Interest and Other Expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 10.2	$ 13.6
Interest income	(1.5)	(1.2)
Foreign exchange loss (gain)	2.9	(0.1)
Miscellaneous expense, net	0.3	3.8
Interest and other expenses	$ 11.9	$ 16.1