Income Taxes - Income Before Taxes and Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Domestic and foreign components of income before taxes:
Domestic	$ 3.8	$ (15.4)	$ (14.0)
Foreign	276.6	260.1	211.8
Income before income taxes and noncontrolling interest in consolidated subsidiaries	280.4	244.7	197.8
Current income tax (benefit) expense:
Federal	0.6	10.1	32.2
State	2.2	1.0	2.0
Foreign	82.1	61.8	42.7
Total current income tax expense	84.9	72.9	76.9
Deferred income tax (benefit) expense:
Federal	(2.2)	(15.4)	35.5
State	0.3	(0.3)	(0.4)
Foreign	(0.6)	6.5	5.5
Total deferred income tax (benefit) expense	(2.5)	(9.2)	40.6
Income tax provision	$ 82.4	$ 63.7	$ 117.5