Loans Held-for-sale to Portfolio Loans		30	741	44
Transfer of Portfolio Loans and Leases to Held-for-sale		360	1,790	3,280
Transfer to Other Real Estate		59	67	148
Non-cash impact of debt acquired by purchaser in leverage lease sale		74	190	177
Amortization Of Deferred Gain On Sale Lease Back Of Premises		43	54	53
Interest Paid		559	523	534
Income Taxes Paid		813	497	380
Proceeds from Income Tax Refunds		(2)	(1)	(219)
non-cash impact of deconsolidated assets		$ 0	$ 0	$ 282

[1] Related to the Company's early adoption of ASU 2016-09, certain prior period amounts have been retrospectively reclassified between operating activities and financing activities. See Note 1, "Significant Accounting Policies," for additional information.