Accumulated Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net sales		$ 456.1			$ 431.7			$ 1,369.3	$ 1,294.9
Cost of goods and services sold		(308.3)			(296.1)			(916.8)	(882.7)
Interest expense		(2.1)			(2.0)			(6.4)	(6.1)
Prior service cost		0.1			0.5			0.4	1.6
Actuarial losses		0.2			(0.2)			0.2	(1.0)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(2.7)			0.0			(2.7)	0.0
Income before income taxes		64.9			61.1			214.4	174.9
Tax expense (benefit)		(10.9)			(8.0)			(42.5)	(26.5)
Net income		56.3	$ 66.1	$ 55.4	55.2	$ 56.1	$ 43.6	177.8	154.9
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net income		(4.3)			0.3			2.7	(0.9)
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		(3.8)			0.0			6.3	(1.8)
Tax expense (benefit)		1.3			0.0			(2.0)	0.4
Net income		(2.5)			0.0			4.3	(1.4)
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]	0.1			0.5			0.4	1.6
Actuarial losses	[1]	0.2			(0.2)			0.2	(1.0)
Income before income taxes		(2.4)			0.3			(2.1)	0.6
Tax expense (benefit)		0.6			0.0			0.5	(0.1)
Net income		(1.8)			0.3			(1.6)	0.5
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		0.3			0.1			0.8	(0.8)
Cost of goods and services sold		0.3			0.0			0.8	(0.7)
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		(4.3)			0.0			5.0	0.0
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 14, Benefit Plans, for additional details.