Borrowings and Other Obligations - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	May 22, 2023	Dec. 31, 2022	Oct. 27, 2021	Sep. 30, 2021	Dec. 12, 2019
Debt Instrument [Line Items]
Finance Lease, Liability, Current	$ 16		$ 14
Current portion of long-term debt and term loan agreement	91		45
Finance Lease, Liability, Noncurrent	35		41
Long-term Debt and Lease Obligation	1,864		2,203
Exit Notes, 11.00 Percent Due 2024
Debt Instrument [Line Items]
Long-term debt		$ 105
Senior Notes | Senior Notes 6.5 Percent Due 2028
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	75		11
Long-term debt	242		471
Debt Instrument, Interest Rate, Stated Percentage					6.50%
Senior Notes | Exit Notes, 11.00 Percent Due 2024
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	0		20
Long-term debt	0		105
Debt Instrument, Interest Rate, Stated Percentage						11.00%
Senior Notes | Senior Notes 8.625 Percent Due 2030
Debt Instrument [Line Items]
Long-term debt	$ 1,587		$ 1,586
Debt Instrument, Interest Rate, Stated Percentage				8.625%