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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Text block [abstract]  
Computation of Earnings Per Share
     Years Ended December 31  
     2016      2017      2018  
     (NT$)      (NT$)      (NT$)  

Basic EPS

    $ 12.79      $ 13.30      $ 14.00  
  

 

 

     

 

 

     

 

 

  

Diluted EPS

    $           12.79      $           13.30      $           14.00  
  

 

 

     

 

 

     

 

 

  

EPS is computed as follows:

 

    

Amounts
(Numerator)

NT$

(In Millions)

      Number of
Shares
(Denominator)
(In Millions)		      EPS (NT$)  

Year Ended December 31, 2016

                                                                                                

Basic/Diluted EPS

         

Net income available to common shareholders of the parent

    $ 331,713.7        25,930.3      $ 12.79  
  

 

 

     

 

 

     

 

 

  

Year Ended December 31, 2017

         

Basic/Diluted EPS

         

Net income available to common shareholders of the parent

    $ 344,998.3        25,930.3      $ 13.30  
  

 

 

     

 

 

     

 

 

  

Year Ended December 31, 2018

         

Basic/Diluted EPS

         

Net income available to common shareholders of the parent

    $ 363,052.7        25,930.3      $ 14.00