Accumulated Other Comprehensive (Loss) (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 225.2	$ 224.8	$ 651.1	$ 642.3
Net sales	334.9	335.9	936.6	934.0
Interest expense	9.0	11.3	43.4	33.9
Total (income) loss before tax	63.6	37.2	109.8	92.6
Tax impact	(7.7)	(17.5)	(44.4)	(52.1)
Selling, general and administrative expenses	$ 55.7	$ 64.0	165.2	189.9
Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period			27.2	25.0
Derivative Adjustments [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total (income) loss before tax			9.4	(3.6)
Tax impact			(3.3)	1.3
Total (income) loss, net of tax			6.1	(2.3)
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			1.2	3.5
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			(0.3)	(0.6)
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			(2.2)	(6.5)
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			0.5	0.8
Selling, general and administrative expenses			0.5	0.5
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			16.9	23.5
Selling, general and administrative expenses			14.5	17.2
Pension And Postretirement Adjustments [Member] | Reclassified From Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total expense before tax			32.4	42.0
Tax impact			(11.3)	(14.7)
Total expense, net of tax			$ 21.1	$ 27.3