Asset Quality (Details 12) (USD $)	12 Months Ended
	Dec. 31, 2011 Loan	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Financing Receivable Individually Evaluated for Impairment Specifically Allocated Allowance and Zero Specific Allocation [Line Items]
Individually Evaluated for Impairment Outstanding	$ 388,000,000	$ 621,000,000
Financing Receivable, Impaired [Line Items]
Unpaid impaired financing receivable principal balance	751,000,000	1,213,000,000
Asset Quality (Textual) [Abstract]
Percentage of carrying amount of our commercial nonperforming loans outstanding	62.00%
Percentage of nonperforming loans outstanding face value	70.00%
Percentage of loans held for sale and other nonperforming assets	65.00%
Number of largest nonperforming loans	20
Aggregate carrying amount of largest nonperforming loans	237,000,000
Percentage of total loans on nonperforming status	33.00%
Total loans on nonperforming status from continuing operations		306,000,000
Percentage of total loans on nonperforming status prior year		29.00%
Net reduction to interest income	31,000,000	22,000,000
Additional funds to borrowers related to lending related commitments	0
Interest income recognized on outstanding balances	4,000,000	6,000,000
Total Restructured loans	276,000,000	297,000,000
Addition in restructured loans	182,000,000
Decrease in restructured loans	203,000,000
Trial period HAMP loans included in TDR amounts	4,000,000
Total current loan	48,243,000,000	48,324,000,000
Percent of total current loan	97.00%	97.00%
Total Past Due Loan	1,332,000,000	1,783,000,000
Percent of total past due loans	3.00%	4.00%
Foreign currency translation adjustment	1,000,000	2,000,000	3,000,000
Increase (decrease) in allowance for loan losses	(600,000,000)
Percentage decrease in allowance for loan losses	37.00%
Corresponding allowance for Impairment	51,000,000	58,000,000
Collectively Evaluated for Impairment, Outstanding	49,187,000,000	49,486,000,000
Collectively evaluated for current corresponding allowance	953,000,000,000
Increase (decrease) in liability for credit losses on lending-related commitments	28,000,000
Liability for credit losses on lending-related commitments	45,000,000	73,000,000	121,000,000	54,000,000
Percentage of total allowance for credit losses	2.12%	3.35%
Minimum outstanding impaired commercial loans	2,500,000
Number of days to designate commercial loans will be charged off in full or charged down to the fair value of the underlying collateral payment due period	180 days
Number of days to designate the charge-off policy for most consumer loans taking effect, payment due period	120 days
Number of days to designate home equity and residential mortgage loans to get charged down to the fair value of the underlying collateral payment due period	180 days
Allowance for loan losses	1,004,000,000	1,604,000,000
Allowance for loan and lease losses percentage	2.35%	3.20%
Allowance for loan and lease losses of nonperforming loans percentage	138.10%	150.19%
Impaired Financing Receivable with Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid impaired financing receivable principal balance		$ 366,000,000