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Earnings per equity share (Tables)
 12 Months Ended
Mar. 31, 2019
Text block [abstract]  
Summary of Earnings Per Equity Share
Year ended March 31,  
     2017      2018      2019  

Profit attributable to equity holders of the Company

    ₹  84,895      ₹  80,081      ₹  90,031  

Weighted average number of equity shares outstanding

      6,476,108,013        6,333,391,200        6,007,376,837  
  

 

 

     

 

 

     

 

 

  

Basic earnings per share

    ₹  13.11      ₹  12.64      ₹  14.99  
  

 

 

     

 

 

     

 

 

  
    Year ended March 31,  
    2017     2018     2019  

Profit attributable to equity holders of the Company

   ₹  84,895     ₹  80,081     ₹  90,031  

Weighted average number of equity shares outstanding

     6,476,108,013       6,333,391,200       6,007,376,837  

Effect of dilutive equivalent share options

     19,021,504       11,091,433       14,927,530  
 

 

 

    

 

 

    

 

 

  

Weighted average number of equity shares for diluted earnings per share

     6,495,129,517       6,344,482,633       6,022,304,367  
 

 

 

    

 

 

    

 

 

  

Diluted earnings per share

   ₹  13.07     ₹  12.62     ₹  14.95