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INVESTMENTS (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Investments    
Fair Value $ 47,383,697,000 $ 40,697,848,000
Cost 39,197,800,000 36,647,369,000
Investments pledged as direct collateral 3,300,000,000 2,100,000,000
Private Equity
   
Investments    
Fair Value 37,439,659,000 34,114,623,000
Cost 27,613,803,000 28,336,315,000
Credit
   
Investments    
Fair Value 5,023,253,000 3,396,067,000
Cost 4,841,913,000 3,266,846,000
Real Assets
   
Investments    
Fair Value 2,789,639,000 1,775,683,000
Cost 4,945,958,000 3,861,792,000
Equity Method
   
Investments    
Fair Value 546,422,000 200,831,000
Cost 310,709,000 20,847,000
Other
   
Investments    
Fair Value 1,584,724,000 1,210,644,000
Cost $ 1,485,417,000 $ 1,161,569,000