Loan Sale and Servicing Activities and Variable Interest Entities (Consolidated VIEs - Carrying Value) (Details) - USD ($)		Jun. 30, 2015		Dec. 31, 2014		Jun. 30, 2014		Dec. 31, 2013
Cash and due from banks		$ 4,412,000,000	[1]	$ 4,360,000,000	[1]	$ 4,892,000,000		$ 4,043,000,000
Interest-earning deposits with banks	[1]	33,969,000,000		31,779,000,000
Total Loans		205,153,000,000	[1],[2]	204,817,000,000	[1],[2]	200,984,000,000
Allowance for loan and lease losses		(3,272,000,000)	[1]	(3,331,000,000)	[1]	$ (3,453,000,000)	[1]	$ (3,609,000,000)
Equity investments	[1]	10,531,000,000		10,728,000,000
Other assets	[1],[2]	24,032,000,000		23,482,000,000
Total assets		353,945,000,000		345,072,000,000
Other borrowed funds	[1],[2]	3,287,000,000		3,357,000,000
Accrued expenses	[1]	5,031,000,000		5,187,000,000
Other liabilities	[1]	4,776,000,000		4,550,000,000
Total liabilities		308,033,000,000		298,998,000,000
Variable Interest Entity, Primary Beneficiary [Member]
Cash and due from banks	[1]	5,000,000		6,000,000
Interest-earning deposits with banks	[1]	5,000,000		6,000,000
Total Loans	[1]	1,463,000,000		1,606,000,000
Allowance for loan and lease losses	[1]	(44,000,000)		(50,000,000)
Equity investments	[1]	256,000,000		492,000,000
Other assets	[1]	440,000,000		483,000,000
Total assets		2,125,000,000		2,543,000,000
Other borrowed funds	[1]	311,000,000		347,000,000
Accrued expenses	[1]	63,000,000		70,000,000
Other liabilities	[1]	136,000,000		206,000,000
Total liabilities		510,000,000		623,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Credit Card and Other Securitization Trusts [Member]
Total Loans		1,457,000,000		1,606,000,000
Allowance for loan and lease losses		(44,000,000)		(50,000,000)
Other assets		20,000,000		31,000,000
Total assets		1,433,000,000		1,587,000,000
Other borrowed funds		154,000,000		166,000,000
Total liabilities		154,000,000		166,000,000
Variable Interest Entity, Primary Beneficiary [Member] | Tax Credit Investments
Cash and due from banks		5,000,000		6,000,000
Interest-earning deposits with banks		5,000,000		6,000,000
Total Loans		6,000,000
Equity investments		256,000,000		492,000,000
Other assets		420,000,000		452,000,000
Total assets		692,000,000		956,000,000
Other borrowed funds		157,000,000		181,000,000
Accrued expenses		63,000,000		70,000,000
Other liabilities		136,000,000		206,000,000
Total liabilities		$ 356,000,000		$ 457,000,000

[1] Amounts represent the assets or liabilities of consolidated variable interest entities (VIEs).

[2] Amounts represent items for which we have elected the fair value option.