Fresh Start Accounting - Impact on Accumulated Deficit (Details) - USD ($) $ in Millions	Mar. 31, 2021	Feb. 09, 2021
Reorganizations [Abstract]
Fresh start adjustments to property and equipment	$ 443
Fresh start adjustments to other long-term assets	(84)
Fresh start adjustments to long-term debt	(52)	$ (1,261)
Fresh start adjustments to long-term asset retirement obligations	(97)
Fresh start adjustments to accumulated other comprehensive income	(9)
Total liabilities and stockholders’ equity (deficit)	201
Income tax effects on accumulated other comprehensive income	57
Net impact to accumulated deficit	$ 258

Fresh-Start Adjustment, Increase (Decrease), Income Tax Effects On Accumulated Other Comprehensive Income (Loss)

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Fresh-Start Adjustment, Increase (Decrease), Long-Term Asset Retirement Obligations

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Fresh-Start Adjustment, Net Impact To Accumulated Deficit

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Amount of fresh-start adjustment to accumulated other comprehensive Income or Loss.

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Total fresh-start adjustment to liabilities and stockholders' equity.

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Total fresh-start adjustment to long-term debt.

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Amount of fresh-start adjustment to total other noncurrent assets.

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Total fresh-start adjustment to property and equipment, net.

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