REVENUE RECOGNITION - Deferred Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024
Deferred Contract Costs
Deferred costs	$ 2,045		$ 2,045		$ 2,000
Deferred costs, current	994		994		1,081
Deferred costs, noncurrent	1,052		1,052		920
Total deferred costs amortized	435	$ 449	852	$ 912
Amortization of deferred costs	98		205	281
Deferred transition costs
Deferred Contract Costs
Deferred costs	734		734		753
Total deferred costs amortized	75	88	147	173
Prepaid software costs
Deferred Contract Costs
Deferred costs	810		810		770
Total deferred costs amortized	262	218	500	459
Capitalized contract costs
Deferred Contract Costs
Total deferred costs amortized		$ 143		$ 281
Capitalized costs to fulfill contracts
Deferred Contract Costs
Deferred costs	220		220		212
Capitalized costs to obtain contracts
Deferred Contract Costs
Deferred costs	$ 282		$ 282		$ 265
Minimum
Deferred Contract Costs
Term of contract with customer			3 years
Maximum
Deferred Contract Costs
Term of contract with customer			6 years