Income Taxes (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		4 Months Ended	8 Months Ended	9 Months Ended
	Feb. 02, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Income Taxes [Abstract]
Effective Income Tax Rate Reconciliation, Percent	18.20%	19.20%	(2.10%)	7.00%	13.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				22.50%		22.50%
Unrecorded tax benefits		$ 14.7		$ 14.7	$ 14.7	$ 14.7	$ 13.2
Deferred Tax Liabilities, Gross		32.4		32.4	32.4	32.4
Deferred Tax Assets, Valuation Allowance		$ 96.8		$ 96.8	$ 96.8	$ 96.8