Hedging Activities - Summary of Derivative Instruments Gain (Loss) (Details) - Derivatives designated for hedge accounting - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Cross-currency swaps | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Derivatives designated as net investment hedges:	$ (27)	$ (7)	$ (20)	$ (26)
Cross-currency swaps | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow and other hedges:	9	(1)	36	(6)
Foreign currency forwards | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow and other hedges:	(1)	0	(1)	0
Fixed interest rate swaps | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow and other hedges:	$ (1)	$ (85)	$ 15	$ (30)