Financial Instruments - Carrying Amount and Estimated Fair Value of Asset (Liability) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
5.000% Senior Unsecured Notes | Unsecured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate on debt instrument (as a percent)	5.00%	5.00%
Carrying amount | Long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value disclosure of debt instrument	$ 455.1	$ 454.9
Carrying amount | Revolving facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value disclosure of debt instrument	0.0	25.0
Carrying amount | Term loan facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value disclosure of debt instrument	3,082.7	3,065.3
Fair value | Long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value disclosure of debt instrument	423.0	420.3
Fair value | Revolving facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value disclosure of debt instrument	0.0	24.6
Fair value | Term loan facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value disclosure of debt instrument	$ 2,925.2	$ 3,003.9