Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Interest Income
Interest and fees on loans		$ 1,203	$ 1,091
Interest and fees on loans held for sale		19	22
Interest and Dividend Income, Securities, Available-for-sale		163	140
Trading account interest and other		26	19
Total interest income		1,411	1,272
Interest Expense
Interest on deposits		59	56
Interest Expense, Long-term Debt		59	68
Interest on other borrowings		11	8
Total interest expense		129	132
Net, interest income		1,282	1,140
Provision for Loan, Lease, and Other Losses	[1]	101	55
Interest Income (Expense), after Provision for Loan Loss		1,181	1,085
Noninterest Income
Service charges on deposit accounts		153	151
Fees and Commissions, Other		93	89
Fees and Commissions, Credit and Debit Cards		78	80
Investment Banking Revenue		98	97
Trading Gain (Loss)		55	55
Fees and Commissions, Fiduciary and Trust Activities		75	84
Investment Advisory, Management and Administrative Fees		69	72
Servicing Fees, Net		62	43
Fees and Commissions, Mortgage Banking		60	83
Gain (Loss) on Sale of Securities, Net		0	0
Noninterest Income, Other Operating Income		38	63
Total noninterest income		781	817
Noninterest Expense
Employee compensation		639	633
Other Labor-related Expenses		135	138
Outside processing and software		198	189
Net occupancy expense		85	84
Marketing and Advertising Expense		44	27
Equipment Expense		40	40
Federal Deposit Insurance Corporation Premium Expense		36	37
Operating losses		24	14
Amortization		10	7
Other Noninterest Expense		(107)	(111)
Noninterest Expense		1,318	1,280
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		644	622
Income Tax Expense (Benefit)		195	191
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		449	431
Net Income (Loss) Attributable to Noncontrolling Interest		2	2
Net Income (Loss) Attributable to Parent		447	429
Net Income (Loss) Available to Common Stockholders, Basic		$ 430	$ 411
Earnings Per Share, Diluted		$ 0.84	$ 0.78
Earnings Per Share, Basic		0.85	0.79
Common Stock, Dividends, Per Share, Declared		$ 0.24	$ 0.20
Weighted Average Number of Shares Outstanding, Diluted		510	527
Weighted Average Number of Shares Outstanding, Basic		505	521
Amortization Method Qualified Affordable Housing Project Investments, Amortization		$ 19	$ 14

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