Accumulated Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017		Sep. 30, 2016
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net sales		$ (398.2)	$ (376.7)	$ (1,183.5)		$ (1,126.8)
Cost of goods and services sold		(273.2)	(255.6)	(799.4)		(749.1)
Interest expense		(1.3)	(2.2)	(5.7)		(6.7)
Prior service cost		0.4	0.3	1.5		1.0
Actuarial losses		(0.3)	(1.0)	(1.6)		(2.6)
Income before income taxes		62.9	49.3	163.1		136.6
Tax expense (benefit)		(14.0)	(14.4)	(19.1)		(38.3)
Net income		51.0	37.6	150.7		104.5
Defined Benefit Plan, Amortization of Transition Asset (Obligation)						(0.1)
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net income		(1.0)	(0.8)	(2.0)		(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		(1.3)	(0.5)	(2.4)		(1.4)
Tax expense (benefit)		0.3	0.2	0.6		0.5
Net income		(1.0)	(0.3)	(1.8)		(0.9)
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]	0.4	0.3	1.5		1.0
Actuarial losses	[1]	(0.3)	(1.0)	(1.6)		(2.6)
Income before income taxes		0.1	(0.7)	(0.1)		(1.7)
Tax expense (benefit)		(0.1)	0.2	(0.1)		0.6
Net income		0.0	(0.5)	(0.2)		(1.1)
Defined Benefit Plan, Amortization of Transition Asset (Obligation)		0.0	0.0	0.0	[1]	(0.1)	[1]
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		(0.5)	0.0	(0.8)		0.0
Cost of goods and services sold		(0.5)	(0.1)	(0.6)		(0.2)
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		(0.2)	(0.3)	(0.7)		(1.0)
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)		$ (0.2)

[1] These components are included in the computation of net periodic benefit cost. Please refer to Note 10, Benefit Plans, for additional details.