XML 65 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
FAIR VALUE DISCLOSURES - CARRYING VALUES AND FAIR VALUES OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investments classified as Level 3 $ 6 $ 31
Financial Instruments [Abstract]    
Mortgage loans on real estate 17 17
Policy loans 185 176
Policyholders' liabilities: Investment contracts 2,631 2,377
Reported Value Measurement    
Financial Instruments [Abstract]    
Mortgage loans on real estate 17 17
Policy loans 185 176
Policyholders' liabilities: Investment contracts 153 168
Estimate of Fair Value Measurement    
Financial Instruments [Abstract]    
Mortgage loans on real estate   16
Policy loans   210
Policyholders' liabilities: Investment contracts 156 170
Estimate of Fair Value Measurement | Level 1    
Financial Instruments [Abstract]    
Mortgage loans on real estate 0 0
Policy loans 0 0
Policyholders' liabilities: Investment contracts 0 0
Estimate of Fair Value Measurement | Level 2    
Financial Instruments [Abstract]    
Mortgage loans on real estate 0 0
Policy loans 0 0
Policyholders' liabilities: Investment contracts 0 0
Estimate of Fair Value Measurement | Level 3    
Financial Instruments [Abstract]    
Mortgage loans on real estate 17 16
Policy loans 224 210
Policyholders' liabilities: Investment contracts $ 156 $ 170