REVENUE RECOGNITION - Reconciliation of Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Reconciliation of Contract Balances
Accounts receivable (net of allowances for credit losses of $28 at September 30, 2023 and $32 at March 31, 2023)	$ 1,663		$ 1,663		$ 1,523
Contract assets	35		35		30
Deferred income (current)	790		790		820
Deferred income (noncurrent)	316		316		362
Accounts receivable, allowances	28		28		32
Unbilled receivable	458		458		$ 384
Revenue recognized that was included in deferred income at the beginning of the period	$ 176	$ 184	$ 360	$ 367