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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2011
Stock-Based Compensation [Abstract]  
Summary Of Nonvested Shares Related To Long-Term Incentive Plan
                                 
     Performance Share  Units(a)      Restricted Shares(b)  
     Share Units      Weighted-average
Fair Value per Unit		      Shares     Weighted-average
Fair Value per Share		  

Nonvested at January 1, 2011

      1,142,768       $ 23.96         83,154      $ 49.87   

Granted(c )

     731,962         31.41         —          —     

Dividends

      —           —           1,005        30.04   

Unearned or forfeited(d )

     (565,538)         16.28         (560 )      50.45   

Earned and vested(e )

     (152,361)         29.47         (83,599 )      49.89   
    

 

 

     

 

 

     

 

 

    

 

 

  

Nonvested at December 31, 2011

      1,156,831       $ 31.70         —        $ —     
    

 

 

     

 

 

     

 

 

    

 

 

  

 

(a) Granted under the 2006 Plan.
(b) Granted under the 1998 Plan.
(c) Includes performance share units (share units) granted to certain executive and nonexecutive officers and other eligible employees in January 2011 under the 2006 Plan.
(d) Includes share units granted in 2009 that were not earned based on performance provisions of the award grants.
(e)

Includes share units granted in 2009 that vested as of December 31, 2011, that were earned pursuant to the provisions of the award grants. Also includes share units that vested due to attainment of retirement eligibility by certain employees. Actual shares issued for retirement-eligible employees will vary depending on actual performance over the three-year measurement period.