Other Income (Expense), net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income (Expense) [Line Items]
Net foreign exchange transaction loss	$ (1.5)	$ (2.0)	$ (2.6)	$ (13.7)
Bank fee expense	(1.3)	(1.4)	(2.5)	(2.4)
Pension income other than service costs	0.5	2.7	0.9	5.2
Other, net	6.2	1.8	7.4	0.0
Other income (expense), net	3.9	$ 1.1	3.2	$ (10.9)
Claim For Overpayment Of Income Taxes
Other Income (Expense) [Line Items]
Other, net	$ 4.8		$ 4.8