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Fair Value Measurement (Details) (USD $)
12 Months Ended
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Dec. 31, 2010
Level 1 [Member]
Dec. 31, 2009
Level 1 [Member]
Dec. 31, 2010
Level 1 [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Equity Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Equity Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Physical commodities [Member]
Dec. 31, 2009
Level 1 [Member]
Physical commodities [Member]
Dec. 31, 2010
Level 1 [Member]
Others [Member]
Dec. 31, 2009
Level 1 [Member]
Others [Member]
Dec. 31, 2010
Level 1 [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2009
Level 1 [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2010
Level 1 [Member]
Other assets [Member]
Dec. 31, 2009
Level 1 [Member]
Other assets [Member]
Dec. 31, 2010
Level 1 [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Equity Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Commodity Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 1 [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 1 [Member]
Dec. 31, 2009
Level 1 [Member]
Dec. 31, 2010
Level 1 [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Equity Contract [Member]
Dec. 31, 2010
Level 1 [Member]
Commodity Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Dec. 31, 2009
Level 2 [Member]
Dec. 31, 2010
Level 2 [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Equity Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Equity Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Physical commodities [Member]
Dec. 31, 2009
Level 2 [Member]
Physical commodities [Member]
Dec. 31, 2010
Level 2 [Member]
Others [Member]
Dec. 31, 2009
Level 2 [Member]
Others [Member]
Dec. 31, 2010
Level 2 [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2009
Level 2 [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2010
Level 2 [Member]
Other assets [Member]
Dec. 31, 2009
Level 2 [Member]
Other assets [Member]
Dec. 31, 2010
Level 2 [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Equity Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Commodity Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 2 [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 2 [Member]
Dec. 31, 2009
Level 2 [Member]
Dec. 31, 2010
Level 2 [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Equity Contract [Member]
Dec. 31, 2010
Level 2 [Member]
Commodity Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Dec. 31, 2009
Level 3 [Member]
Dec. 31, 2010
Level 3 [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Equity Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Equity Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Physical commodities [Member]
Dec. 31, 2009
Level 3 [Member]
Physical commodities [Member]
Dec. 31, 2010
Level 3 [Member]
Others [Member]
Dec. 31, 2009
Level 3 [Member]
Others [Member]
Dec. 31, 2010
Level 3 [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2009
Level 3 [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2010
Level 3 [Member]
Other assets [Member]
Dec. 31, 2009
Level 3 [Member]
Other assets [Member]
Dec. 31, 2010
Level 3 [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Equity Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Commodity Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Debt Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Debt Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Level 3 [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Level 3 [Member]
Dec. 31, 2009
Level 3 [Member]
Dec. 31, 2010
Level 3 [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Equity Contract [Member]
Dec. 31, 2010
Level 3 [Member]
Commodity Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Dec. 31, 2009
Netting adjustments [Member]
Dec. 31, 2010
Netting adjustments [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Loans [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Equity Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Equity Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Physical commodities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Physical commodities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Others [Member]
Dec. 31, 2009
Netting adjustments [Member]
Others [Member]
Dec. 31, 2010
Netting adjustments [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2009
Netting adjustments [Member]
Limited partnerships - Private equity funds [Member]
Dec. 31, 2010
Netting adjustments [Member]
Other assets [Member]
Dec. 31, 2009
Netting adjustments [Member]
Other assets [Member]
Dec. 31, 2010
Netting adjustments [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Equity Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Commodity Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Debt Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Debt Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Netting adjustments [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Netting adjustments [Member]
Dec. 31, 2009
Netting adjustments [Member]
Dec. 31, 2010
Netting adjustments [Member]
Interest Rate Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Credit Risk Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Foreign Exchange Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Equity Contract [Member]
Dec. 31, 2010
Netting adjustments [Member]
Commodity Contract [Member]
Dec. 31, 2010
Trading assets [Member]
Dec. 31, 2009
Trading assets [Member]
Dec. 31, 2010
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Mortgage-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Mortgage-backed securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
US Government Corporations and Agencies Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
US Government Corporations and Agencies Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2009
Residential mortgage [Member]
Debt Securities [Member]
Dec. 31, 2010
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Residential mortgage [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2009
Commercial and other [Member]
Debt Securities [Member]
Dec. 31, 2010
