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Share-Based Compensation (Summary Of Nonvested Stock Activity) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 10.5    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 263 days    
Nonvested Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Awards, Outstanding at December 31, 2012 817,319    
Number of Awards, Awarded - Employees 294,997    
Number of Awards, Awarded - Directors 28,900    
Number of Awards, Vested (275,257)    
Number of Awards, Forfeited (42,889)    
Number of Awards, Outstanding at December 31, 2013 823,070 817,319  
Weighted- Average Grant-Date Fair Value, Outstanding at December 31, 2012 $ 31.25    
Weighted- Average Grant-Date Fair Value, Vested $ 30.88    
Weighted- Average Grant-Date Fair Value, Forfeited $ 31.83    
Weighted- Average Grant-Date Fair Value, Outstanding at December 31, 2013 $ 32.15 $ 31.25  
Fair value of stock which vested in the period 9.4 11.0 5.4
Employees [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-Average Grant-Date Fair Value, Awarded $ 33.19 $ 30.37 $ 32.41
Directors [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-Average Grant-Date Fair Value, Awarded $ 34.60 $ 33.75 $ 38.11
PerformanceSharePlanUntis [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Awards, Outstanding at December 31, 2012 235,984    
Number of awards, Awarded 229,093    
Number of Awards, Forfeited (28,062)    
Number of Awards, Outstanding at December 31, 2013 437,015 235,984  
Weighted- Average Grant-Date Fair Value, Outstanding at December 31, 2012 $ 29.67    
Weighted-Average Grant-Date Fair Value, Awarded $ 32.41 $ 29.67  
Weighted- Average Grant-Date Fair Value, Forfeited $ 31.02    
Weighted- Average Grant-Date Fair Value, Outstanding at December 31, 2013 $ 31.02 $ 29.67  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 8.2    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 285 days    
Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of grant target award recipients receive depending on performance criteria 0.00%    
Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of grant target award recipients receive depending on performance criteria 200.00%