Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 07, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 08, 2021
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of period					$ 0.0
Beginning of Period	$ 16.4	$ 23.0	$ 14.3	$ 13.0
Charge (Benefit) to Expenses	3.6	2.1	14.7	12.5
(To) From Other Accounts	0.0	0.0	0.0	0.0
Deductions	0.0	8.7	6.0	11.2
End of Period	3.6	16.4	23.0	14.3
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning of Period	24.4	28.4	49.3	48.7
Charge (Benefit) to Expenses	(6.0)	0.0	(20.8)	0.5
(To) From Other Accounts	0.0	(4.0)	(0.1)	0.1
Deductions	0.0	0.0	0.0	0.0
End of Period	$ 18.4	$ 24.4	$ 28.4	$ 49.3