FAIR VALUE MEASUREMENTS - MATURITIES FOR MARKETABLE SECURITIES (Details) $ in Millions	Mar. 31, 2017 USD ($)
Cost Basis
Due in one year or less	$ 236
Due after one year through five years	1,281
Due after five years through 10 years	12
Due after 10 years	0
Total	1,529
Fair Value
Due after one year through five years	236
Due after one year through five years	1,278
Due after five years through 10 years	13
Due after 10 years	0
Total	$ 1,527