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Commercial and other [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2009
U.S. Treasury and government agencies [Member]
Debt Securities [Member]
Dec. 31, 2010
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
U.S. Treasury and government agencies [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2009
Obligations of U.S. states and municipalities [Member]
Debt Securities [Member]
Dec. 31, 2010
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Obligations of U.S. states and municipalities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2009
Certificates Of Deposit Bankers Acceptances Commercial Paper [Member]
Debt Securities [Member]
Dec. 31, 2010
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Certificates of Deposit [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Non-U.S. government debt securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Non-U.S. government debt securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Corporate Debt Securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Corporate Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Loans [Member]
Debt Securities [Member]
Dec. 31, 2009
Loans [Member]
Debt Securities [Member]
Dec. 31, 2010
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2009
Asset-backed securities [Member]
Debt Securities [Member]
Dec. 31, 2010
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Collateralized Credit Card Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Collateralized loan obligations [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Other, Debt Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Equity Securities [Member]
Dec. 31, 2009
Equity Securities [Member]
Dec. 31, 2010
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2009
Equity Securities [Member]
Available-for-sale Securities [Member]
Dec. 31, 2010
Physical commodities [Member]
Dec. 31, 2009
Physical commodities [Member]
Dec. 31, 2010
Others [Member]
Dec. 31, 2009
Others [Member]
Dec. 31, 2010
Limited partnerships - Private equity funds [Member]
Dec. 31, 2009
Limited partnerships - Private equity funds [Member]
Dec. 31, 2010
Other assets [Member]
Dec. 31, 2009
Other assets [Member]
Dec. 31, 2010
Interest Rate Contract [Member]
Dec. 31, 2010
Credit Risk Contract [Member]
Dec. 31, 2010
Foreign Exchange Contract [Member]
Dec. 31, 2010
Equity Contract [Member]
Dec. 31, 2010
Commodity Contract [Member]
Dec. 31, 2010
Debt Securities [Member]
Dec. 31, 2009
Debt Securities [Member]
Dec. 31, 2010
Available-for-sale Securities [Member]
Dec. 31, 2009
Available-for-sale Securities [Member]
Assets and liabilities measured at fair value on a recurring basis [Abstract]                                                                                                                                                                                                                                                                                                                                                                                        
Federal funds sold and securities purchased under resale agreements, at fair value$ 20,299,000,000$ 20,536,000,000 $ 0$ 0                                                                          $ 20,299,000,000$ 20,536,000,000                                                                          $ 0$ 0                                                                          $ 0$ 0                                                                                                                                               
Securities borrowed13,961,000,0007,032,000,000 00                                                                          13,961,000,0007,032,000,000                                                                          00                                                                          00                                                                                                                                               
Total debt and equity instruments409,411,000,000330,918,000,000 223,530,000,000156,980,000,00036,813,000,00033,092,000,000  36,813,000,00033,092,000,000  00  00  12,863,000,00013,701,000,000  00  00  31,127,000,00025,684,000,000  00  0000      124,400,000,00075,053,000,000  18,327,000,0009,450,000,00000         80,803,000,00072,477,000,000         152,004,000,000138,772,000,00014,638,000,00011,194,000,000  10,738,000,0008,373,000,000  2,807,000,0002,284,000,000  1,093,000,000537,000,000  9,026,000,0009,559,000,000  11,715,000,0005,681,000,000  3,248,000,0005,419,000,000  38,482,000,00032,487,000,000  42,280,000,00048,754,000,000  21,736,000,00018,330,000,0002,743,000,0001,428,000,000      3,153,000,0003,450,000,000  2,708,000,000586,000,0002,275,000,0001,884,000,000         143,868,000,000132,852,000,000         33,877,000,00035,166,000,0002,930,000,0003,145,000,000  174,000,000260,000,000  687,000,0001,115,000,000  2,069,000,0001,770,000,000  00  2,257,000,0001,971,000,000  00  697,000,000734,000,000  4,946,000,0005,241,000,000  13,144,000,00013,218,000,0007,965,000,0007,975,000,000      1,685,000,0001,956,000,000  00253,000,000926,000,000         31,939,000,00032,284,000,000         0000  00  00  00  00  00  00  00  00  0000      00  0000         00           54,381,000,00047,431,000,000  47,725,000,00041,725,000,000  3,494,000,0003,399,000,000  3,162,000,0002,307,000,000  21,889,000,00023,260,000,000  13,972,000,0007,652,000,000  3,248,000,0005,419,000,000  70,306,000,00058,905,000,000  47,226,000,00053,995,000,000  34,880,000,00031,548,000,00010,708,000,0009,403,000,000      129,238,000,00080,459,000,000  21,035,000,00010,036,000,0002,528,000,0002,810,000,000         256,610,000,000237,613,000,000  
