Branch Assets and Liabilities Held For Sale (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets and liabilities classified as held for sale related to agreement to sell certain retail branches
Loan held for sale for branch	$ 531	$ 2,495
Other branch assets held for sale:
Properties and equipment, net	14	42
Other assets	9
Goodwill allocated to retail branch disposal group	94	398
Total other branch assets held for sale	117	440
Total branch assets held for sale	648	2,935
Deposits held for sale	3,633	15,144
Other branch liabilities held for sale	2	11
Total branch liabilities held for sale	$ 3,635	$ 15,155