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Stock Based Compensation Plans
6 Months Ended
Jun. 30, 2012
Stock Based Compensation Plans
6. Stock Based Compensation Plans

The following table provides a summary of option activity during the six months ended June 30, 2012:

 

     Options
(In millions)
    Weighted-
Average
Exercise
Price
     Weighted-
Average
Remaining
Contractual
Term
     Aggregate
Intrinsic
Value

(In  millions)
 

Outstanding at December 31, 2011

     8.3      $ 26.39         

Granted

     1.5        53.79         

Exercised

     (1.0     17.56         

Cancelled

     (0.1     32.54         
  

 

 

   

 

 

       

Outstanding at June 30, 2012

     8.7      $ 32.16         6.6       $ 202.8   
  

 

 

   

 

 

    

 

 

    

 

 

 

Exercisable at June 30, 2012

     4.8      $ 23.02         4.8       $ 157.3   
  

 

 

   

 

 

    

 

 

    

 

 

 

The following table provides information regarding the intrinsic value of stock options exercised and stock compensation expense related to stock option awards.

 

     Three Months Ended      Six Months Ended  
(In millions)    June 30,
2012
     July 1,
2011
     June 30,
2012
     July 1,
2011
 

Intrinsic Value of Stock Options Exercised

   $ 23.1       $ 14.7       $ 34.0       $ 23.9   

Stock Compensation Expense Related to Stock Option Awards

   $ 6.5       $ 5.9       $ 7.7       $ 7.5   

Issued Stock Options

     1.5         1.1         1.5         1.1   

Weighted Average Fair Value of Stock Options issued (per share)

   $ 8.93       $ 7.86       $ 8.92       $ 7.86   

Fair Value of Stock Options Issued

   $ 13.7       $ 8.9       $ 13.7       $ 8.9   

The following table provides a summary of the assumptions used in the valuation of issued stock options:

 

     Three Months Ended     Six Months Ended  
     June 30,     July 1,     June 30,     July 1,  
     2012     2011     2012     2011  

Risk-free interest rate

     1.0     2.0     1.0     2.1

Expected life in Years

     6.3        6.2        6.3        6.2   

Expected volatility

     20.7     21.0     20.7     21.0

Dividend Yield

     1.8     1.7     1.8     1.7

The fair value of stock options is based upon the Black Scholes option pricing model. The Company determined the options’ life based on historical exercise behavior and determined the options’ expected volatility and dividend yield based on the historical changes in stock price and dividend payments. The risk free interest rate is based on the yield of an applicable term Treasury instrument.