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SUMMARY OF ACCOUNTING POLICIES - Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Accounting Policies [Abstract]
Equity securities, FV-NI	$ 119	$ 123
Equity in earnings (losses) of unconsolidated affiliates	$ (3)	$ 8	$ (4)

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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