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Long-Term Compensation (Tables)
12 Months Ended
Dec. 31, 2011
Class of Stock [Line Items]  
Share option activity
                                         
    Options Outstanding     Options Exercisable  

  

  Number of Options     Weighted
Average
Exercise Price
    Number of
Options
    Weighted
Average Exercise
Price
    Weighted
Average Life
(in years)
 

Balance at January 1, 2011

    1,438,514     $ 66.89                          

Options acquired in Merger

    9,052,566       30.66                          

Settled

    (124,278)       71.64                          

Exercised

    (249,813)       22.01                          

Forfeited/Expired

    (237,029)       59.88                          
   

 

 

   

 

 

                         

Balance at December 31, 2011

    9,879,960      $                 34.93       8,239,656     $                 37.13       4.4  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
     

Expected volatility

  25-55%

Weighted average volatility

  45.8%

Expected dividends

  3.73%

Expected term (in years)

  1-6

Risk-free rate

  0.19-1.92%
Restricted Stock [Member]
 
Class of Stock [Line Items]  
Non-vested share options
                 
    

Number of

Shares

    Weighted Average
Grant-Date Fair Value
 

Balance at January 1, 2011

        $  

Awards acquired in Merger

    1,228,944       34.07  

Granted

    15,500       33.82  

Vested

    (44,060)       34.07  

Forfeited

    (7,402)       34.07  
   

 

 

   

 

 

 

Balance at December 31, 2011

                         1,192,982     $                      34.07  
Rsu and Psa [Member]
 
Class of Stock [Line Items]  
Non-vested share options
                         
    

Number of

Shares

    Weighted Average
Grant-Date Fair Value
    Number of
Shares Vested
 

Balance at January 1, 2011

    1,863,420     $ 31.00                           87,935  
                   

 

 

 

Awards acquired in Merger

    89,864       34.07          

Granted

    1,027,960       34.13          

Settled

    (149,053)       58.51          

Distributed

    (976,185)       29.66          

Forfeited

    (171,293)       58.29          
   

 

 

   

 

 

         

Balance at December 31, 2011

                         1,684,713     $                          30.43       48,735