Supplemental Financial Data - Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 07, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 34.4			$ 34.4
Acquisition				60.8
Additions charged (credited) to costs and expenses	0.0	$ 4.2		(27.2)
Additions charged (credited) due to foreign currency fluctuations	0.0	(1.6)		0.2
Additions charged (credited) to other accounts	0.0	0.2
Balance at end of period	$ 34.4	39.4
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		$ 36.6	$ 33.8
Additions charged (credited) to costs and expenses			0.5
Additions charged (credited) due to foreign currency fluctuations			2.3
Additions charged (credited) to other accounts			0.0
Balance at end of period			$ 36.6	$ 33.8