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Fresh Start Accounting - Cumulative Net Impact on Accumulated Deficit (Details) - USD ($) $ in Millions		1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 09, 2021	Feb. 09, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020
Reorganization, Chapter 11 [Line Items]
Total reorganization items, net		$ (5,569)	$ 0	$ 0	$ 796
Net impact on accumulated deficit	$ 0	0	$ 825	$ 3,399
Reorganization Adjustments
Reorganization, Chapter 11 [Line Items]
Gain on settlement of liabilities subject to compromise	6,443	6,443			12
Accrual of professional service provider success fees	(38)	(38)
Accrual of professional service provider fees	(5)	(5)
Surrender of other receivable	(18)	18			0
Payment of FLLO alternative transaction fee	(12)
Total reorganization items, net	6,370	(5,569)			$ 796
Cancellation of predecessor equity	18,571	18,571
Net impact on accumulated deficit	$ 24,941	$ 24,941

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