Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt and lease obligations	$ 11,842	$ 11,635
Less: Unamortized deferred debt issuance costs and note premium	(359)	(402)
Less: Current maturities	(22)	(21)
Total long-term debt	11,820	11,614
Senior Secured Notes | Senior Secured Notes at 8%, Due 2026
Debt Instrument [Line Items]
Debt and lease obligations	2,101	2,101
Senior Secured Notes | Senior Secured Notes at 8%, Due 2027
Debt Instrument [Line Items]
Debt and lease obligations	700	700
Senior Secured Notes | Senior Secured Notes at 5.625% due 2027
Debt Instrument [Line Items]
Debt and lease obligations	1,900	1,900
Senior Secured Notes | Senior Secured Notes at 6%, Due 2029
Debt Instrument [Line Items]
Debt and lease obligations	900	900
Senior Secured Notes | Senior Secured Notes at 5.250%, Due 2030
Debt Instrument [Line Items]
Debt and lease obligations	1,535	1,535
Senior Secured Notes | Senior Secured Notes at 4.75%, Due 2031
Debt Instrument [Line Items]
Debt and lease obligations	1,058	1,058
Senior Notes | Senior Notes at 6.875%, Due 2028
Debt Instrument [Line Items]
Debt and lease obligations	756	756
Junior Priority Secured Notes | Junior-Priority Secured Notes at 6.875%, Due 2029
Debt Instrument [Line Items]
Debt and lease obligations	1,386	1,386
Junior Priority Secured Notes | Junior-Priority Secured Notes at 6.125%, Due 2030
Debt Instrument [Line Items]
Debt and lease obligations	1,232	1,232
Asset Based Loan Facility
Debt Instrument [Line Items]
Debt and lease obligations	230	53
Finance Lease and Financing Obligations
Debt Instrument [Line Items]
Debt and lease obligations	371	380
Other
Debt Instrument [Line Items]
Debt and lease obligations	$ 32	$ 36