Accumulated Other Comprehensive (Loss) (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 222.8	$ 214.6	$ 425.9	$ 417.5
Net sales	314.3	306.1	601.7	598.1
Interest expense	12.5	11.4	34.4	22.6
Total (loss) income before tax	41.3	33.0	46.2	55.4
Tax impact	(24.7)	(17.9)	(36.7)	(34.6)
Selling, general and administrative expenses	$ 55.8	$ 61.6	109.5	125.9
Total reclassifications for the period			20.0	17.1
Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period			20.0	17.1
Derivative Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period			6.1	(1.0)
Derivative Adjustments [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total (loss) income before tax			9.4	(1.6)
Tax impact			(3.3)	0.6
Total income (loss), net of tax			6.1	(1.0)
Derivative Adjustments [Member] | Natural Gas Commodity Contracts [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold			1.3	2.6
Derivative Adjustments [Member] | Foreign Exchange Contracts - Purchases [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold			(0.5)	(0.2)
Derivative Adjustments [Member] | Foreign Exchange Contracts - Sales [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales			(2.1)	(4.0)
Derivative Adjustments [Member] | Interest Rate Swap Contracts [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense			10.7
Pension And Postretirement Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period			13.9	18.1
Pension And Postretirement Adjustments [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total expense before tax			21.4	27.8
Tax impact			(7.5)	(9.7)
Total expense, net of tax			13.9	18.1
Pension And Postretirement Adjustments [Member] | Reclassification From Accumulated Other Comprehensive Income [Member] | Prior Service Cost Amortization
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold			0.3	0.4
Selling, general and administrative expenses			0.3	0.4
Pension And Postretirement Adjustments [Member] | Reclassification From Accumulated Other Comprehensive Income [Member] | Amortization Of Net Actuarial Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold			11.0	14.2
Selling, general and administrative expenses			$ 9.8	$ 12.8