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INVESTMENTS (TEXTUAL) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Debt securities exposure in single issuer greater than stated percentage of total investments 0.30%   0.30%    
Available-for-sale securities, amortized cost basis $ 34,042   $ 34,042   $ 31,235
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 143   143   194
Carrying value of fixed maturities non-income producing 5   5    
Investment expenses 14 $ 14 30 $ 26  
Trading securities, Cost 7,756   7,756   6,866
Trading securities, at fair value 7,843   7,843   6,805
Separate account equity investment carrying value 73   73   82
Separate account equity investment cost 59   59   72
Equity Securities, Carrying Value 80   80   32
Equity Securities, Amortized Cost 80   80   34
Other Than Investment Grade          
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Available-for-sale securities, amortized cost $ 1,481   $ 1,481   $ 1,310
Percentage of available for sale securities 4.40%   4.40%   4.20%
Subprime residential mortgage loans          
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Other investments and securities, at cost $ 7   $ 7   $ 7
Alt residential mortgage loans          
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Other investments and securities, at cost 6   6   6
Public corporate          
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Debt securities exposure in single issuer of total investments 163   163   157
Available-for-sale securities, amortized cost basis 12,983   12,983   12,890
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 16   16   73
Fixed Maturities          
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Available-for-sale securities, amortized cost basis $ 33,962   33,962   31,201
Fixed Maturities | Other Than Investment Grade          
Investments In Fixed Maturity Securities Other Disclosure [Abstract]          
Gross Unrealized Losses     $ 58   $ 97