FAIR VALUE MEASUREMENTS - MATURITIES FOR MARKETABLE SECURITIES (Details) $ in Millions	Sep. 30, 2020 USD ($)
Cost Basis
Due in one year or less	$ 702
Due after one year through five years	1,108
Due after five years through 10 years	54
Total	1,864
Fair Value
Due in one year or less	704
Due after one year through five years	1,139
Due after five years through 10 years	55
Total	$ 1,898