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Hedging Activities - Narrative (Details) £ in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 CAD ($)	Dec. 31, 2021 GBP (£)	Nov. 04, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2021 EUR (€)	Mar. 31, 2021 CAD ($)	Apr. 27, 2020 USD ($)	Apr. 27, 2020 EUR (€)
Derivative [Line Items]
Unrealized gains (losses) on cash flow hedges	$ (6,000,000)	$ (12,000,000)	$ 2,000,000	$ (36,000,000)
Derivatives designated for hedge accounting
Derivative [Line Items]
Gain (loss) from net investment hedges recorded within other comprehensive income	23,000,000	(84,000,000)	34,000,000	(201,000,000)
Forward contracts to hedge Euro against British Pound cash flows | Derivatives not designated for hedge accounting
Derivative [Line Items]
Notional values of financial instruments	5,000,000		5,000,000						$ 39,000,000
Net Investment Hedging | Derivatives designated for hedge accounting
Derivative [Line Items]
Derivatives used in net investment hedge, gains (losses) gross	(2,000,000)	(45,000,000)	3,000,000	(108,000,000)
Net Investment Hedging | November 2018 Cross Currency Swaps | Derivatives designated for hedge accounting
Derivative [Line Items]
Notional values of financial instruments						$ 500					$ 500
Cash Flow Hedging | Derivatives designated for hedge accounting
Derivative [Line Items]
Unrealized gains (losses) on cash flow hedges	(8,000,000)	$ (14,000,000)	3,000,000	$ (42,000,000)
Cash Flow Hedging | Cross currency swap | Derivatives designated for hedge accounting
Derivative [Line Items]
Notional values of financial instruments	$ 1,800,000,000		$ 1,800,000,000						$ 2,600,000,000
Cash Flow Hedging | Forward starting interest rate swaps | Derivatives designated for hedge accounting
Derivative [Line Items]
Notional values of financial instruments								$ 500,000,000				$ 500,000,000	€ 600,000,000
Euro Denominated Notes | Term Loan | Net Investment Hedging
Derivative [Line Items]
Debt outstanding | €					€ 1,100,000,000					€ 1,700,000,000
British Pound Sterling Denominated Notes | Term Loan
Derivative [Line Items]
Debt outstanding | £							£ 450
2025 Notes | Term Loan
Derivative [Line Items]
Debt instrument term			5 years

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