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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2011
Stock Based Compensation (Tables) [Abstract]  
Assumptions used in options-pricing model
                             
Year ended December 31,   2011     2010     2009      

Average option life

    6.2 years       6.1 years       6.0 years      

Future dividend yield

    .43     .48     .72    

Historical share price volatility

    .479       .473       .460      

Weighted-average risk-free interest rate

    2.6     2.2     3.0    
Activity, pricing and other information for stock options
                                     
     Number of
Options
   

Weighted-Average
Exercise Price

Per Option

    Weighted-Average
Remaining Life
(Years)
    Aggregate
Intrinsic
Value
    (a)

Outstanding at December 31, 2010

    32,982,923     $             22.97                      

Granted

    3,683,051       8.87                      

Exercised

    (121,089     5.55                      

Lapsed or canceled

    (3,612,267     26.27                      

Outstanding at December 31, 2011

    32,932,618     $ 21.12       5.0     $             8      
   

 

 

                             
                                     

Expected to vest

    5,747,983     $ 8.29       8.7     $ 2      

Exercisable at December 31, 2011

    26,456,386     $ 24.25       4.1     $ 7      

 

(a) The intrinsic value of a stock option is the amount by which the fair value of the underlying stock exceeds the exercise price of the option. At December 31, 2011, the fair value of the underlying stock was less than the weighted-average exercise price per option.
Activity and pricing information for nonvested shares in long term incentive compensation program
                                 
    Vesting Contingent on
Service Conditions
    Vesting Contingent on
Performance and

Service Conditions
 
    

Number of
Nonvested
Shares

 

   

Weighted-
Average
Grant-Date
Fair Value

 

   

Number of
Nonvested
Shares

 

   

Weighted-
Average
Grant-Date
Fair Value

 

 

Outstanding at December 31, 2010

    1,594,104     $   10.32       1,892,176     $   8.76  

Granted

    3,321,443       9.23       1,061,987       8.79  

Vested

    (359,472     22.58       (365,449     5.36  

Forfeited

 

   

 

(232,104

 

 

   

 

8.40

 

 

 

   

 

(1,526,727

 

 

   

 

8.76

 

 

 

Outstanding at December 31, 2011

    4,323,971     $ 8.57       1,061,987     $ 8.78  
   

 

 

           

 

 

         
                                 
Activity and pricing information for nonvested shares granted under Other Restricted Stock Awards
                     
     Number of
Nonvested
Shares
   

Weighted-Average
Grant-Date

Fair Value

     

Outstanding at December 31, 2010

    5,461,855     $             9.06      

Granted

    937,419       9.25      

Vested

    (2,540,615     11.30      

Forfeited

 

   

 

(171,875

 

 

   

 

8.71

 

 

 

   

Outstanding at December 31, 2011

    3,686,784     $ 7.58      
   

 

 

             
                     
Activity and pricing information for nonvested shares in deferred compensation plans
                     
     Number of
Nonvested
Shares
   

Weighted-Average
Grant-Date

Fair Value

     

Outstanding at December 31, 2010

    890,939     $             8.00      

Granted

    1,104,820       8.03      

Dividend equivalents

    52,724       7.29      

Vested

    (655,981     8.73      

Forfeited

 

   

 

(54,177

 

 

   

 

7.97

 

 

 

   

Outstanding at December 31, 2011

    1,338,325     $ 7.64