Purchased Credit Impaired Loans by Loan to Value Ratio, Consumer (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Purchased Credit Impaired Loans by Loan to Value [Abstract]
Purchased Credit Impaired Loans, Carrying Value	$ 38,693	$ 41,430
Residential Mortgage [Member]
Purchased Credit Impaired Loans by Loan to Value [Abstract]
0-60%	59,123	62,622
60.01-80%	60,081	60,286
80.01-100%	60,202	63,752
100.01-120%	39,546	42,034
Greater than 120%	39,827	42,871
No LTV/CLTV Available	6,641	5,810
Purchased Credit Impaired Loans	41,496	44,423
Purchased Credit Impaired Loans, Carrying Value	31,677	33,495
Residential Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
Purchased Credit Impaired Loans by Loan to Value [Abstract]
0-60%	1,229	1,696
60.01-80%	4,326	5,555
80.01-100%	10,612	11,950
100.01-120%	9,777	9,641
Greater than 120%	15,423	15,361
No LTV/CLTV Available	129	220
Purchased Credit Impaired Loans	41,496	44,423
Purchased Credit Impaired Loans, Carrying Value	31,677	33,495
Real estate 1-4 family junior lien mortgage [Member] | Purchased Credit-Impaired Loans [Member]
Purchased Credit Impaired Loans by Loan to Value [Abstract]
0-60%	27	43
60.01-80%	53	42
80.01-100%	77	89
100.01-120%	90	116
Greater than 120%	257	314
No LTV/CLTV Available	6	131
Purchased Credit Impaired Loans	510	735
Purchased Credit Impaired Loans, Carrying Value	229	250
Real estate 1-4 family first mortgage [Member] | Purchased Credit-Impaired Loans [Member]
Purchased Credit Impaired Loans by Loan to Value [Abstract]
0-60%	1,202	1,653
60.01-80%	4,273	5,513
80.01-100%	10,535	11,861
100.01-120%	9,687	9,525
Greater than 120%	15,166	15,047
No LTV/CLTV Available	123	89
Purchased Credit Impaired Loans	40,986	43,688
Purchased Credit Impaired Loans, Carrying Value	31,448	33,245
Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by Loan to Value [Abstract]
0-60%	45,661	47,808
60.01-80%	43,602	42,542
80.01-100%	38,982	39,497
100.01-120%	22,913	24,147
Greater than 120%	20,814	24,243
No LTV/CLTV Available	3,730	3,239
Purchased Credit Impaired Loans	40,986	43,688
Purchased Credit Impaired Loans, Carrying Value	31,448	33,245
Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by Loan to Value [Abstract]
0-60%	13,462	14,814
60.01-80%	16,479	17,744
80.01-100%	21,220	24,255
100.01-120%	16,633	17,887
Greater than 120%	19,013	18,628
No LTV/CLTV Available	2,911	2,571
Purchased Credit Impaired Loans	510	735
Purchased Credit Impaired Loans, Carrying Value	$ 229	$ 250