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Share-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2011
Share-Based Compensation  
Black-Scholes-Merton Option Pricing Model
     2011     2010  

Expected volatility

     36.69     35.61

Risk-free interest rate

     2.54     2.75

Expected life (years)

     6.25        6.25   

Expected dividend yield

     4.57     4.19
Summary Of Stock Option Activity
     Shares
Under
Option
(thousands)
    Weighted
Average
Exercise
Price
     Weighted
Average
Remaining
Contractual
Term
(years)
     Aggregate
Intrinsic Value
(millions)
 

Outstanding at December 31, 2010

     4,155      $ 20.80         6.3       $ 14.4   

Granted

     200        18.62         9.7      

Exercised

     (108     9.25         

Cancelled/forfeited/expired

     (202     24.96         
                

Outstanding at June 30, 2011

     4,045        20.73         6.3       $ 16.9   
                

Exercisable at June 30, 2011

     1,056      $ 11.48         5.3       $ 8.6   
Nonvested Restricted Stock Unit Awards
     Shares
(thousands)
    Weighted Average Grant
Date Fair Value
 

Nonvested at December 31, 2010

     5,430      $ 12.96   

Granted

     1,524        16.37   

Vested

     (1,858     12.93   

Forfeited

     (49     15.42   
          

Nonvested at June 30, 2011

     5,047      $ 13.97