Reorganization and Fresh Start Accounting - Valuation Process (Details) - Long-term drilling services contracts $ in Millions	Feb. 05, 2021 USD ($)
Reorganization, Chapter 11 [Line Items]
Intangible Assets, Amount Above Fair Value	$ 113.4
Measurement Input, Discount Rate
Reorganization, Chapter 11 [Line Items]
Intangible Assets, Measurement Input	0.17

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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