XML 74 R57.htm IDEA: XBRL DOCUMENT v3.8.0.1
INVESTMENTS - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
investment
Dec. 31, 2016
USD ($)
investment
Dec. 31, 2015
investment
Schedule of Investments [Line Items]      
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, number of investments | investment 3 0 0
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, amortized cost $ 773    
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, aggregate unrealized gain (loss) 47    
Allowance for loan loss 11 $ 3  
Transitional real estate loan commitments 254    
Commercial mortgage loan commitments 13    
Middle market loan program unfunded amount 109 $ 91  
Middle market loan commitments 552    
Limited partnerships investment commitments $ 888    
Percentage that the lending policy requires that the fair value of the securities and/or unrestricted cash received as collateral be of the fair value of the loaned securities 102.00%    
Fair value of debt securities on deposit with regulatory authorities in the United States and Japan $ 21    
Parent Company and Other Business Segments      
Schedule of Investments [Line Items]      
Securities available for sale, fixed maturities, amortized cost 1,300    
Securities available for sale, fixed maturities, fair value $ 1,400