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Hedging Activities - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - Derivatives designated for hedge accounting: € in Millions, £ in Millions, $ in Millions, $ in Millions	Mar. 31, 2023 EUR (€)	Mar. 31, 2023 CAD ($)	Mar. 31, 2023 GBP (£)	Mar. 31, 2023 USD ($)	Feb. 28, 2023 GBP (£)	Mar. 31, 2022 EUR (€)	Mar. 31, 2022 CAD ($)	Mar. 31, 2022 GBP (£)	Mar. 31, 2022 USD ($)
Net Investment Hedges | Currency Swap | EUR
Derivatives, Fair Value [Line Items]
Notional amounts of derivative | €	€ 1,100					€ 1,100
Fair Value Hedges | Currency Swap | GBP
Derivatives, Fair Value [Line Items]
Notional amounts of derivative | £			£ 450					£ 450
Fair Value Hedges | Currency Swap | EUR
Derivatives, Fair Value [Line Items]
Notional amounts of derivative	€ 1,100				£ 450	€ 0
Currency Swap | Net Investment Hedges | CAD
Derivatives, Fair Value [Line Items]
Notional amounts of derivative		$ 1,500					$ 500
Currency Swap | Cash Flow Hedging | CAD
Derivatives, Fair Value [Line Items]
Notional amounts of derivative		$ 400					$ 1,678
Interest Rate Swap | Fair Value Hedges | USD
Derivatives, Fair Value [Line Items]
Notional amounts of derivative				$ 1,250					$ 0
Interest Rate Swap | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional amounts of derivative				450
Fixed interest rate swaps | Cash Flow Hedging | USD
Derivatives, Fair Value [Line Items]
Notional amounts of derivative				$ 450					$ 500

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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+ References

No definition available.

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