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INVESTMENTS (Details - Pledged Investments) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Investment [Line Items]    
Fair value of securities collateral pledged $ 2,227 $ 1,434
Fair value of amount sold or repledged 46 11
Total carrying values of cash and securities deposited under requirements of regulatory authorities or other insurance-related arrangements 4,900 4,900
Short-term investments held in escrow   523
Bonds available for sale and Short-term investments held in escrow 255  
FHLBs    
Investment [Line Items]    
Fair value of fixed maturities securities available for sale 2,700 3,400
Amount owned by subsidiaries 93 114
Residential loans pledged as collateral 471  
Secured financing    
Investment [Line Items]    
Fair value of fixed maturities securities available for sale 2,911 2,389
Fair value of other bond securities 1,585 1,799
Amounts Borrowed Under Repurchase and Securities Lending Agreements 4,500 4,200
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 1,581  
Securities Lending Agreements, Fair Value of Collateral 2,915 2,389
Amounts Loaned under Reverse Repurchase Agreements 2,200 1,400
Secured financing | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral   1,799
Secured financing | Overnight and continuous    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 44  
Secured financing | Overnight and continuous | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral   0
Secured financing | Up to 30 Days    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 407  
Securities Lending Agreements, Fair Value of Collateral 588  
Secured financing | Up to 30 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral   163
Secured financing | 31 to 90 Days    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 1,130  
Securities Lending Agreements, Fair Value of Collateral 2,327 1,577
Secured financing | 31 to 90 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral   860
Secured financing | 91 to 364 Days    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Securities Lending Agreements, Fair Value of Collateral 0 0
Secured financing | 91 to 364 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral   776
Secured financing | 365 Days or Greater    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | 365 Days or Greater | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral   0
Secured financing | Bonds available for sale | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 26  
Securities Lending Agreements, Fair Value of Collateral 18 50
Secured financing | Bonds available for sale | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 48  
Securities Lending Agreements, Fair Value of Collateral 2,819 2,257
Secured financing | Bonds available for sale | Residential mortgage-backed securities (RMBS)    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral   61
Secured financing | Bonds available for sale | Commercial mortgage-backed securities (CMBS)    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | Overnight and continuous | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | Overnight and continuous | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | Up to 30 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | Up to 30 Days | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 7  
Secured financing | Bonds available for sale | Up to 30 Days | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 13  
Securities Lending Agreements, Fair Value of Collateral 588  
Secured financing | Bonds available for sale | 31 to 90 Days | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 19  
Securities Lending Agreements, Fair Value of Collateral 18 50
Secured financing | Bonds available for sale | 31 to 90 Days | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 35  
Securities Lending Agreements, Fair Value of Collateral 2,231 1,466
Secured financing | Bonds available for sale | 31 to 90 Days | Commercial mortgage-backed securities (CMBS)    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | 91 to 364 Days | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | 91 to 364 Days | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Securities Lending Agreements, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | 91 to 364 Days | Residential mortgage-backed securities (RMBS)    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral   0
Secured financing | Bonds available for sale | 91 to 364 Days | Commercial mortgage-backed securities (CMBS)    
Investment [Line Items]    
Securities Lending Agreements, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | 365 Days or Greater | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Bonds available for sale | 365 Days or Greater | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Other bond securities | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 44  
Secured financing | Other bond securities | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 11 51
Secured financing | Other bond securities | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 1,452 1,748
Secured financing | Other bond securities | Overnight and continuous | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 44  
Secured financing | Other bond securities | Overnight and continuous | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 0
Secured financing | Other bond securities | Overnight and continuous | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 0
Secured financing | Other bond securities | Up to 30 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Other bond securities | Up to 30 Days | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 0
Secured financing | Other bond securities | Up to 30 Days | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 387 163
Secured financing | Other bond securities | 31 to 90 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Other bond securities | 31 to 90 Days | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 11 0
Secured financing | Other bond securities | 31 to 90 Days | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 1,065 860
Secured financing | Other bond securities | 91 to 364 Days | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Other bond securities | 91 to 364 Days | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 51
Secured financing | Other bond securities | 91 to 364 Days | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 725
Secured financing | Other bond securities | 365 Days or Greater | Obligations of states, municipalities and political subdivisions    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0  
Secured financing | Other bond securities | 365 Days or Greater | Non-U.S. governments    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 0
Secured financing | Other bond securities | 365 Days or Greater | Corporate debt    
Investment [Line Items]    
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 0 0
GIAs    
Investment [Line Items]    
Fair value of other bond securities $ 2,000 $ 2,200