SUMMARY OF ACCOUNTING POLICIES - Intangible Assets (Details) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Components of acquired intangible assets
Intangible assets residual value	$ 0
Gross carrying amount	672,000,000	$ 704,000,000
Accumulated Amortization	(356,000,000)	(293,000,000)
Total amortization expense	316,000,000	411,000,000
Intangible amortization	82,000,000	68,000,000	$ 62,000,000
Intangible assets fully amortized and removed	14,000,000
Foreign currency translation adjustments	15,000,000
Estimated future annual amortization expense for acquired intangible assets
2024	70,000,000
2025	63,000,000
2026	43,000,000
2027	36,000,000
2028	27,000,000
Thereafter	77,000,000
Total amortization expense	$ 316,000,000	411,000,000
Customer-related intangibles
Components of acquired intangible assets
Intangible assets, weighted average useful life	6 years 6 months
Gross carrying amount	$ 373,000,000	385,000,000
Accumulated Amortization	(204,000,000)	(157,000,000)
Total amortization expense	169,000,000	228,000,000
Estimated future annual amortization expense for acquired intangible assets
Total amortization expense	$ 169,000,000	228,000,000
Customer-related intangibles | Maximum
Components of acquired intangible assets
Useful life	10 years
Licenses and other intangibles
Components of acquired intangible assets
Intangible assets, weighted average useful life	6 years 1 month 6 days
Gross carrying amount	$ 299,000,000	319,000,000
Accumulated Amortization	(152,000,000)	(136,000,000)
Total amortization expense	147,000,000	183,000,000
Estimated future annual amortization expense for acquired intangible assets
Total amortization expense	$ 147,000,000	$ 183,000,000