Income Taxes - Schedule of Income Tax Expense (Benefit) for Continuing Operations (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 07, 2021	Dec. 31, 2022	Dec. 31, 2020
Current:
Federal	$ 0.0	$ 0.0	$ 0.0	$ (1.4)
State and local	(0.4)	0.7	0.6	0.6
Foreign	1.6	3.1	6.4	3.5
Total current	1.2	3.8	7.0	2.7
Deferred:
Federal	(9.2)	(16.1)	(37.9)	(13.8)
State and local	7.4	(3.8)	2.7	7.7
Foreign	(0.7)	(0.8)	(3.1)	(1.3)
Total deferred	(2.5)	(20.7)	(38.3)	(7.4)
Valuation allowance	(6.0)	0.0	(3.8)	(20.8)
Total	$ (7.3)	$ (16.9)	$ (35.1)	$ (25.5)