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INVESTMENTS (Details 10) (USD $)
Jun. 30, 2011
Investments in Alternative Investment Funds  
Alternative investment funds, fair value $ 4,142,000,000
Alternative investment funds, unfunded commitments 2,548,000,000
Alternative investment funds, NAV provided by third party asset manager 800,000,000
Hedge funds
 
Investments in Alternative Investment Funds  
Alternative investment funds, fair value 989,000,000
Alternative investment funds, unfunded commitments 9,000,000
Alternative investment funds, redemption frequency (if currently eligible) Monthly, quarterly, annually
Alternative investment funds, redemption notice period 10-95 days
Private equity funds
 
Investments in Alternative Investment Funds  
Alternative investment funds, fair value 2,767,000,000
Alternative investment funds, unfunded commitments 2,376,000,000
Alternative investment funds, carried at cost 250,000,000
Real estate funds
 
Investments in Alternative Investment Funds  
Alternative investment funds, fair value 386,000,000
Alternative investment funds, unfunded commitments $ 163,000,000