Segment Information Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment income	$ 111.1	$ 133.8	$ 211.8	$ 201.4
Restructuring and other	(1.1)	(6.7)	(3.8)	(7.8)
Intangible amortization	(7.0)	(8.3)	(14.6)	(16.5)
Asset impairment		(2.9)	0.0	(18.2)
(Loss) gain on sale of businesses	(0.1)	(0.1)	(0.1)	3.4
Income from continuing operations before income taxes	103.6	137.2	196.2	200.4
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment income	124.7	154.1	236.2	252.8
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Deal-related costs and expenses	0.0	0.0	(0.4)	(4.2)
Inventory step-up	0.0	(0.5)	0.0	(2.2)
Restructuring and other	(1.1)	(6.7)	(3.5)	(7.8)
Intangible amortization	(7.0)	(8.3)	(14.6)	(16.5)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	0.0	12.2	0.0	12.2
Asset impairment	0.0	(2.9)	0.0	(18.2)
(Loss) gain on sale of businesses	(0.1)	(0.1)	(0.1)	3.4
COVID-19 related costs and expenses	(4.8)	0.0	(5.7)	0.0
Net interest expense	(7.7)	(9.4)	(14.6)	(16.7)
Other expense	$ (0.4)	$ (1.2)	$ (1.1)	$ (2.4)

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