Financial Instruments (Summary Of Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	$ (1,057.7)	$ (1,065.2)
Foreign currency contract obligations	0.2	5.2
Natural gas contracts		0.5
Interest rate swap contracts	11.3	(7.9)
Quoted, Active Markets Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	(469.1)	(470.9)
Foreign currency contract obligations	0.2	5.2
Other Observable Inputs Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	(588.6)	(594.3)
Natural gas contracts		0.5
Interest rate swap contracts	$ 11.3	$ (7.9)