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INVESTMENTS (Details - Carrying values of other invested assets) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Dec. 31, 2015
Investment [Line Items]          
Other invested assets       $ 25,747 $ 29,794
Hedge Funds          
Investment [Line Items]          
Hedge Fund Fair Value Redemption, Percentage     56.00%    
Hedge Fund Fair Value Redemption, Additional Percentage 10.00% 27.00%      
Alternative investments          
Investment [Line Items]          
Other invested assets       14,227 18,150
Alternative investments | Hedge Funds          
Investment [Line Items]          
Other invested assets       7,800 10,900
Alternative investments | Private equity funds          
Investment [Line Items]          
Other invested assets       5,800 6,500
Alternative investments | Affordable Housing Partnerships          
Investment [Line Items]          
Other invested assets       618 701
Investment real estate          
Investment [Line Items]          
Other invested assets       6,494 6,579
Net of accumulated depreciation on investment in real estate       554 668
Aircraft asset investments          
Investment [Line Items]          
Other invested assets       356 477
Investments in life settlements          
Investment [Line Items]          
Other invested assets       3,577 3,606
All other investments          
Investment [Line Items]          
Other invested assets       $ 1,093 $ 982