EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
EMPLOYEE BENEFIT PLANS
Shares available for issuance under the plan (in shares)	8,000,000.0
Shares available assuming maximum performance (in shares)	7,700,000
Stock-based compensation costs, pretax	$ 23	$ 20
Stock Options
EMPLOYEE BENEFIT PLANS
Expiration period from the date of grant	10 years
Vesting period	3 years
Portion of awards vesting on each of the first three anniversary dates of the grant	33.33%
Restricted Stock Units
EMPLOYEE BENEFIT PLANS
Contractual right to receive shares of common stock for a stock based award (in shares)	1
Vesting period	3 years
Portion of awards vesting on each of the first three anniversary dates of the grant	33.33%