Long-Term Debt and Note Payable - Affiliate - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Long-term debt
Unamortized premiums, net	$ 4	$ 5
Unamortized debt issuance costs	(52)	(52)
Total long-term debt	2,157	2,157
Less current maturities	(1)	(2)
Long-term debt, excluding current maturities	2,156	2,155
Senior notes
Long-term debt
Long-term debt, gross	$ 1,986	1,986
Senior notes | Minimum
Long-term debt
Stated interest rate	6.50%
Senior notes | Maximum
Long-term debt
Stated interest rate	7.75%
Term loan
Long-term debt
Long-term debt, gross	$ 215	$ 215
Weighted average interest rate	7.717%	6.64%
Term loan | SOFR
Long-term debt
Basis spread on variable rate	2.50%
Finance lease and other obligations
Long-term debt
Long-term debt, gross	$ 4	$ 3