FAIR VALUE DISCLOSURES - CARRYING VALUES AND FAIR VALUES OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Investments classified as Level 3 | $ 31 | $ 39 |
| Financial Instruments [Abstract] | ||
| Mortgage loans on real estate | 17 | 0 |
| Policyholders' liabilities: Investment contracts | 2,403 | 2,158 |
| Policy loans | 176 | 159 |
| Reported Value Measurement | ||
| Financial Instruments [Abstract] | ||
| Mortgage loans on real estate | 17 | |
| Policyholders' liabilities: Investment contracts | 168 | 177 |
| Policy loans | 176 | 159 |
| Estimate of Fair Value Measurement | ||
| Financial Instruments [Abstract] | ||
| Mortgage loans on real estate | 16 | |
| Policyholders' liabilities: Investment contracts | 170 | 184 |
| Policy loans | 210 | 189 |
| Estimate of Fair Value Measurement | Level 3 | ||
| Financial Instruments [Abstract] | ||
| Mortgage loans on real estate | 16 | |
| Policyholders' liabilities: Investment contracts | 170 | 184 |
| Policy loans | $ 210 | $ 189 |