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Fair Value Measurements - Schedule of Carrying Amounts and Estimated Fair Values, Financial Instruments (Details) - USD ($) $ in Millions | Jun. 30, 2020 | May 31, 2020 | Dec. 31, 2019
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Term loan facilities | Term loan facilities | Carrying Amount |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | $ 258.0 |  | $ 265.2
Term loan facilities | Term loan facilities | Estimated Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | $ 259.9 |  | $ 266.6
Senior Notes | 5.125% Senior Notes due 2023 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt instrument interest rate (percent) | 5.125% |  | 5.125%
Senior Notes | 5.125% Senior Notes due 2023 | Carrying Amount |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | $ 297.7 |  | $ 297.3
Senior Notes | 5.125% Senior Notes due 2023 | Estimated Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | $ 301.5 |  | $ 306.6
Senior Notes | 5.75% Senior Notes due 2024 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt instrument interest rate (percent) | 5.75% |  | 5.75%
Senior Notes | 5.75% Senior Notes due 2024 | Carrying Amount |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | $ 697.6 |  | $ 697.3
Senior Notes | 5.75% Senior Notes due 2024 | Estimated Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | $ 703.5 |  | $ 708.8
Senior Notes | 5.75% Senior Notes due 2025 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt instrument interest rate (percent) | 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 | $ 346.0 |  | $ 345.6
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 | $ 359.7 |  | $ 369.7
Senior Notes | 4.50% Senior Notes due 2028 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt instrument interest rate (percent) | 4.50% | 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 | $ 784.1 |  | $ 491.7
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 | $ 770.0 |  | $ 519.4
Senior Notes | 4.75% Senior Notes due 2030 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt instrument interest rate (percent) | 4.75% | 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 | $ 782.5 |  | $ 491.7
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 | 771.2 |  | 520.0
Other notes payable | Carrying Amount |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying amounts and estimated fair values of financial instruments | 40.4 |  | 44.7
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 | 40.4 |  | 44.7
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 |  | 45.0
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 |  | 45.0
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 | $ 36.3 |  | $ 38.9

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