Other Charges, Net - Restructuring Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in the restructuring reserves
Balance at the beginning of the period	$ 4.6	$ 7.3	$ 10.8
Restructuring charges	15.8	1.4	9.4
Cash payments	(10.0)	(6.8)	(9.2)
Non-cash adjustments	(1.0)	2.9	(3.5)
Foreign currency impact	0.4	(0.2)	(0.2)
Balance at the end of the period	9.8	4.6	7.3
Severance
Changes in the restructuring reserves
Balance at the beginning of the period	2.2	2.0	2.0
Restructuring charges	13.6	6.1	4.1
Cash payments	(8.0)	(5.3)	(4.4)
Non-cash adjustments	(0.5)	(0.5)	0.3
Foreign currency impact	0.3	(0.1)
Balance at the end of the period	7.6	2.2	2.0
Exit Costs
Changes in the restructuring reserves
Balance at the beginning of the period	0.1	1.4	2.1
Restructuring charges	2.0	(5.0)	5.3
Cash payments	(2.0)	(1.5)	(4.8)
Non-cash adjustments	0.7	5.2	(1.2)
Balance at the end of the period	0.8	0.1	1.4
Provisions for Excess Inventory
Changes in the restructuring reserves
Balance at the beginning of the period	2.3	3.9	6.7
Restructuring charges	0.2	0.3
Non-cash adjustments	(1.2)	(1.8)	(2.6)
Foreign currency impact	0.1	(0.1)	(0.2)
Balance at the end of the period	$ 1.4	$ 2.3	$ 3.9