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Acquisitions (Schedule Of Acquired Other Identifiable Intangible Assets) (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 17, 2015
Aug. 01, 2014
Dec. 31, 2015
Dec. 31, 2014
Intangible assets acquired     $ 9.6 $ 46.3
Customer relationships        
Intangible assets acquired     $ 4.1 $ 28.0
Weighted average useful life     14 years  
Farmer Automatic        
Intangible assets acquired $ 9.6      
Farmer Automatic | Customer relationships        
Intangible assets acquired $ 4.1      
Weighted average useful life 10 years      
Farmer Automatic | Technology        
Intangible assets acquired $ 3.6      
Weighted average useful life 10 years      
Farmer Automatic | Trademarks        
Intangible assets acquired $ 1.9      
Weighted average useful life 10 years      
Intersystems Holdings, Inc.        
Intangible assets acquired   $ 46.3    
Intersystems Holdings, Inc. | Customer relationships        
Intangible assets acquired   $ 28.0    
Weighted average useful life   15 years    
Intersystems Holdings, Inc. | Technology        
Intangible assets acquired   $ 11.3    
Weighted average useful life   15 years    
Intersystems Holdings, Inc. | Trademarks        
Intangible assets acquired   $ 7.0    
Weighted average useful life   16 years