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Long-term Debt - Textual (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 31, 2020 | Dec. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Oct. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  | $ 0 | $ 0 | $ 0 | $ 2,300,000 |  |
Senior Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from debt issuance costs | $ 583,000,000 |  |  |  |  |  |  |
Senior Notes | 4.50% Senior Notes due 2028 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount | $ 300,000,000 |  |  |  |  |  |  |
Debt instrument interest rate (percent) | 4.50% |  | 4.50% |  | 4.50% |  |  | 4.50%
Issuance of face value (percent) | 99.00% |  |  |  |  |  |  |
Redemption amount |  |  | $ 784,600,000 |  | $ 784,600,000 |  |  | $ 491,700,000
Senior Notes | 4.75% Senior Notes due 2030 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount | $ 300,000,000 |  |  |  |  |  |  |
Debt instrument interest rate (percent) | 4.75% |  | 4.75% |  | 4.75% |  |  | 4.75%
Issuance of face value (percent) | 98.50% |  |  |  |  |  |  |
Redemption amount |  |  | $ 782,800,000 |  | $ 782,800,000 |  |  | $ 491,700,000
Senior Notes | 4.625% Senior Notes due 2031 | Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 400,000,000 |
Debt instrument interest rate (percent) |  |  |  |  |  |  | 4.625% |
Senior Notes | 5.75% Senior Notes due 2024 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument interest rate (percent) |  |  | 5.75% |  | 5.75% |  |  | 5.75%
Redemption amount |  |  | $ 697,700,000 |  | $ 697,700,000 |  |  | $ 697,300,000
Senior Notes | 5.75% Senior Notes due 2024 | Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument interest rate (percent) |  |  |  |  |  |  | 5.75% |
Redemption amount |  |  |  |  |  |  | $ 700,000,000 |
Senior Notes | 5.75% Senior Notes due 2024 | Subsequent Event | Forecast |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  | $ 2,000,000 |  |  |  |  |  |

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