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Debt - Interest Expense (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022
Debt Disclosure [Abstract] |  |  |  |
Interest expense, net (Unrecognized contractual interest expense for debt subject to compromise was $132.9 million for the four months ended April 30, 2021) | $ 2.4 | $ 31.0 | $ 68.9 | $ 45.3
Interest Costs Capitalized | $ 0.0 | 0.0 | 5.6 | 1.2
Amortization of Debt Discount (Premium) |  | $ 0.5 | $ 5.0 | $ 1.0

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