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Summary of Significant Accounting Policies (Schedule Of Property, Plant And Equipment) (Details)
12 Months Ended
Dec. 31, 2019
Machinery and equipment  
Property, Plant and Equipment [Line Items]  
Weighted Average Life 10 years
Buildings  
Property, Plant and Equipment [Line Items]  
Weighted Average Life 27 years
Other items  
Property, Plant and Equipment [Line Items]  
Weighted Average Life 10 years
Minimum | Machinery and equipment  
Property, Plant and Equipment [Line Items]  
Useful Life Range 3 years
Minimum | Buildings  
Property, Plant and Equipment [Line Items]  
Useful Life Range 5 years
Minimum | Other items  
Property, Plant and Equipment [Line Items]  
Useful Life Range 3 years
Maximum | Machinery and equipment  
Property, Plant and Equipment [Line Items]  
Useful Life Range 20 years
Maximum | Buildings  
Property, Plant and Equipment [Line Items]  
Useful Life Range 40 years
Maximum | Other items  
Property, Plant and Equipment [Line Items]  
Useful Life Range 15 years