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Stock And Incentive Programs For Employees (Summary Of Stock Option Activity) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
years
Dec. 31, 2010
years
Dec. 31, 2009
Shares Under Option      
Outstanding at December 31, 2010 4,155,000    
Granted 200,000 540,000 1,520,468
Exercised (110,000)    
Cancelled / forfeited / expired (250,000)    
Outstanding at December 31, 2011 3,995,000 4,155,000  
Vested and expected to vest at December 31, 2011 3,995,000    
Exercisable at December 31, 2011 645,000    
Weighted Average Exercise Price      
Outstanding at December 31, 2010 $ 20.80    
Granted $ 18.62    
Exercised $ 9.37    
Cancelled / forfeited / expired $ 23.91    
Outstanding at December 31, 2011 $ 20.75 $ 20.80  
Vested and expected to vest at December 31, 2011 $ 20.75    
Exercisable at December 31, 2011 $ 7.09    
Weighted Average Remaining Contractual Term (years)      
Outstanding at December 31, 2010 6.3    
Granted 9.2    
Outstanding at December 31, 2011 5.9 6.3  
Vested and expected to vest at December 31, 2011 5.9    
Exercisable at December 31, 2011 7.2    
Aggregate Intrinsic Value      
Outstanding at December 31, 2010 $ 14.4    
Outstanding at December 31, 2011 9.5 14.4  
Vested and expected to vest at December 31, 2011 9.5    
Exercisable at December 31, 2011 $ 4.7