Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Debt and lease obligations	$ 12,215	$ 12,140
Less: Unamortized deferred debt issuance costs and note premium	(474)	(435)
Less: Current maturities	(32)	(31)
Total long-term debt	12,183	12,109
Senior Secured Notes \| Senior Secured Notes at 6.625%, Due 2025
Debt Instrument [Line Items]
Debt and lease obligations		1,462
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 5.250%, Due 2030
Debt Instrument [Line Items]
Debt and lease obligations	1,535
Senior Secured Notes \| Senior Secured Notes at 4.75%, Due 2031
Debt Instrument [Line Items]
Debt and lease obligations	1,095	1,095
Senior Notes \| Senior Notes at 6.875%, Due 2028
Debt Instrument [Line Items]
Debt and lease obligations	767	767
Junior Priority Secured Notes \| Junior-Priority Secured Notes at 6.875%, Due 2029
Debt Instrument [Line Items]
Debt and lease obligations	1,775	1,775
Junior Priority Secured Notes \| Junior-Priority Secured Notes at 6.125%, Due 2030
Debt Instrument [Line Items]
Debt and lease obligations	1,440	1,440
Finance Lease and Financing Obligations
Debt Instrument [Line Items]
Debt and lease obligations	428	398
Other
Debt Instrument [Line Items]
Debt and lease obligations	$ 48	$ 37

Amount of short-term and long-term debt and lease obligation.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount of long-term debt and lease obligation, classified as current.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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