Financial Instruments and Risk Management - Fair Value and Carrying Value of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value | Revolving Credit Facility | Term Loan Due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	$ 2,148.2	$ 2,169.9
Fair Value | Senior Notes | Senior Secured Notes Due 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	853.2	0.0
Par Value | Revolving Credit Facility | Term Loan Due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	2,161.7	2,183.5
Par Value | Senior Notes | Senior Secured Notes Due 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	$ 850.0	$ 0.0