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Derivative Instruments - Credit and Liquidity Risk and Related Contingent Features (Details 3) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Credit and liquidity risk, credit-related contingent features    
Net derivative payables containing collateral or termination feature, Fair Value $ 20,134 $ 16,937
Net derivative payables posted collateral 18,907 11,429
Current credit risk of derivative receivables    
Fair value related to derivative receivables 1,642,154 1,884,499
Netting adjustment offsetting receivables (1,483,509) (1,710,523)
Netting adjustment cash collateral received (73,635) (81,499)
Carrying value of derivative trading assets 85,010 92,477
Fair value related to derivative payables 1,613,528 1,837,256
Netting adjustment offsetting payables (1,483,509) (1,710,523)
Netting adjustment cash collateral paid (55,252) (51,756)
Carrying value of derivative trading liabilities 74,767 74,977
Total collateral for derivative transactions    
Netting adjustment cash collateral received (73,635) (81,499)
Other cash and liquid security collateral held 18,401 21,807
Additional collateral and security collateral held 19,616 17,613
Total collateral held for derivative transations 111,652 120,919
Netting adjustment cash collateral paid (55,252) (51,756)
Other cash and liquid security collateral pledged 18,680 19,439
Additional collateral and security collateral pledged 10,643 10,824
Total collateral pledged for derivative transactions 84,575 82,019
Single-notch ratings downgrade
   
Credit and liquidity risk, credit-related contingent features    
Additional collateral to be posted by the Firm as the impact of ratings downgrades 971 1,460
Additional assets required to settle trades as the impact of ratings downgrades 1,142 1,054
Two-notch ratings downgrade
   
Credit and liquidity risk, credit-related contingent features    
Additional collateral to be posted by the Firm as the impact of ratings downgrades 1,696 2,054
Additional assets required to settle trades as the impact of ratings downgrades $ 1,780 $ 1,923