Debt (Summary of Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Apr. 03, 2025	Dec. 31, 2024	Mar. 15, 2023
Debt [Line Items]
Weighted average interest rate	5.16%
Short-term debt	$ 137.5		$ 27.7
Less: Unamortized debt issuance costs	(15.3)		(21.3)
Total long-term debt	2,334.0		2,626.2
Less: current portion of long-term debt	51.2		4.1
Long-term debt	$ 2,282.8		2,622.1
TLA Facility loans
Debt [Line Items]
Less: Unamortized debt issuance costs		$ (3.9)
CAD TLA Facility | TLA Facility loans
Debt [Line Items]
Weighted average interest rate	4.06%
Long-term debt	$ 73.0		72.5
USD TLA Facility | TLA Facility loans
Debt [Line Items]
Weighted average interest rate	5.32%
Long-term debt	$ 926.3		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