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Hedging Activities - Narrative (Details) € in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jul. 31, 2026 CAD ($)	Jul. 31, 2026 EUR (€)	Jun. 30, 2026 CAD ($)	Jun. 30, 2026 EUR (€)	Mar. 31, 2026 CAD ($)	Mar. 31, 2026 EUR (€)
Derivative [Line Items]
Gains (losses) related to cash flow hedges	$ 0	$ 0
Floating interest rate swaps | Cash Flow Hedges | Derivatives designated for hedge accounting
Derivative [Line Items]
Notional amount, entered into during period		$ 550,000,000
Currency swap | Net Investment Hedging | Derivatives designated for hedge accounting | CAD
Derivative [Line Items]
Notional amounts of derivative					$ 6,500		$ 6,500
Currency swap | Net Investment Hedging | Derivatives designated for hedge accounting | CAD | Subsequent Event
Derivative [Line Items]
Derivative, notional mount, terminated			$ 6,500
Notional amounts of derivative			$ 7,500
Currency swap | Fair Value Hedges | Derivatives designated for hedge accounting | EUR
Derivative [Line Items]
Notional amounts of derivative | €						€ 500		€ 500
Currency swap | Fair Value Hedges | Derivatives designated for hedge accounting | EUR | Subsequent Event
Derivative [Line Items]
Notional amounts of derivative | €				€ 500
Currency swap | Cash Flow Hedges | Derivatives designated for hedge accounting
Derivative [Line Items]
Gains (losses) related to cash flow hedges	$ 7,000,000

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