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 From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
Net sales	$ 950.5	$ 907.4	$ 2,751.1	$ 2,651.0
Cost of goods sold	(643.6)	(618.7)	(1,887.7)	(1,808.9)
Income before income taxes	123.6	124.1	331.2	332.5
Tax (expense) benefit	(40.8)	(36.0)	(103.7)	(100.4)
(Loss) gain net of tax	(2.2)	(2.4)	(5.9)	(6.1)
Cash flow hedge loss
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
(Loss) gain net of tax			(0.4)
Amortization of prior-service costs
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
Reclassification from accumulated other comprehensive income, before tax	0.3	0.2	0.7	0.6
Amortization of actuarial gains/(losses)
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
Reclassification from accumulated other comprehensive income, before tax	(3.0)	(3.4)	(8.5)	(10.4)
Settlement and curtailment losses
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
Reclassification from accumulated other comprehensive income, before tax	0.0	0.0	(0.5)	0.0
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
Reclassification from accumulated other comprehensive income, before tax	(2.7)	(3.2)	(8.3)	(9.8)
Reclassification from AOCI, current period, tax	0.9	1.1	2.8	3.6
(Loss) gain net of tax	(1.8)	(2.1)	(5.5)	(6.2)
Forward Contracts \| Cash flow hedge loss \| Reclassification out of Accumulated Other Comprehensive Income
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax [Abstract]
Net sales	(0.2)	0.0	(0.2)	(0.2)
Cost of goods sold	(0.4)	(0.4)	(0.4)	0.3
Income before income taxes	(0.6)	(0.4)	(0.6)	0.1
Tax (expense) benefit	0.2	0.1	0.2	0.0
Gain (loss) net of tax	$ (0.4)	$ (0.3)	$ (0.4)	$ 0.1

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
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