Derivative Instruments - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) counterparty	Mar. 31, 2021 USD ($)
Derivative [Line Items]
Number of counterparties with concentration of credit risk | counterparty		9
Maximum exposure to loss		$ 19
Cash Flow Hedging
Derivative [Line Items]
Foreign currency cash flow hedge gain to be reclassified during next 12 months	$ 12	12
Designated as Hedging Instrument | Cash Flow Hedging
Derivative [Line Items]
Pre-tax gain (loss) on derivatives designated for hedge accounting included other comprehensive income	5	15
Pre-tax gain (loss) on derivative instruments	2	3
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Currency Forward Contracts
Derivative [Line Items]
Notational amount of derivative	740	740	$ 546
Designated as Hedging Instrument | Net Investment Hedging | Foreign Currency Denominated Debt
Derivative [Line Items]
Notational amount of derivative	300	300	800
Pre-tax gain (loss) on derivatives designated for hedge accounting included other comprehensive income	5	11
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts
Derivative [Line Items]
Notational amount of derivative	$ 1,500	$ 1,500	$ 2,100