Interest and Other Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Interest expense	$ 9.2	$ 8.2	$ 18.7	$ 16.2
Interest income	(0.8)	(0.7)	(1.5)	(1.2)
Foreign exchange losses	0.7	0.0	1.6	0.7
Miscellaneous expense (income), net	1.2	(0.3)	4.2	2.1
Interest and other expenses	$ 10.3	$ 7.2	$ 23.0	$ 17.8