Loan Sale and Servicing Activities and Variable Interest Entities (Consolidated VIEs - Carrying Value) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013	Dec. 31, 2012
Cash and due from banks	$ 4,892	[1]	$ 4,043	[1]	$ 4,051	$ 5,220
Interest-earning deposits with banks	16,876	[1]	12,135	[1]
Loans	200,984	[1],[2]	195,613	[1],[2]	189,775
Allowance for loan and lease losses	(3,453)	[1]	(3,609)	[1]	(3,772)	(4,036)
Equity investments	10,583	[1],[3]	10,560	[1],[3]
Other assets	23,527	[1],[2]	22,552	[1],[2]
Total assets	327,064		320,192
Other borrowed funds	2,711	[1],[2]	3,060	[1],[2]
Accrued expenses	4,753	[1],[3]	4,690	[1],[3]
Other liabilities	4,666	[1]	4,187	[1]
Total liabilities	281,271		276,155
Variable Interest Entity, Primary Beneficiary [Member]
Cash and due from banks	5	[1]	5	[1]
Interest-earning deposits with banks	7	[1]	7	[1]
Loans	1,623	[1]	1,736	[1]
Allowance for loan and lease losses	(50)	[1]	(58)	[1]
Equity investments	420	[1]	582	[1]
Other assets	506	[1]	591	[1]
Total assets	2,511		2,863
Other borrowed funds	383	[1]	414	[1]
Accrued expenses	73	[1]	83	[1]
Other liabilities	157	[1]	252	[1]
Total liabilities	613		749
Variable Interest Entity, Primary Beneficiary [Member] | Credit Card and Other Securitization Trusts [Member]
Loans	1,623		1,736
Allowance for loan and lease losses	(50)		(58)
Other assets	22		25
Total assets	1,595		1,703
Other borrowed funds	170		184
Total liabilities	170		184
Variable Interest Entity, Primary Beneficiary [Member] | Tax Credit Investments
Cash and due from banks	5		5
Interest-earning deposits with banks	7		7
Equity investments	420		582
Other assets	484		566
Total assets	916		1,160
Other borrowed funds	213		230
Accrued expenses	73		83
Other liabilities	157		252
Total liabilities	$ 443		$ 565

[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.

[3] Amounts for 2013 periods have been updated to reflect the first quarter 2014 adoption of Accounting Standards Update (ASU) 2014-01 related to investments in low income housing tax credits.