Other (Expense) Income, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income (Expense) [Line Items]
Net foreign exchange transaction loss	$ (1.5)	$ (4.2)	$ (4.1)	$ (17.9)
Bank fee expense	(1.1)	(1.6)	(3.6)	(4.0)
Pension income other than service costs	0.2	0.5	1.1	5.7
Other, net	0.5	(4.5)	7.9	(4.5)
Other (expense) income, net	(1.9)	$ (9.8)	1.3	$ (20.7)
Claim For Overpayment Of Income Taxes
Other Income (Expense) [Line Items]
Other, net	$ 4.8		$ 4.8