Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Income
Interest and fees on loans		$ 4,506	$ 4,617	$ 4,633
Interest and fees on loans held for sale		82	78	107
Interest and Dividend Income, Securities, Available-for-sale		593	613	579
Trading account interest and other		84	76	69
Total interest income		5,265	5,384	5,388
Interest Expense
Interest on deposits		219	235	291
Interest Expense, Long-term Debt		252	270	210
Interest on other borrowings		30	39	34
Total interest expense		501	544	535
Net, interest income		4,764	4,840	4,853
Provision for Loan, Lease, and Other Losses		165	342	553
Interest Income (Expense), after Provision for Loan Loss		4,599	4,498	4,300
Noninterest Income
Service charges on deposit accounts		622	645	657
Fees and Commissions, Other		377	368	369
Fees and Commissions, Credit and Debit Cards		329	320	310
Investment Banking Revenue		461	404	356
Trading Gain (Loss)		181	182	182
Fees and Commissions, Fiduciary and Trust Activities		334	423	518
Investment Advisory, Management and Administrative Fees		300	297	267
Fees and Commissions, Mortgage Banking		270	201	314
Servicing Fees, Net		169	196	87
Gain (Loss) on Disposition of Business		0	105	0
Gain (Loss) on Sale of Securities, Net		21	(15)	2
Noninterest Income, Other Operating Income		204	197	152
Total noninterest income		3,268	3,323	3,214
Noninterest Expense
Employee compensation		2,576	2,576	2,488
Other Labor-related Expenses		366	386	413
Outside processing and software		815	741	746
Net occupancy expense		341	340	348
Equipment Expense		164	169	181
Marketing and Advertising Expense		151	134	135
Federal Deposit Insurance Corporation Premium Expense		139	142	181
Credit and collection services		71	91	264
Operating losses		56	441	503
Amortization		40	25	23
Other Noninterest Expense	[1]	(441)	(498)	(549)
Noninterest Expense		5,160	5,543	5,831
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		2,707	2,278	1,683
Income Tax Expense (Benefit)	[1],[2]	764	493	322
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,943	1,785	1,361
Net Income (Loss) Attributable to Noncontrolling Interest		10	11	17
Net Income (Loss) Attributable to Parent		1,933	1,774	1,344
Net Income (Loss) Available to Common Stockholders, Basic		$ 1,863	$ 1,722	$ 1,297
Earnings Per Share, Diluted		$ 3.58	$ 3.23	$ 2.41
Earnings Per Share, Basic		3.62	3.26	2.43
Common Stock, Dividends, Per Share, Declared		$ 0.92	$ 0.70	$ 0.35
Weighted Average Number of Shares Outstanding, Diluted		520,586	533,391	539,093
Weighted Average Number of Shares Outstanding, Basic		514,844	527,500	534,283
Amortization Method Qualified Affordable Housing Project Investments, Amortization		$ 66	$ 61	$ 49

[1] Amortization expense related to qualified affordable housing investment costs is recognized in provision for income taxes for each of the periods presented as allowed by an accounting standard adopted in 2014. Accordingly, $49 million of related amortization expense for the year ended December 31, 2013 was reclassified from other noninterest expense to provision for income taxes.

[2] Amortization expense related to qualified affordable housing investment costs is recognized in the provision for income taxes for each of the periods presented as allowed by an accounting standard adopted in 2014. Prior to 2014, these amounts were recognized in other noninterest expense.