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Earnings Per Share (Tables)
 3 Months Ended
Mar. 30, 2013
Basic and Diluted Earnings Per Share

Basic and diluted earnings per share were calculated as follows:

 

                                                             
         Three months ended      
  

 

 

  
In millions, except per-share data   

    March 30,    

2013  

     

    March 31,    

2012  

  

 

  

Net income attributable to Pentair Ltd.

    $ 52      $ 62   

 

  

Weighted average common shares outstanding

      

Basic

      204.8        98.6   

Dilutive impact of stock options and restricted stock units (1)

      3.4        1.8   

 

  

Diluted

      208.2        100.4   

 

  

Earnings per common share attributable to Pentair Ltd.

      

Basic earnings per common share

    $ 0.25      $ 0.63   

Diluted earnings per common share

    $ 0.25      $ 0.62   

 

  

Anti-dilutive stock options and restricted stock units (2)

      1.0        2.5   

 

  

 

(1) The incremental share impact from stock options and restricted stock units was computed using the treasury stock method.

 

(2) Stock options and restricted stock units that were not dilutive were excluded from our calculation of diluted weighted average shares.