EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| EMPLOYEE BENEFIT PLANS | ||
| Stock-based compensation costs, pretax | $ 9 | $ 10 |
| 2008 Stock Incentive Plan | ||
| EMPLOYEE BENEFIT PLANS | ||
| Shares available for issuance under the plan (in shares) | 5,400,000 | |
| Shares available assuming maximum performance (in shares) | 4,200,000 | |
| Stock Options | ||
| EMPLOYEE BENEFIT PLANS | ||
| Expiration period from the date of grant | 10 years | |
| Portion of awards vesting on each of the first three anniversary dates of the grant | 33.33% | |
| Vesting period | 3 years | |
| Restricted Stock Units | ||
| EMPLOYEE BENEFIT PLANS | ||
| Contractual right to receive shares of common stock for a stock based award (in shares) | 1 | |
| Portion of awards vesting on each of the first three anniversary dates of the grant | 33.33% | |
| Vesting period | 3 years | |