Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 07, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross unrecognized tax benefits at beginning of period	$ 5.4	$ 14.3	$ 18.9	$ 17.1
Additions for current year’s tax positions	8.9	5.3	0.5	2.3
Settlements with taxing authority		(1.6)	(0.4)
Reduction in prior years’ tax positions		(0.1)
Increase in prior years’ tax positions			0.6	0.3
Reduction due to expired statute of limitations		(0.8)	(1.0)	(0.8)
Gross unrecognized tax benefits at end of period	$ 14.3	$ 17.1	$ 18.6	$ 18.9