Accumulated Other Comprehensive (Loss) (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 216.1	$ 203.1
Net sales	315.4	287.4
Interest expense	9.2	21.9
Total (income) loss from continuing operations, before tax	(55.4)	(4.9)
Tax impact	24.6	12.0
Total (income) from discontinued operations, net of tax	0.4	2.8
Total (income) loss, net of tax	(30.4)	9.9
Total expense from discontinued operations, net of tax		(4.5)
Selling, general and administrative expenses	54.6	53.7
Total reclassifications for the period	2.4	14.1
Derivative Adjustments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	(0.2)	6.0
Derivative Adjustments [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total (income) loss from continuing operations, before tax	(0.3)	10.2
Tax impact	0.1	(3.6)
Total (income) loss from continuing operations, net of tax	(0.2)	6.6
Total (income) from discontinued operations, net of tax		(0.6)
Total (income) loss, net of tax	(0.2)	6.0
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	(0.1)	0.8
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		(0.5)
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)	(0.8)
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		10.7
Prior Service Cost Amortization [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	0.2	0.1
Selling, general and administrative expenses	0.2	0.1
Amortization Of Net Actuarial Loss [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	1.8	4.6
Selling, general and administrative expenses	1.8	3.1
Pension And Postretirement Adjustments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	2.6	8.1
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	4.0	7.9
Tax impact	(1.4)	(2.7)
Total expense from continuing operations, net of tax	2.6	5.2
Total expense from discontinued operations, net of tax		2.9
Total expense, net of tax	$ 2.6	$ 8.1