Derivative Financial Instruments and Hedging (Details) - USD ($) $ in Millions	Jun. 30, 2026	Sep. 30, 2025
Commodity and energy contracts \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value
Notional Amount of Derivative	$ 84.9	$ 113.2
Foreign Exchange Contract - Forward Contracts \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value
Notional Amount of Derivative	11.3	4.3
Interest Rate Swaps \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value
Notional Amount of Derivative	300.0	300.0
Location, Statement of Financial Position, Balance: us-gaap:Assets
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Asset	9.0	4.0
Location, Statement of Financial Position, Balance: us-gaap:Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value, Gross Liability	4.7	9.7
Location, Statement of Financial Position, Balance: us-gaap:OtherAssetsNoncurrent \| Interest Rate Swaps
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Asset	3.6	1.5
Location, Statement of Financial Position, Balance: us-gaap:OtherLiabilitiesCurrent \| Commodity and energy contracts
Derivatives, Fair Value
Derivative Liability, Fair Value, Gross Liability	4.6	5.8
Location, Statement of Financial Position, Balance: us-gaap:OtherLiabilitiesCurrent \| Foreign Exchange Contract - Forward Contracts
Derivatives, Fair Value
Derivative Liability, Fair Value, Gross Liability	0.1	0.1
Location, Statement of Financial Position, Balance: us-gaap:OtherLiabilitiesCurrent \| Interest Rate Swaps
Derivatives, Fair Value
Derivative Liability, Fair Value, Gross Liability	0.0	0.3
Location, Statement of Financial Position, Balance: us-gaap:OtherLiabilitiesNoncurrent \| Interest Rate Swaps
Derivatives, Fair Value
Derivative Liability, Fair Value, Gross Liability	0.0	3.5
Location, Statement of Financial Position, Balance: us-gaap:PrepaidExpenseAndOtherAssetsCurrent \| Commodity and energy contracts
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Asset	4.5	2.2
Location, Statement of Financial Position, Balance: us-gaap:PrepaidExpenseAndOtherAssetsCurrent \| Interest Rate Swaps
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Asset	$ 0.9	$ 0.3