Derivative Financial Instruments (Summary of Fair Value of Derivative Instruments on Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 0.6	$ 3.4
Derivative Liabilities, Fair Value	4.4	11.5
Other Current Assets [Member] | Natural Gas Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	0.1
Other Current Assets [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	0.5	3.4
Accounts Payable And Accrued Expenses [Member] | Natural Gas Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value		0.8
Accounts Payable And Accrued Expenses [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value	0.2	0.1
Other Long-Term Liabilities [Member] | Interest Rate Swap Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value	$ 4.2	$ 10.6