Fresh Start Accounting - Impact on Accumulated Deficit (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Feb. 09, 2021
Reorganization, Chapter 11 [Line Items]
Total property and equipment, net	$ 11,783	$ 8,802	$ 5,670
Other long-term assets	93	104	114
Long-term debt, net			(1,313)
Asset retirement obligations, net of current portion	$ (337)	$ (349)	(236)
Income tax effects on accumulated other comprehensive income			57
Fresh Start Adjustments
Reorganization, Chapter 11 [Line Items]
Total property and equipment, net			443
Other long-term assets			(84)
Long-term debt, net			(52)
Asset retirement obligations, net of current portion			(97)
Fresh start adjustments to accumulated other comprehensive income			(9)
Total fresh start adjustments impacting reorganizations items, net			201
Income tax effects on accumulated other comprehensive income			57
Net impact to accumulated deficit			$ 258