Other Charges, Net - Restructuring Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in the restructuring reserves
Balance at the beginning of the period	$ 10.8	$ 16.2	$ 23.1
Restructuring charges	9.4	16.2	20.8
Cash payments	(9.2)	(17.1)	(22.1)
Non-cash adjustments	(3.5)	(5.5)	(5.4)
Foreign currency impact	(0.2)	1.0	(0.2)
Balance at the end of the period	7.3	10.8	16.2
Severance
Changes in the restructuring reserves
Balance at the beginning of the period	2.0	4.9	10.3
Restructuring charges	4.1	7.7	10.6
Cash payments	(4.4)	(10.1)	(15.6)
Non-cash adjustments	0.3	(0.7)	(0.4)
Foreign currency impact		0.2
Balance at the end of the period	2.0	2.0	4.9
Exit Costs
Changes in the restructuring reserves
Balance at the beginning of the period	2.1	3.7	2.4
Restructuring charges	5.3	6.2	7.2
Cash payments	(4.8)	(6.8)	(5.6)
Non-cash adjustments	(1.2)	(1.0)	(0.3)
Balance at the end of the period	1.4	2.1	3.7
Provisions for Excess Inventory
Changes in the restructuring reserves
Balance at the beginning of the period	6.7	7.6	10.4
Restructuring charges		2.3	3.0
Cash payments		(0.2)	(0.9)
Non-cash adjustments	(2.6)	(3.8)	(4.7)
Foreign currency impact	(0.2)	0.8	(0.2)
Balance at the end of the period	$ 3.9	$ 6.7	$ 7.6