Accumulated Other Comprehensive Income (Loss) (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 156.5	$ 141.5
Net sales	227.3	219.8
Interest expense	9.2	8.9
Total loss (income) from continuing operations, before tax	(49.4)	(57.3)
Tax impact	8.2	21.8
Other non-operating (income) expense, net	9.0	8.9
Total reclassifications for the period	3.7	2.4
Derivative Adjustments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	0.9	(0.2)
Derivative Adjustments [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total loss (income) from continuing operations, before tax	1.2	(0.3)
Tax impact	(0.3)	0.1
Total loss (income) from continuing operations, net of tax	0.9	(0.2)
Derivative Adjustments [Member] | Natural Gas Commodity Contracts [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	0.4	(0.1)
Derivative Adjustments [Member] | Foreign Exchange Contracts - Purchases [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	0.1
Derivative Adjustments [Member] | Foreign Exchange Contracts - Sales [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net sales	0.2	(0.2)
Derivative Adjustments [Member] | Interest Rate Swap Contracts [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	0.5
Prior Service Cost Amortization [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other non-operating (income) expense, net		0.4
Amortization Of Net Actuarial Loss [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other non-operating (income) expense, net	3.6	3.6
Pension And Postretirement Adjustments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	2.8	2.6
Pension And Postretirement Adjustments [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total expense from continuing operations, before tax	3.6	4.0
Tax impact	(0.8)	(1.4)
Total expense, net of tax	$ 2.8	$ 2.6