Income Taxes (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended
	Feb. 09, 2021	Mar. 31, 2021	Mar. 31, 2022	Sep. 30, 2021
Business Acquisition [Line Items]
Effective income tax rate	1.10%			5.70%
Income tax benefit	$ 57	$ 0	$ 46
Deferred tax asset, operating loss carryforward, limitations			54
Cancellation of debt income			5,000
Federal
Business Acquisition [Line Items]
NOL carryforwards, subject to expiration			$ 593