Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest Income
Interest and fees on loans		$ 4,939	$ 4,506	$ 4,617
Interest and fees on loans held for sale		92	82	78
Interest and Dividend Income, Securities, Available-for-sale		651	593	613
Trading account interest and other		96	84	76
Total interest income		5,778	5,265	5,384
Interest Expense
Interest on deposits		259	219	235
Interest Expense, Long-term Debt		260	252	270
Interest on other borrowings		38	30	39
Total interest expense		557	501	544
Net, interest income		5,221	4,764	4,840
Provision for Loan, Lease, and Other Losses	[1]	444	165	342
Interest Income (Expense), after Provision for Loan Loss		4,777	4,599	4,498
Noninterest Income
Service charges on deposit accounts		630	622	645
Fees and Commissions, Other		380	377	368
Fees and Commissions, Credit and Debit Cards		327	329	320
Investment Banking Revenue		494	461	404
Trading Gain (Loss)		211	181	182
Fees and Commissions, Fiduciary and Trust Activities		304	334	423
Investment Advisory, Management and Administrative Fees		281	300	297
Fees and Commissions, Mortgage Banking		366	270	201
Servicing Fees, Net		(189)	(169)	(196)
Gain (Loss) on Disposition of Business		0	0	105
Gain (Loss) on Sale of Securities, Net		4	21	(15)
Noninterest Income, Other Operating Income		197	204	197
Total noninterest income		3,383	3,268	3,323
Noninterest Expense
Employee compensation		2,698	2,576	2,576
Other Labor-related Expenses		373	366	386
Outside processing and software		834	815	741
Net occupancy expense		349	341	340
Equipment Expense		170	164	169
Marketing and Advertising Expense		172	151	134
Federal Deposit Insurance Corporation Premium Expense		173	139	142
Operating losses		108	56	441
Professional Fees		93	73	71
Credit and collection services		66	71	91
Amortization		49	40	25
Other Noninterest Expense		383	368	427
Noninterest Expense		5,468	5,160	5,543
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		2,692	2,707	2,278
Income Tax Expense (Benefit)		805	764	493
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,887	1,943	1,785
Net Income (Loss) Attributable to Noncontrolling Interest		9	10	11
Net Income (Loss) Attributable to Parent		1,878	1,933	1,774
Net Income (Loss) Available to Common Stockholders, Basic		$ 1,811	$ 1,863	$ 1,722
Weighted Average Number of Shares Outstanding, Basic		498,638	514,844	527,500
Weighted Average Number of Shares Outstanding, Diluted		503,466	520,586	533,391
Common Stock, Dividends, Per Share, Declared		$ 1.00	$ 0.92	$ 0.70
Earnings Per Share, Basic		3.63	3.62	3.26
Earnings Per Share, Diluted		$ 3.60	$ 3.58	$ 3.23

[1] Provision for credit losses represents net charge-offs by segment combined with an allocation to the segments for the provision attributable to quarterly changes in the ALLL and unfunded commitment reserve balances.