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Income Taxes - Effective Income Tax Expense (Benefit) Table (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
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense (benefit) at the federal statutory rate of 21%		$ 1,119	$ 188	$ 767	$ (2,051)
State income taxes (net of federal income tax benefit)		238	(86)	75	(41)
Change in valuation allowance due to Acquisitions		0	(49)	19	0
Change in valuation allowance excluding impact of Acquisitions		(1,191)	(179)	(2,147)	2,010
Reorganization items		(173)	60	0	41
Transaction costs		0	11	2	0
Removal of stranded tax effects in accumulated other comprehensive income		(57)	0	0	0
Other		7	6	(1)	22
Total	$ (57)	$ (57)	$ (49)	$ (1,285)	$ (19)

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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