Accumulated Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net Sales		$ 431.7	$ 398.2	$ 1,294.9	$ 1,183.5
Cost of goods and services sold		(296.1)	(273.1)	(882.7)	(799.2)
Interest expense		(2.0)	(1.4)	(6.1)	(5.7)
Prior service cost		0.5	0.4	1.6	1.5
Actuarial losses		(0.2)	(0.3)	(1.0)	(1.6)
Income before income taxes		61.1	62.9	174.9	163.1
Tax expense (benefit)		(8.0)	(14.0)	(26.5)	(19.1)
Net income		55.2	51.0	154.9	150.7
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net income		0.3	(1.0)	(0.9)	(2.0)
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Gains (Losses) on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Income before income taxes		0.0	(1.3)	(1.8)	(2.4)
Tax expense (benefit)		0.0	0.3	0.4	0.6
Net income		0.0	(1.0)	(1.4)	(1.8)
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Defined Benefit Pension and Other Postretirement Plans [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Prior service cost	[1]	0.5	0.4	1.6	1.5
Actuarial losses	[1]	(0.2)	(0.3)	(1.0)	(1.6)
Income before income taxes		0.3	0.1	0.6	(0.1)
Tax expense (benefit)		0.0	(0.1)	(0.1)	(0.1)
Net income		0.3	0.0	0.5	(0.2)
Foreign Currency Contract [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Gains (Losses) on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net Sales		0.1	(0.5)	(0.8)	(0.8)
Cost of goods and services sold		0.0	(0.5)	(0.7)	(0.6)
Interest Rate Swap Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Gains (Losses) on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Interest expense		0.0	(0.2)	0.0	(0.7)
Forward Treasury Locks [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Gains (Losses) on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Interest expense		$ (0.1)	$ (0.1)	$ (0.3)	$ (0.3)

[1] These components are included in the computation of net periodic benefit cost. Please refer to Note 11, Benefit Plans, for additional details.