Derivative receivables80,481,000,00080,210,000,000 4,753,000,0002,344,000,000                                                          2,278,000,00001,121,000,00030,000,0001,324,000,000           1,489,340,000,0001,516,490,000,000                                                          1,120,282,000,000111,827,000,000163,114,000,00038,041,000,00056,076,000,000           35,319,000,00046,684,000,000                                                          5,422,000,00017,902,000,0004,236,000,0005,562,000,0002,197,000,000           (1,448,931,000,000)(1,485,308,000,000)                                                          (1,095,427,000,000)(122,004,000,000)(142,613,000,000)(39,429,000,000)(49,458,000,000)                                                                       32,555,000,0007,725,000,00025,858,000,0004,204,000,00010,139,000,000    
Total trading assets489,892,000,000411,128,000,000 228,283,000,000159,324,000,000                                                                          1,641,344,000,0001,655,262,000,000                                                                          69,196,000,00081,850,000,000                                                                          (1,448,931,000,000)(1,485,308,000,000)                                                                                                                                               
Available-for-sale securities316,300,000,000360,400,000,000     104,736,000,000158,957,000,000  104,736,000,000158,957,000,000  00  00  522,000,000405,000,000  31,000,0000  6,000,0000  13,107,000,0005,506,000,000  1,000,0001,000,000    000000  1,998,000,0002,466,000,000               120,401,000,000167,335,000,000           69,862,000,00028,304,000,000  15,490,000,0008,941,000,000  48,969,000,00014,773,000,000  5,403,000,0004,590,000,000  10,826,000,00029,592,000,000  11,272,000,0006,188,000,000  3,641,000,0002,650,000,000  7,670,000,00018,997,000,000  61,793,000,00062,007,000,000    7,608,000,00025,742,000,000128,000,0005,000,0008,777,000,0006,206,000,000  53,000,000146,000,000               181,630,000,000179,837,000,000           256,000,00025,000,000  00  5,000,00025,000,000  251,000,0000  00  256,000,000349,000,000  00  00  00    0013,470,000,00012,144,000,000305,000,000588,000,000  087,000,000               14,287,000,00013,193,000,000           00  00  00  00  00  00  00  00  00    000000  00               00           174,854,000,000187,286,000,000  120,226,000,000167,898,000,000  48,974,000,00014,798,000,000  5,654,000,0004,590,000,000  11,348,000,00029,997,000,000  11,559,000,0006,537,000,000  3,647,000,0002,650,000,000  20,777,000,00024,503,000,000  61,794,000,00062,008,000,000    7,608,000,00025,742,000,00013,598,000,00012,149,000,0009,082,000,0006,794,000,000  2,051,000,0002,699,000,000               316,318,000,000360,365,000,000
Loans1,976,000,0001,364,000,000 00                                                                          510,000,000374,000,000                                                                          1,466,000,000990,000,000                                                                          00                                                                                                                                               
Mortgage servicing rights13,649,000,00015,531,000,0009,403,000,00000                                                                          00                                                                          13,649,000,00015,531,000,000                                                                          00                                                                                                                                               
Other assets18,201,000,00024,177,000,000 5,142,000,0007,406,000,000                                                      49,000,000165,000,0005,093,000,0007,241,000,000                1,018,000,000687,000,000                                                      826,000,000597,000,000192,000,00090,000,000                12,041,000,00016,084,000,000                                                      7,862,000,0006,563,000,0004,179,000,0009,521,000,000                00                                                      0000                                                                        8,737,000,0007,325,000,0009,464,000,00016,852,000,000         
Total assets measured at fair value on a recurring basis874,296,000,000840,133,000,000 353,826,000,000334,065,000,000                                                                          1,858,762,000,0001,863,728,000,000                                                                          110,639,000,000127,648,000,000                                                                          (1,448,931,000,000)(1,485,308,000,000)                                                                                                                                               
Fair Value Assets Measured On Recurring Basis Numeric [Abstract]                                                                                                                                                                                                                                                                                                                                                                                        
Commercial first lien mortgages                                                                                                                                                                                                                                                                                                                   2,600,000,0002,700,000,000                                                                   
Investment valued at net asset value12,100,000,00016,800,000,000 5,900,000,0009,000,000,000                                                                          2,000,000,0003,200,000,000                                                                          4,200,000,0004,600,000,000                                                                                                                                                                                                                           
