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Derivative Financial Instruments and Risk Management - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Jan. 03, 2025 USD ($) instrument	Jun. 30, 2023 USD ($)	Jun. 30, 2020 derivative	May 31, 2020 USD ($)
Derivatives, Fair Value [Line Items]
Derivatives designated as hedges	$ 2.0	$ (4.0)	$ 0.0	$ (24.0)
Designated as Hedging Instrument \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivatives designated as hedges					$ 20.0
Foreign Exchange Contract \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, term of contract (less than)			1 year
Cross currency swap amount	447.0		$ 447.0
Cross Currency Swaps Expiring in June 2029 and 2031 \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Cross currency swap amount	2,000.0		2,000.0
Other Liabilities	7.0		7.0				$ 23.0
Recorded in accumulated other comprehensive income, net of tax	5.0		5.0				17.0
Cross Currency Swaps Expiring in June 2029 \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Cross currency swap amount						$ 986.0
Cross Currency Swaps Expiring in June 2030 \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Cross currency swap amount						578.0
Cross Currency Swaps Expiring in June 2031 \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Cross currency swap amount						$ 581.0
Cross Currency Swaps Expiring in January 2032
Derivatives, Fair Value [Line Items]
Number of foreign currency derivatives held \| instrument								5
Cross Currency Swaps Expiring in January 2032 \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Cross currency swap amount								$ 691.0
Other Liabilities	93.0		93.0				$ 117.0
Recorded in accumulated other comprehensive income, net of tax	$ 19.0		$ 19.0
Forward Starting Interest Rate Swap \| Designated as Hedging Instrument \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Cross currency swap amount									$ 200.0		$ 50.0
Number of derivative instruments held \| derivative										4