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 |
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 | | $ 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 | | $ 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 | | $ 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 |
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 | | 45 |
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 | | 45 |
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 |
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 |