Asset Quality (Details Textual) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012 Loan	Jun. 30, 2011	Dec. 31, 2011	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2010
Asset Quality (Textual) [Abstract]
Performing home equity second liens including nonperforming loans	$ 36,000,000
Number of days subordinate to first liens	120 days
Percentage of carrying amount of our commercial nonperforming loans outstanding	59.00%
Percentage of nonperforming loans outstanding face value	70.00%
Percentage of loans held for sale and other nonperforming assets	64.00%
Number of largest nonperforming loans	20
Aggregate carrying amount of largest nonperforming loans	220,000,000
Percentage of total loans on nonperforming status	34.00%
Total loans on nonperforming status from continuing operations		276,000,000
Percentage of total loans on nonperforming status prior year	33.00%
Net reduction to interest income	12,000,000		31,000,000
Interest income recognized on outstanding balances	2,000,000	2,000,000
Total Restructured loans	274,000,000	252,000,000	276,000,000
Addition in restructured loans	109,000,000
Restructured loans partially in payments and charge-offs	111,000,000
Trial period HAMP loans included in TDR amounts	4,000,000
Total current loan	48,455,000,000	46,415,000,000
Additional funds to borrowers related to lending related commitments	45,000,000	45,000,000	25,000,000
Percent of total current loan	98.00%
Total Past Due Loan	1,150,000,000	1,425,000,000
Percent of total past due loans	2.00%
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
ALLL	888,000,000	1,230,000,000	1,004,000,000
ALLL percentage	1.79%	2.57%
ALLL of non performing loans percentage	135.16%	146.08%
Foreign currency translation adjustment	(1,000,000)	1,000,000
Increase (decrease) in allowance for loan losses	(342,000,000)
Percentage decrease in allowance for loan losses	28.00%
Individually Evaluated for Impairment Allowance	48,000,000	46,000,000
Individually Evaluated for Impairment corresponding allowance	411,000,000	488,000,000
Collectively Evaluated for Impairment, Outstanding	49,194,000,000	47,352,000,000
Collectively evaluated for current corresponding allowance	840,000,000
Loans carried at fair value	2,800,000,000
Increase (decrease) in liability for credit losses on lending-related commitments		6,000,000
Liability for credit losses on lending-related commitments	$ 51,000,000	$ 57,000,000	$ 45,000,000	$ 45,000,000	$ 69,000,000	$ 73,000,000
Percentage of total allowance for credit losses	1.89%	2.69%