TRANSACTIONS WITH FORMER PARENT - Related Party Revenue and Purchases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		17 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Aug. 11, 2022
Related Party Transaction [Line Items]
Revenues	$ 3,936	$ 4,303	$ 12,202	$ 12,771
Cost of services	3,184	3,596	10,055	10,886
Payment for purchase of hardware from IBM			449	711
Related Party
Related Party Transaction [Line Items]
Revenues				287
Cost of services				1,382
IBM
Related Party Transaction [Line Items]
Ownership interest transferred						19.90%
IBM | Hardware, software and services
Related Party Transaction [Line Items]
Payment for purchase of hardware from IBM				89
Due from related party	265	265	265	$ 265	$ 265
Upgraded hardware period				2 years
Purchases from related party	$ 71	$ 21	$ 181	$ 41	$ 265
Estimated useful lives (in years)	5 years		5 years		5 years
IBM | Related Party
Related Party Transaction [Line Items]
Revenues				287
Cost of services				$ 1,382