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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2012
Stock-Based Compensation Cost and Associated Tax Benefit

Presented below is a summary of the stock-based compensation cost and associated tax benefit included in the accompanying consolidated statements of operations:

 

     Three Months Ended      Nine Months Ended  
     September 30,      September 30,  
     2012      2011      2012      2011  

Stock-based compensation cost

   $ 16.4      $ 12.9      $ 46.3      $ 43.2  

Tax benefit

   $ 5.9      $ 5.0      $ 16.7      $ 16.2  
Weighted Average Assumptions used in Determining Fair Value for Options Granted

The following weighted average assumptions were used in determining the fair value for options granted in 2012:

 

Expected dividend yield

     1.66

Expected stock volatility

     44

Risk-free interest rate

     1.55

Expected holding period

     7.4 yrs   

Grant date fair value

   $ 15.19   
Stock Option Exercises and Restricted Stock Vesting

The following tables summarize information relating to stock option exercises and restricted stock vesting:

 

     Nine Months Ended  
     September 30,  
Stock option exercises:    2012      2011  

Proceeds from stock option exercises

   $ 83.2      $ 41.5  

Aggregate intrinsic value

   $ 41.4      $ 20.4  

Tax benefit realized upon exercise

   $ 15.7      $ 8.0  

 

     Nine Months Ended  
     September 30,  
Restricted stock vesting:    2012      2011  

Fair value of shares vested

   $ 37.7      $ 18.8  

Tax benefit realized upon vesting

   $ 13.3      $ 7.0