INVESTMENTS (OFFSETTING FINANCIAL ASSETS) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Offsetting Assets [Line Items]    
Net amounts presented in the balance sheets $ 133 $ 89
Equity Contract    
Offsetting Assets [Line Items]    
Gross amounts recognized 76 28
Gross amounts offset in the balance sheets 20 4
Net amounts presented in the balance sheets 56 24
Collateral Contracts    
Offsetting Assets [Line Items]    
Gross amounts recognized 0  
Gross amounts offset in the balance sheets 58  
Net amounts presented in the balance sheets (58)  
Derivatives Subject to an ISDA Master Agreements    
Offsetting Assets [Line Items]    
Gross amounts recognized 76 28
Gross amounts offset in the balance sheets 78 4
Net amounts presented in the balance sheets (2) 24
Other Financial Instruments    
Offsetting Assets [Line Items]    
Gross amounts recognized 77 65
Gross amounts offset in the balance sheets 0 0
Net amounts presented in the balance sheets 77 65
Other Invested Assets    
Offsetting Assets [Line Items]    
Gross amounts recognized 153 93
Gross amounts offset in the balance sheets 78 4
Net amounts presented in the balance sheets $ 75 $ 89