Fair Value Level Three To Level Two Transfers Amount                                                                                                                                                                                                                                                                                                                   1,200,000,000                                                                    
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]                                                                                                                                                                                                                                                                                                                                                                                        
Deposits4,369,000,0004,455,000,000                                                                      00                                                                          3,736,000,0003,979,000,000                                                                          633,000,000476,000,000                                                                          00                                                                          
Federal funds purchased and securities loaned or sold under repurchase agreements4,060,000,0003,396,000,000                                                                      00                                                                          4,060,000,0003,396,000,000                                                                          00                                                                          00                                                                          
Other borrowed funds9,931,000,0005,637,000,000                                                                      00                                                                          8,959,000,0005,095,000,000                                                                          972,000,000542,000,000                                                                          00                                                                          
Debt and equity instruments76,947,000,00064,946,000,000                                                                      58,468,000,00050,577,000,000                                                                          18,425,000,00014,359,000,000                                                                          54,000,00010,000,000                                                                          00                                                                          
Derivative payables69,219,000,00060,125,000,000                                                                      4,481,000,0002,038,000,0002,625,000,0000972,000,00022,000,000862,000,000                                                                     1,450,343,000,0001,481,813,000,0001,085,233,000,000112,545,000,000158,908,000,00039,046,000,00054,611,000,000                                                                     30,285,000,00035,332,000,0002,586,000,00012,516,000,0004,850,000,0007,331,000,0003,002,000,000                                                                     (1,415,890,000,000)(1,459,058,000,000)(1,070,057,000,000)(119,923,000,000)(139,715,000,000)(35,949,000,000)(50,246,000,000)                                                            20,387,000,0005,138,000,00025,015,000,00010,450,000,0008,229,000,000    
Trading liabilities146,166,000,000125,071,000,000                                                                      62,949,000,00052,615,000,000                                                                          1,468,768,000,0001,496,172,000,000                                                                          30,339,000,00035,342,000,000                                                                          (1,415,890,000,000)(1,459,058,000,000)                                                                          
Accounts payable and other liabilities236,000,000357,000,000                                                                      00                                                                          02,000,000                                                                          236,000,000355,000,000                                                                          00                                                                          
Beneficial interests issued by consolidated VIEs1,495,000,0001,410,000,000                                                                      00                                                                          622,000,000785,000,000                                                                          873,000,000625,000,000                                                                          00                                                                          
Long-term debt38,839,000,00048,972,000,000                                                                      00                                                                          25,795,000,00030,685,000,000                                                                          13,044,000,00018,287,000,000                                                                          00                                                                          
Total liabilities measured at fair value on a recurring basis$ 205,096,000,000$ 189,298,000,000                                                                      $ 62,949,000,000$ 52,615,000,000                                                                          $ 1,511,940,000,000$ 1,540,114,000,000                                                                          $ 46,097,000,000$ 55,627,000,000                                                                          $ (1,415,890,000,000)$ (1,459,058,000,000)