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Property, Plant, And Equipment, At Cost (Schedule Of Useful Lives Of Property, Plant, And Equipment) (Details)
12 Months Ended
Dec. 31, 2011
Land Improvements [Member]
 
Property, Plant, and Equipment [Line Items]  
Property, plant, and equipment, useful lives, minimum 5
Property, plant, and equipment, useful lives, maximum 30
Buildings [Member]
 
Property, Plant, and Equipment [Line Items]  
Property, plant, and equipment, useful lives, minimum 10
Property, plant, and equipment, useful lives, maximum 50
Machinery And Equipment [Member]
 
Property, Plant, and Equipment [Line Items]  
Property, plant, and equipment, useful lives, minimum 3
Property, plant, and equipment, useful lives, maximum 15