Hedging Activities - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - Derivatives designated for hedge accounting € in Millions, £ in Millions, $ in Millions, $ in Millions	Sep. 30, 2023 EUR (€)	Sep. 30, 2023 CAD ($)	Sep. 30, 2023 GBP (£)	Sep. 30, 2023 USD ($)	Jun. 15, 2023 USD ($)	Mar. 31, 2023 EUR (€)	Mar. 31, 2023 CAD ($)	Mar. 31, 2023 GBP (£)	Mar. 31, 2023 USD ($)
Cross-currency swaps | Net Investment Hedges | CAD
Derivatives, Fair Value [Line Items]
Notional		$ 1,500					$ 1,500
Cross-currency swaps | Fair Value Hedges | GBP
Derivatives, Fair Value [Line Items]
Notional | £			£ 450					£ 450
Cross-currency swaps | Fair Value Hedges | EUR
Derivatives, Fair Value [Line Items]
Notional | €	€ 1,100					€ 1,100
Cross-currency swaps | Cash Flow Hedges | CAD
Derivatives, Fair Value [Line Items]
Notional		$ 400					$ 400
Floating interest rate swaps | Fair Value Hedges | USD
Derivatives, Fair Value [Line Items]
Notional				$ 1,250					$ 1,250
Floating interest rate swaps | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Notional					$ 500
Fixed interest rate swaps | Cash Flow Hedges | USD
Derivatives, Fair Value [Line Items]
Notional				$ 0					$ 450