Consolidated Statements of Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Statement [Abstract]
Gains (Losses) on Sales of Other Real Estate	$ (4)		$ 4		$ 140
Gains (Losses) on Extinguishment of Debt	0		0		16
Interest Income
Interest and fees on loans	4,617		4,633		5,035
Interest and fees on loans held for sale	78		107		112
Interest and Dividend Income, Securities, Available-for-sale	613		579		655
Trading account interest and other	76		69		65
Total interest income	5,384		5,388		5,867
Interest Expense
Interest on deposits	235		291		429
Interest Expense, Long-term Debt	270		210		299
Interest on other borrowings	39		34		37
Total interest expense	544		535		765
Net, interest income	4,840		4,853		5,102
Provision for Loan, Lease, and Other Losses	342	[1]	553	[1]	1,395
Interest Income (Expense), after Provision for Loan Loss	4,498		4,300		3,707
Noninterest Income
Service charges on deposit accounts	645		657		676
Fees and Commissions, Other	368		369		402
Fees and Commissions, Credit and Debit Cards	320		310		316
Fees and Commissions, Fiduciary and Trust Activities	423		518		512
Investment Advisory, Management and Administrative Fees	297		267		241
Investment Banking Revenue	404		356		342
Trading Gain (Loss)	182		182		211
Servicing Fees, Net	196		87		260
Fees and Commissions, Mortgage Banking	201		314		343
Gain (Loss) on Disposition of Business	105		0		0
Gain (Loss) on Sale of Securities, Net	(15)		2		1,974
Noninterest Income, Other Operating Income	197		152		96
Total noninterest income	3,323		3,214		5,373
Noninterest Expense
Employee compensation	2,576		2,488		2,603
Other Labor-related Expenses	386		413		474
Outside processing and software	741		746		710
Net occupancy expense	340		348		359
Equipment Expense	169		181		188
Federal Deposit Insurance Corporation Premium Expense	142		181		233
Marketing and Advertising Expense	134		135		184
Professional Fees	72		73		165
Credit and collection services	91		264		239
Operating losses	441		503		277
Amortization of Intangible Assets and Impairment of Goodwill	25		23		46
Other Noninterest Expense	(430)	[2]	(472)	[2]	(650)	[2]
Noninterest Expense	5,543		5,831		6,284
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	2,278		1,683		2,796
Income Tax Expense (Benefit)	493	[2]	322	[2]	812	[2]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,785		1,361		1,984
Net Income (Loss) Attributable to Noncontrolling Interest	11		17		26
Net Income (Loss) Attributable to Parent	1,774		1,344		1,958
Net Income (Loss) Available to Common Stockholders, Basic	$ 1,722		$ 1,297		$ 1,931
Earnings Per Share, Diluted	$ 3.23		$ 2.41		$ 3.59
Earnings Per Share, Basic	$ 3.26		$ 2.43		$ 3.62
Common Stock, Dividends, Per Share, Declared	$ 0.70		$ 0.35		$ 0.20
Weighted Average Number of Shares Outstanding, Diluted	533,391		539,093		538,061
Weighted Average Number of Shares Outstanding, Basic	527,500		534,283		534,149

[1] 2 Provision for credit losses represents net charge-offs by segment combined with an allocation to the segments of the provision attributable to quarterly changes in the ALLL and unfunded commitment reserve balances.

[2] 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. Prior to 2014, these amounts were recognized in other noninterest expense.