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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

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
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-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 45
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 2
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- Definition

Amount of interest capitalized during the period.

+ References

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
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- Definition

Amount of interest expense classified as other.

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