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Chapter 11 Proceedings and Ability to Continue as Going Concern - Schedule of Reorganization Items (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2020
Reorganizations [Abstract] |  |  |  |
DIP facility fees | $ 0.0 | $ 0.0 | $ 0.0 | $ 20.0
Debtor Reorganization Items, Legal and Advisory Professional Fees | 93.4 | 17.2 | 2.4 | 66.8
Contract items | 3.9 | (1.7) | 0.0 | 4.4
Reorganization items (fees) | 97.3 | 15.5 | 2.4 | 91.2
Backstop Commitment Fees | 0.0 | 0.0 | 0.0 | 447.9
Contract items | 0.5 | 0.0 | 0.0 | (11.5)
Backstop premium | 30.0 | 0.0 | 0.0 | 0.0
Debtor Reorganization Items, Gain (Loss) on Settlement of Other Claims, Net | (6,139.0) | 0.0 | 0.0 | 0.0
Debtor Reorganization items, Issuance Of Equity Backstop Premium | 29.1 | 0.0 | 0.0 | 0.0
Debtor Reorganization Items, Issuance Of Common Shares To The Shipyard | 5.4 | 0.0 | 0.0 | 0.0
Debtor Reorganization items, Share-Based Compensation Expense | 16.0 | 0.0 | 0.0 | 0.0
Debtor Reorganization items, Contract For Property, Plant And Equipment | 350.7 | 0.0 | 0.0 | 0.0
Debtor Reorganization items, Loss On Fresh-Start Adjustments | 9,194.6 | 0.0 | 0.0 | 0.0
Debtor Reorganization Items, Non-cash | 3,487.3 | 0.0 | 0.0 | 436.4
Reorganization Items, Total | 3,584.6 | 15.5 | 2.4 | 527.6
Debtor Reorganization Items, Items (Fees), Unpaid | 38.3 | 0.8 | 0.0 | 61.2
Debtor Reorganization Items, Items (Fees), Paid | $ 59.0 | $ 14.7 | $ 2.4 | $ 30.0

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- Definition Amount of reorganization items related to debtor-in-possession facility financing costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=124437977&loc=SL2890576-112764 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124437977&loc=d3e55730-112764 + Details
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- Definition Amount of net gain (loss) on settlement of other claims for entities in bankruptcy, reported as a reorganization item. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124437977&loc=d3e55730-112764 + Details
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