Debt (2023 Debt Financing Transactions) (Details) - USD ($)		12 Months Ended
	Feb. 28, 2023	Dec. 31, 2022	Oct. 31, 2022	Aug. 31, 2021
Long-Term Debt
Principal				$ 1,000,000,000
Unsecured senior notes | Senior Guaranteed Notes Due January 2030 | Scenario, Forecast
Long-Term Debt
Interest rate	7.25%
Unsecured senior notes | Senior Guaranteed Notes 9.250%, Due 2029
Long-Term Debt
Principal			$ 1,000,000,000
Interest rate			9.25%
Unsecured senior notes | Senior Guaranteed Notes 9.250%, Due 2029 | Scenario, Forecast
Long-Term Debt
Interest rate	9.25%
Credit agreement | Term Loan Facility, $700 Million
Long-Term Debt
Debt instrument, term		364 days
Credit agreement | Term Loan Facility, $700 Million | Scenario, Forecast
Long-Term Debt
Debt terminated	$ 700,000,000
Debt instrument, term	364 days
Credit agreement | Senior Unsecured Note, Backstop Committed Financing | Scenario, Forecast
Long-Term Debt
Debt terminated	$ 350,000,000