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Stock-Based Compensation (Summary Of Status Of RSU And DSU Grants) (Details) (Restricted Stock And Deferred Stock Units (RSUs And DSUs) [Member], USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Restricted Stock And Deferred Stock Units (RSUs And DSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Units, RSUs and DSUs 2.8 2.5
Weighted Average Grant Date Fair Value, RSUs and DSUs $ 30.71 $ 34.85
Weighted Average Remaining Contractual Life, RSUs and DSUs 1 year 7 months 6 days 1 year 8 months 12 days
Aggregate Intrinsic Value, RSUs and DSUs $ 100.5 $ 57.4
Units, Granted 1.3  
Weighted Average Grant Date Fair Value, Granted $ 23.26  
Units, Vested (0.8)  
Weighted Average Grant Date Fair Value, Vested $ 32.00  
Units, Forfeited or canceled (0.2)  
Weighted Average Grant Date Fair Value, Forfeited or canceled $ 32.05