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Debt (Summary of Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Apr. 03, 2025	Dec. 31, 2024	Mar. 15, 2023
Debt [Line Items]
Weighted average interest rate	5.34%
Short-term debt	$ 73.6		$ 27.7
Less: Unamortized debt issuance costs	(17.2)		(21.3)
Total long-term debt	2,568.6		2,626.2
Less: Current portion of long-term debt	51.2		4.1
Long-term debt	$ 2,517.4		2,622.1
Delayed Draw Term Loans
Debt [Line Items]
Less: Unamortized debt issuance costs		$ (3.9)
Revolving Credit Facility \| Line of Credit
Debt [Line Items]
Weighted average interest rate	5.67%
Long-term debt	$ 225.0		0.0
CAD TLA Facility \| Delayed Draw Term Loans
Debt [Line Items]
Weighted average interest rate	4.34%
Long-term debt	$ 72.7		72.5
USD TLA Facility \| Delayed Draw Term Loans
Debt [Line Items]
Weighted average interest rate	5.78%
Long-term debt	$ 938.1		1,225.0
Senior Secured Notes \| Secured Debt
Debt [Line Items]
Interest rate	6.75%			6.75%
Long-term debt	$ 550.0		550.0
Senior Unsecured Notes \| Unsecured Debt
Debt [Line Items]
Interest rate	7.75%			7.75%
Long-term debt	$ 800.0		$ 800.0