Income Taxes - Income and Taxes from Cont. Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income (loss) from continuing operations before income taxes
U.S.	$ (72.9)	$ (90.2)	$ (32.9)
Foreign	152.2	183.7	75.4
Income from continuing operations before tax	79.3	93.5	42.5
Current tax expense (benefit)
U.S. federal	(0.8)	(0.8)	(2.3)
State	(0.6)	4.3	0.7
Foreign	86.2	90.8	92.1
Current tax expense	84.8	94.3	90.5
Deferred tax expense (benefit)
U.S. federal	(7.9)	(30.4)	(7.5)
State	(1.6)	(4.8)	(2.9)
Foreign	(18.7)	1.9	(10.1)
Deferred tax expense (benefit)	(28.2)	(33.3)	(20.5)
Provision for income taxes of continuing operations	56.6	61.0	70.0
Comprehensive provision (benefit) for income taxes allocable to
Continuing operations	56.6	61.0	70.0
Discontinued operations	(0.2)	0.2	0.0
Other comprehensive income (loss)	(12.4)	0.4	5.0
Equity	(0.6)
Comprehensive provision for income taxes	$ 43.4	$ 61.6	$ 75.0