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Share-Based Compensation
 3 Months Ended
Mar. 31, 2013
Share-Based Compensation  
Share-Based Compensation

10.   Share-Based Compensation

        The Company's Net income (controlling interest) includes compensation expense of $5.0 million (net of income tax benefits of $3.1 million) and $5.5 million (net of income tax benefits of $3.4 million) for the three months ended March 31, 2012 and 2013, respectively, related to the Company's Stock Option and Incentive, Executive Incentive, Long-Term Equity Interests and Deferred Compensation Plans. As of March 31, 2013, the Company expects to recognize compensation expense related to these share-based compensation arrangements of $69.4 million over a weighted average period of approximately three years (assuming no forfeitures). As of March 31, 2013, no outstanding options have expiration dates prior to the end of 2013.

Stock Options

        The following table summarizes the transactions of the Company's stock options:

 
   Stock Options   Weighted Average
Exercise Price		   Weighted Average
Remaining
Contractual Life
(years)		  

Unexercised options outstanding—December 31, 2012

     3.8   $ 74.04        

Options exercised

     (0.5 )   65.30        
                   

Unexercised options outstanding—March 31, 2013

     3.3     75.25     4.0  
                   

Exercisable at March 31, 2013

     2.1     69.56     3.6  

Restricted Stock

        The following table summarizes the transactions of the Company's restricted stock:

 
   Restricted
Stock		   Weighted
Average
Grant Date
Value		  

Unvested units—December 31, 2012

     0.4   $ 84.53  

Units issued

     (0.1 )   85.63  
             

Unvested units—March 31, 2013

     0.3     84.49  
             

Long-Term Equity Interests Plan

        During the three months ended March 31, 2013, no awards were granted, forfeited or repurchased.