FAIR VALUE MEASUREMENTS - MATURITIES FOR MARKETABLE SECURITIES (Details) $ in Millions	Jun. 30, 2019 USD ($)
Cost Basis
Due in one year or less	$ 298
Due after one year through five years	1,065
Due after five years through 10 years	4
Total	1,367
Fair Value
Due in one year or less	299
Due after one year through five years	1,080
Due after five years through 10 years	4
Total	$ 1,383