Fresh-Start Accounting - Implied Fair Value (Details) $ in Millions	Jun. 16, 2022 USD ($)
Reorganization, Chapter 11 [Line Items]
Enterprise Value	$ 5,223.0
Enterprise Value Adjustments	197.0
Adjusted Enterprise Value	5,420.0
Reorganization Value, Present Value of Discounted Cash Flows of Emerging Entity	2,203.6
Reorganization Value	6,602.3
Cash and Cash Equivalents
Reorganization, Chapter 11 [Line Items]
Adjustments to Enterprise Value	297.9
Non-operating assets, net
Reorganization, Chapter 11 [Line Items]
Adjustments to Enterprise Value	178.7
Debt, fair value
Reorganization, Chapter 11 [Line Items]
Adjustments to Enterprise Value	(3,067.2)
Other Liabilities, Fair Value
Reorganization, Chapter 11 [Line Items]
Adjustments to Enterprise Value	(625.8)
Other Noncurrent Liabilities
Reorganization, Chapter 11 [Line Items]
Adjustments to Enterprise Value	183.2
Accrued and other current liabilities
Reorganization, Chapter 11 [Line Items]
Adjustments to Enterprise Value	$ 522.5