Derivative Financial Instruments and Fair Value Measurements - Schedule of Notional Principle, Fixed Rates and Expiration Dates of Outstanding Interest Rate Swap Agreements (Details) - Interest Rate Swap - Cash Flow Hedging - Designated as Hedging Instrument - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2021
Derivative [Line Items]
Notional Amount			$ 400.0
Fixed Rate (as percent)			1.283%
February 2023 | USD
Derivative [Line Items]
Notional Amount	$ 400.0	$ 400.0
Fixed Rate (as percent)	1.283%	1.283%