FAIR VALUE MEASUREMENTS - MATURITIES FOR MARKETABLE SECURITIES (Details) $ in Millions	Mar. 31, 2020 USD ($)
Cost Basis
Due in one year or less	$ 167
Due after one year through five years	1,092
Due after five years through 10 years	41
Total	1,300
Fair Value
Due in one year or less	166
Due after one year through five years	1,102
Due after five years through 10 years	41
Total	$ 1,309