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Emergence from Voluntary Reorganization under Chapter 11 - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 2 Months Ended |
--- | --- | ---
Nov. 19, 2020 | Dec. 31, 2020
Debt Instrument [Line Items] |  |
Issued of common stock (in shares) | 65,000,000 |
Warrants to purchase of number of shares (in shares) | 1,621,622 |
Warrant exercise price (in usd per share) | $ 94.57 |
Aggregate principal amount arranged | $ 20.6 |
Contractual interest expense | $ 15.6 |
Number of shares available for grant (in shares) |  | 16,050,000
Long Term Incentive Plan (LTIP) |  |
Debt Instrument [Line Items] |  |
Number of shares available for grant (in shares) | 2,402,402 | 2,793,360
Successor Board of Directors |  |
Debt Instrument [Line Items] |  |
Warrants to purchase of number of shares (in shares) | 1,621,622 |
Senior unsecured notes | Successor Board of Directors |  |
Debt Instrument [Line Items] |  |
Issued of common stock (in shares) | 20,000,000 |
6.50% senior unsecured notes due November 1, 2021 | Senior unsecured notes |  |
Debt Instrument [Line Items] |  |
Debt stated interest rate (percent) | 6.50% | 6.50%
6.875% senior unsecured notes due March 15, 2022 | Senior unsecured notes |  |
Debt Instrument [Line Items] |  |
Debt stated interest rate (percent) | 6.875% |
6.875% senior unsecured notes due January 15, 2023 | Senior unsecured notes |  |
Debt Instrument [Line Items] |  |
Debt stated interest rate (percent) | 6.875% |
6.25% senior unsecured notes due May 1, 2026 | Senior unsecured notes |  |
Debt Instrument [Line Items] |  |
Debt stated interest rate (percent) | 6.25% | 6.25%
2.625% senior unsecured convertible notes due September 15, 2023 | Senior unsecured notes |  |
Debt Instrument [Line Items] |  |
Debt stated interest rate (percent) | 2.625% | 2.625%
Exit Facility | Line of credit | Revolving credit facility |  |
Debt Instrument [Line Items] |  |
Aggregate principal amount arranged |  | $ 1,500.0
Initial financing available to the borrower | $ 575.0 |

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