Fresh Start Accounting - Debt and Warrants (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 09, 2021	Dec. 31, 2023
Debt Instrument [Line Items]
Implied stock price (in dollars per share)	$ 20.52
Expected volatility rate	58.00%
Expected dividend yield rate	0.00%
Repayments of long-term debt	$ 1,179
Net impact to long-term debt, net	$ 1,313	$ 1,950
Class A Warrants
Debt Instrument [Line Items]
Warrant, exercise price (in dollars per share)	$ 27.63	$ 23.25
Class B Warrants
Debt Instrument [Line Items]
Warrant, exercise price (in dollars per share)	32.13	27.04
Class C Warrants
Debt Instrument [Line Items]
Warrant, exercise price (in dollars per share)	$ 36.18	$ 30.45
Senior notes | 5.50% senior notes due 2026
Debt Instrument [Line Items]
Debt, principal	$ 500
Interest rate	5.50%	5.50%
Senior notes | 5.875% senior notes due 2029
Debt Instrument [Line Items]
Debt, principal	$ 500
Interest rate	5.875%	5.875%
Secured Debt
Debt Instrument [Line Items]
Net impact to long-term debt, net	$ 750