WORKFORCE REBALANCING AND SITE-RATIONALIZATION CHARGES - Rollforward (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	21 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2023	Mar. 31, 2023
RESTRUCTURING
Balance at beginning of period		$ 58
Charges	$ 33	140	$ 275
Cash payments		(138)
Non-cash adjustments		(21)
Balance at end of period	39	39	39
Workforce Rebalancing Charges
RESTRUCTURING
Balance at beginning of period		55
Charges		115
Cash payments		(130)
Non-cash adjustments		(1)
Balance at end of period	39	39	39
Historic workforce rebalancing liabilities	$ 29	29	$ 29	$ 42
Liabilities Related to Ceasing to Use Leased Assets
RESTRUCTURING
Charges		10
Non-cash adjustments		(10)
Liabilities Related to Lease Terminations
RESTRUCTURING
Balance at beginning of period		3
Charges		(1)
Cash payments		(2)
Liabilities Related to Ceasing to Use Fixed Assets
RESTRUCTURING
Charges		16
Cash payments		(6)
Non-cash adjustments		(10)
Workforce Rebalancing Liabilities Inherited from Former Parent
RESTRUCTURING
Cash payments		(11)
Non-cash adjustments		$ 1