Loan Sale and Servicing Activities and Variable Interest Entities (Consolidated VIEs) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Aggregate Assets	$ 115,188		$ 125,671
Aggregate Liabilities	111,603		122,660
Tax Credit Investments And Other [Member]
Aggregate Assets	6,011	[1]	5,395	[1]
Aggregate Liabilities	2,426	[1]	2,384	[1]
Variable Interest Entity, Primary Beneficiary [Member] | Market Street [Member]
Aggregate Assets	7,895	[2]	5,490	[2]
Aggregate Liabilities	7,896	[2]	5,491	[2]
Variable Interest Entity, Primary Beneficiary [Member] | Credit Card Securitization Trust [Member]
Aggregate Assets	1,725	[2]	2,175	[2]
Aggregate Liabilities	18	[2]	494	[2]
Variable Interest Entity, Primary Beneficiary [Member] | Tax Credit Investments And Other [Member]
Aggregate Assets	2,512	[2]	2,503	[2]
Aggregate Liabilities	$ 730	[2]	$ 723	[2]

[1] Aggregate assets and aggregate liabilities are based on limited availability of financial information associated with certain acquired partnerships.

[2] Amounts in this table differ from total assets and liabilities in the preceding "Consolidated VIEs - Carrying Value" table due to the elimination of intercompanyassets and liabilities in the preceding table.