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Fresh Start Accounting - Narrative (Details) - USD ($) |  | 4 Months Ended | 8 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 30, 2021 | Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Enterprise Value | $ 1,860,000,000 | $ 1,860,000,000 |  |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 2.81% | 2.81% |  |  |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets | 6.03% | 6.03% | 6.03% | 6.70% |  | 6.48%
Property and equipment, net | $ 909,100,000 | $ 909,100,000 | $ 890,900,000 | $ 15,096,900,000 | $ 890,900,000 | $ 10,960,500,000
Prepaid Rent, Per Rig | 8,000,000 | 8,000,000 |  |  |  |
Predecessor, Additional Paid In Capital | 0 | 0 |  |  |  |
Treasury Stock, Value | 0 | 0 | $ 0 |  | $ 0 | (76,200,000)
Common shares, shares issued |  |  | 75,000,000 |  | 75,000,000 |
Additional paid-in capital | $ 1,078,700,000 | 1,078,700,000 | $ 1,083,000,000 |  | $ 1,083,000,000 | 8,639,900,000
Class Of Warrant, Exercisable | 5,600,000 |  |  |  |  |
Warrants and Rights Outstanding | $ 16,400,000 | 16,400,000 | $ 16,400,000 |  | $ 16,400,000 | $ 0
Reorganization, Chapter 11, Plan Effect Adjustment |  |  |  |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Property and equipment, net | (417,600,000) | (417,600,000) |  |  |  |
Debt Instrument, Face Amount | 550,000,000 | 550,000,000 |  |  |  |
Debt Issuance Costs, Net | (5,200,000) | (5,200,000) |  |  |  |
Common Stock, Value, Issued | (800,000) | (800,000) |  |  |  |
Predecessor, Additional Paid In Capital | 8,644,000,000 | 8,644,000,000 |  |  |  |
Treasury Stock, Value | $ 75,500,000 | $ 75,500,000 |  |  |  |
Common shares, shares issued | 75,000,000 | 75,000,000 |  |  |  |
Additional paid-in capital | $ 1,078,700,000 | $ 1,078,700,000 |  |  |  |
Warrants and Rights Outstanding | 16,400,000 | 16,400,000 |  |  |  |
Reorganization, Chapter 11, Plan Effect Adjustment | Common Class A And B Shares |  |  |  |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Common Stock, Value, Issued | 82,600,000 | 82,600,000 |  |  |  |
Reorganization, Chapter 11, Plan Effect Adjustment | Work in progress |  |  |  |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Property and equipment, net | (417,600,000) | (417,600,000) |  |  |  |
Minimum |  |  |  |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Enterprise Value | 1,860,000,000 | 1,860,000,000 |  |  |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets |  |  |  |  |  | 6.03%
Maximum |  |  |  |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |  |  |  |
Enterprise Value | $ 3,145,000,000 | $ 3,145,000,000 |  |  |  |
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets |  |  |  |  | 6.26% |

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