Certain Transfers of Financial Assets and Variable Interest Entities Portfolio Balances and Delinquency Balances Based on 90 days or more Past Due and Net Charge-Offs Related to Managed Portfolio Loans (parenthetical) (Details) (USD $)	3 Months Ended	6 Months Ended		12 Months Ended				3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2013	Jun. 30, 2014 Loans Held For Sale [Member]	Dec. 31, 2013 Loans Held For Sale [Member]	Jun. 30, 2014 Residential Mortgage [Member]	Jun. 30, 2013 Residential Mortgage [Member]	Jun. 30, 2014 Residential Mortgage [Member]		Jun. 30, 2013 Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Cash Flows Between Transferor and Transferee, Receipts on Transferor's Interest in Transferred Financial Assets, Other	$ 12,000,000	$ 7,000,000	$ 19,000,000	$ 10,000,000				$ 7,000,000	$ 11,000,000	$ 10,000,000	[1],[2]	$ 17,000,000
LHFS excluded from managed loans disclosure		4,000,000,000			1,700,000,000
LHFS Accruing90OrMoreDaysPastDueAndNonaccruingExcludedFromManagedLoanDisclosure						$ 1,000,000	$ 17,000,000

[1] Does not include GSE mortgage loan transfers

[2] The transfer activity is related to unconsolidated VIEs.