Operating Segment and Geographic Information - Reconciliation of Segment Data to Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Operating income		$ 36.5	$ 42.5	$ 60.3
Corporate costs	$ (65.7)	(71.4)	(133.8)	(140.4)
Repositioning expenses	(1.0)	(5.8)	(3.7)	(11.2)
Restructuring expenses and asset impairments	(0.4)	(4.4)	(3.5)	(5.0)
Net income attributable to noncontrolling interests	0.1	0.0	0.2	0.2
Income from continuing operations before income taxes	3.3	8.8	2.9	7.2
Corporate
Segment Reporting Information [Line Items]
Corporate costs	(6.3)	(9.4)	(12.1)	(19.3)
Restructuring expenses and asset impairments	0.0	0.1	0.0	0.1
Segment Reconciling Items
Segment Reporting Information [Line Items]
Certain pension costs	(1.3)	(2.0)	(2.6)	(3.9)
Shareholder activism and other related costs	(3.8)	(1.1)	(7.4)	(3.6)
Repositioning expenses	(1.0)	(5.8)	(3.7)	(11.2)
Restructuring expenses and asset impairments	(0.4)	(4.4)	(3.5)	(5.0)
Third-party and other acquisition-related costs	(0.2)	0.0	(0.7)	(0.1)
Legacy product, environmental and other claims	0.0	(0.1)	0.0	(0.1)
Net income attributable to noncontrolling interests	0.1	0.0	0.2	0.2
Interest expense, net	(4.7)	(4.9)	(9.8)	(10.1)
Operating Segments
Segment Reporting Information [Line Items]
Operating income	$ 20.9	$ 36.5	$ 42.5	$ 60.3