Debt (Summary of Debt) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Mar. 15, 2023	Dec. 31, 2022	Dec. 21, 2016
Debt [Line Items]
Short-term debt	$ 17.2			$ 29.1
Total long-term debt	3,123.4			581.5
Total debt	3,140.6			610.6
Current portion	18.6			4.4
Non-current portion	3,104.8			577.1
Term Loans
Debt [Line Items]
Less: unamortized debt issue costs	(18.1)			(0.4)
Delayed Draw Term Loan, In Canadian Dollars, Available until September 2026 [Member] | Term Loans
Debt [Line Items]
Long-term Debt				$ 85.5
Weighted average interest rate				5.86%
Term Loan A Facility Loan 7.69% Maturing in September 2026 [Member] | Term Loans
Debt [Line Items]
Long-term Debt	85.3
Weighted average interest rate		7.58%
Term Loan A Facility Loan 7.54% Maturing in September 2026 [Member] | Term Loans
Debt [Line Items]
Long-term Debt	1,725.0
Current portion	$ 14.1
Weighted average interest rate	7.67%
5.375% Senior Unsecured Note, Due January 2025 [Member] | Senior Unsecured Notes
Debt [Line Items]
Long-term Debt				$ 500.0
Less: unamortized debt issue costs				$ (3.6)
Interest rate				5.375%	5.375%
Maturity date	Jan. 15, 2025
6.75% Senior Secured Note, Due March 2028 [Member] | Senior Secured Notes
Debt [Line Items]
Long-term Debt	$ 550.0
Less: unamortized debt issue costs	$ (7.6)
Interest rate	6.75%		6.75%
7.75% Senior Unsecured Note, Due March 2031 [Member] | Senior Unsecured Notes
Debt [Line Items]
Long-term Debt	$ 800.0
Less: unamortized debt issue costs	$ (11.2)
Interest rate	7.75%		7.75%