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Fair Value Measurements - Carrying Amounts and Estimated Fair Values, Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Aug. 31, 2024
Dec. 31, 2023
Letters of credit | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 0.0   $ 0.0
Letters of credit | Estimated Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 36.3   $ 31.9
Senior Notes | 5.75% Senior Notes due 2025      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt instrument interest rate (as percent) 5.75% 5.75% 5.75%
Senior Notes | 5.75% Senior Notes due 2025 | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 199.5   $ 348.5
Senior Notes | 5.75% Senior Notes due 2025 | Estimated Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 199.5   $ 349.3
Senior Notes | 4.50% Senior Notes due 2028      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt instrument interest rate (as percent) 4.50%   4.50%
Senior Notes | 4.50% Senior Notes due 2028 | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 787.5   $ 785.0
Senior Notes | 4.50% Senior Notes due 2028 | Estimated Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 784.2   $ 763.6
Senior Notes | 4.75% Senior Notes due 2030      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt instrument interest rate (as percent) 4.75%   4.75%
Senior Notes | 4.75% Senior Notes due 2030 | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 783.5   $ 781.5
Senior Notes | 4.75% Senior Notes due 2030 | Estimated Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 781.7   $ 755.0
Senior Notes | 4.625% Senior Notes due 2031      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt instrument interest rate (as percent) 4.625%   4.625%
Senior Notes | 4.625% Senior Notes due 2031 | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 392.3   $ 391.5
Senior Notes | 4.625% Senior Notes due 2031 | Estimated Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments 383.0   369.4
Other notes payable | Carrying Amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments 90.7   66.0
Other notes payable | Estimated Fair Value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Carrying amounts and estimated fair values of financial instruments $ 90.7   $ 66.0