Pension Benefits - Schedule of Net Periodic Expense for Pension Plans (Details) - Pension Plans, Defined Benefit - Non-U.S. Plans - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	$ 2	$ 5	$ 11
Interest cost on projected benefit obligation	8	7	14
Expected return on assets	(7)	(5)	(19)
Amortization of unrecognized actuarial loss and prior service costs	2	1	3
Curtailment/settlement gain	0	(1)	(5)
Net periodic pension expense	$ 5	$ 7	$ 4