Financial Instruments (Fair Value Measurement of Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Level 1 [Member] | Foreign Currency Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), net		$ (0.8)
Level 2 [Member] | Natural Gas Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), net		(0.6)
Level 2 [Member] | Interest Rate Swap Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), net	$ 3.5	$ 8.9