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Fair Value Measurements - Carrying Amounts and Estimated Fair Values, Financial Instruments (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Carrying Amount | Other notes payable |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 84.0 | $ 94.5
Estimated Fair Value | Other notes payable |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 84.0 | $ 94.5
5.75% Senior Notes due 2025 | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt instrument interest rate (as percent) | 5.75% | 5.75%
5.75% Senior Notes due 2025 | Carrying Amount | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 99.9 | $ 99.8
5.75% Senior Notes due 2025 | Estimated Fair Value | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 99.9 | $ 99.7
4.50% Senior Notes due 2028 | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt instrument interest rate (as percent) | 4.50% | 4.50%
4.50% Senior Notes due 2028 | Carrying Amount | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 790.2 | $ 788.4
4.50% Senior Notes due 2028 | Estimated Fair Value | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 792.5 | $ 772.3
4.75% Senior Notes due 2030 | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt instrument interest rate (as percent) | 4.75% | 4.75%
4.75% Senior Notes due 2030 | Carrying Amount | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 785.5 | $ 784.2
4.75% Senior Notes due 2030 | Estimated Fair Value | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 789.4 | $ 759.0
4.625% Senior Notes due 2031 | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt instrument interest rate (as percent) | 4.625% | 4.625%
4.625% Senior Notes due 2031 | Carrying Amount | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | $ 393.0 | $ 392.5
4.625% Senior Notes due 2031 | Estimated Fair Value | Senior Notes |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | 386.1 | 369.9
Advances under revolving credit facility | Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | 0.0 | 20.0
Advances under revolving credit facility | Estimated Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Carrying amounts and estimated fair values of financial instruments | 0.0 | 20.0
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 | $ 46.7 | $ 36.3

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