Off-Balance Sheet Lending-Related Financial Instruments, Guarantees and Other Commitments - Loan Sales and Mortgage Repurchase Liability (Details 2) (USD $)	3 Months Ended			3 Months Ended				3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2010	Mar. 31, 2012 Mortgage Repurchase Liability [Member]	Mar. 31, 2011 Mortgage Repurchase Liability [Member]	Dec. 31, 2011 Mortgage Repurchase Liability [Member]	Mar. 31, 2012 Mortgage Repurchase Liability [Member] Washington Mutual [Member]	Mar. 31, 2012 Repurchase Make-Whole Settlements [Member]	Mar. 31, 2011 Repurchase Make-Whole Settlements [Member]	Mar. 31, 2012 New Loans Sold During Period [Member]	Mar. 31, 2011 New Loans Sold During Period [Member]	Mar. 31, 2012 Loans Sold With Recourse [Member]	Dec. 31, 2011 Loans Sold With Recourse [Member]	Mar. 31, 2012 Minimum [Member] Mortgage Repurchase Liability [Member]	Mar. 31, 2012 Range Maximum [Member] Mortgage Repurchase Liability [Member]
Loan sales and securitization-related indemnifications
Valuation Allowances and Reserves Probable Recoveries From Third Parties				$ 561,000,000		$ 577,000,000
Loss Contingency, Range of Possible Loss, Portion Not Accrued														0	2,000,000,000
Percentage Of Decline In Home Prices Assumption	43.00%
Percentage Of Decline In Home Prices Assumption Beyond Firms Current Assumptions	8.00%
Summary of changes in mortgage repurchase liability
Allowance for lending-related commitments, Beginning balance at January 1	673,000,000	688,000,000	717,000,000	3,557,000,000	3,285,000,000		32,000,000					142,000,000	148,000,000
Valuation Allowances and Reserves, Deductions				(364,000,000)	(231,000,000)			(186,000,000)	(115,000,000)
Valuation Allowances And Reserves Current Year Provision				323,000,000	420,000,000					27,000,000	13,000,000
Valuation allowances, Ending balance at March 31	750,000,000	688,000,000	717,000,000	3,516,000,000	3,474,000,000		32,000,000					142,000,000	148,000,000
Loans sold with recourse
Indemnification Agreements Loan Sale And Securitization Loans Sold With Recourse Contractual Amount												10,200,000,000	10,400,000,000
Indemnification Agreements, Loan Sale and Securitization, Loans Sold with Recourse: Carrying Value												$ 142,000,000	$ 148,000,000