Derivative and Hedging Activities - Cash Flow Hedges Components of AOCI (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 09, 2021	Mar. 31, 2021	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI, after tax, beginning of period		$ 0
Losses reclassified to income, after tax	$ 3	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	0
AOCI, after tax, beginning of period	45	0	0
Losses reclassified to income, before tax	3	0	0
Losses reclassified to income, after tax	3	0	0
Fresh start adjustments, before tax	9	0	0
Fresh start adjustments, after tax	9	0	0
Elimination of tax effects, before tax	0	0	0
Elimination of tax effects, after tax	(57)	0	0
AOCI, before tax, end of period	0	0	0
AOCI, after tax, end of period	$ 0	$ 0	$ 0