Principal Balances of Off-Balance Sheet Securitized Loans (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Off-balance sheet securitized loans [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	$ 1,296,209		$ 1,300,226
Delinquent loans	32,626		36,684
Net charge-offs (recoveries)	1,088	839
Commercial and Industrial Loans [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	1		1
Delinquent loans	0		0
Net charge-offs (recoveries)	0	0
Commercial Real Estate Other Receivable [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	141,686		207,015
Delinquent loans	8,704		11,515
Net charge-offs (recoveries)	229	143
Commercial Portfolio Segment [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	141,687		207,016
Delinquent loans	8,704		11,515
Net charge-offs (recoveries)	229	143
Total Consumer [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	1,154,522		1,093,210
Delinquent loans	23,922		25,169
Net charge-offs (recoveries)	859	696
Other revolving credit and installment [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	2,362		2,454
Delinquent loans	111		102
Net charge-offs (recoveries)	0	0
Real estate 1-4 family first mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	1,151,474		1,090,755
Delinquent loans	23,789		25,067
Net charge-offs (recoveries)	848	696
Real estate 1-4 family junior lien mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total Loans	686		1
Delinquent loans	22		0
Net charge-offs (recoveries)	$ 11	$ 0