Interest and Other Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 9.2	$ 9.2	$ 27.9	$ 25.4
Interest income	(1.0)	(0.7)	(2.5)	(1.9)
Foreign exchange (gain) loss	0.0	(0.2)	1.6	0.5
Miscellaneous expenses, net	3.2	1.1	7.4	3.2
Interest and other expenses	$ 11.4	$ 9.4	$ 34.4	$ 27.2