Hedging Activities - Schedule of Fair Value of Derivatives (Details) - Derivatives designated for hedge accounting - USD ($) $ in Millions	Sep. 30, 2023	Mar. 31, 2023
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	$ 79	$ 80
Fair value of derivative, liability	52	17
Net Investment Hedges | Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	6	5
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	301	301
Net Investment Hedges | Other non-current assets/liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	73	74
Fair value of derivative, liability	1	2
U.S. Dollar notional amount, asset	2,760	2,760
Floating interest rate swaps | Other non-current assets/liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	0	1
Fair value of derivative, liability	51	15
U.S. Dollar, notional amount, liability	$ 1,250	$ 1,700