Financial Instruments and Risk Management - Narrative (Details) mmbtus in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($) mmbtus	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)
Derivative [Line Items]
Cash flow hedged gains to be reclassified within 12 months	$ 0.4
Foreign currency hedging
Derivative [Line Items]
Floating-to-fixed interest rate swap	4.3
Derivative, fair value, net asset (liability)	(0.3)	$ 0.1
Natural gas contracts
Derivative [Line Items]
Derivative, fair value, net asset (liability)	$ (0.5)	0.3
Natural gas contracts | Swap
Derivative [Line Items]
Derivative, nonmonetary notional amount | mmbtus	1.8
Interest rate swap contracts
Derivative [Line Items]
Floating-to-fixed interest rate swap	$ 200.0		$ 200.0
Derivative, fair value, net asset (liability)	$ (0.2)	$ 0.6
Derivative, variable interest rate			4.32%
Fixed rate			3.84%