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Pension Benefits - Schedule of Other Changes in Accumulated Other Comprehensive Income (Details) - Non-U.S. Plans - Pension Plans, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss	$ 9	$ 9	$ (7)
Prior service cost	2	0	1
Amortization of:
Net actuarial loss	(57)	(2)	(9)
Prior service credit	0	0	2
Foreign exchange impact and other	0	1	(5)
Total recognized in other comprehensive (income) loss	$ (46)	$ 8	$ (18)

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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