Operating Segment and Geographic Information - Reconciliation of Segment Data to Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Total segment operating income	$ 35.2	$ 21.6	$ 60.7	$ 44.2
Corporate costs	(64.2)	(66.0)	(130.8)	(134.1)
Repositioning expenses	(0.5)	(1.0)	(1.8)	(3.7)
Restructuring expenses and asset write offs	(6.5)	(0.4)	(14.1)	(3.5)
Net income attributable to noncontrolling interests	0.1	0.1	0.2	0.2
Income from continuing operations before income taxes	17.5	4.0	20.1	4.5
Operating Segments
Segment Reporting Information [Line Items]
Total segment operating income	35.2	21.6	60.7	44.2
Corporate
Segment Reporting Information [Line Items]
Corporate costs	(6.8)	(6.3)	(14.0)	(12.2)
Restructuring expenses and asset write offs	(1.5)	0.0	(4.4)	0.0
Segment Reconciling Items
Segment Reporting Information [Line Items]
Certain pension costs	(1.5)	(1.3)	(2.9)	(2.6)
Shareholder activism and other related costs	0.0	(3.8)	0.0	(7.4)
Repositioning expenses	(0.5)	(1.0)	(1.8)	(3.7)
Restructuring expenses and asset write offs	(6.5)	(0.4)	(14.1)	(3.5)
Third-party and other acquisition-related costs	(0.4)	(0.2)	(0.5)	(0.7)
Gain on Brazil tax recoveries	3.3	0.0	3.3	0.0
Net income attributable to noncontrolling interests	0.1	0.1	0.2	0.2
Interest expense, net	$ (5.4)	$ (4.7)	$ (10.8)	$ (9.8)