Derivative and Hedging Activities - Cash Flow Hedges Components of AOCI (Details) - USD ($) $ in Millions		1 Months Ended	11 Months Ended	12 Months Ended
		Feb. 09, 2021	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, after tax, beginning of period			$ 0
Losses reclassified to income, after tax	[1]	$ 3	0	$ 0	$ 0
AOCI, after tax, end of period		0
Cash flow hedging
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, before tax, beginning of period		(12)	0
AOCI, after tax, beginning of period		45	$ 0
Losses reclassified to income, before tax		3
Losses reclassified to income, after tax		3
Fresh start adjustments, before tax		9
Fresh start adjustments, after tax		9
Elimination of tax effects, before tax		0
Elimination of tax effects, after tax		(57)
AOCI, before tax, end of period		0
AOCI, after tax, end of period		$ 0

[1] Deferred tax activity incurred in other comprehensive income was offset by a valuation allowance.