v3.26.1
Share Capital (Details)
₨ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2026
INR (₨)
shares
Mar. 31, 2026
USD ($)
shares
Mar. 31, 2025
INR (₨)
shares
Mar. 31, 2026
USD ($)
Disclosure of classes of share capital [line items]        
Opening number of equity shares/share capital ₨ 834      
Closing number of equity shares/share capital 835 $ 9 ₨ 834  
Treasury shares ₨ 1,815   ₨ 2,264 $ 19
Ordinary shares [member]        
Disclosure of classes of share capital [line items]        
Authorized share capital | shares     1,450,000,000  
Amount of shares authorised     ₨ 1,450  
Opening number of outstanding equity shares/share capital (face value of Rs.5 each) | shares 834,455,365 [1] 834,455,365 [1] 166,818,266  
Opening number of equity shares/share capital ₨ 834 [1]   ₨ 834  
Add: Equity shares issued pursuant to employee stock option plans prior to stock split | shares [2] 201,605 201,605 58,680  
Add: Equity shares issued pursuant to employee stock option plans prior to stock split [2] ₨ 1   ₨ 0 [3]  
Add: Increase in outstanding shares on account of stock split | shares [1]     667,507,784  
Add: Increase in outstanding shares on account of stock split [1]     ₨ 0  
Add: Equity shares issued pursuant to employee stock option plans after stock split | shares [2]     70,635  
Add: Equity shares issued pursuant to employee stock option plans after stock split [2],[3]     ₨ 0  
Closing number of equity shares/share capital | shares 834,656,970 834,656,970 834,455,365 [1]  
Closing number of equity shares/share capital ₨ 835   ₨ 834 [1]  
Treasury shares | shares [2] 1,965,575 1,965,575 2,452,260  
Treasury shares [2] ₨ 1,815   ₨ 2,264  
[1] Effective as of the record date of October 28, 2024, the Company implemented a sub-division/ stock split of each equity share having a face value of Rupees Five each, fully paid-up, into five equity shares having a face value of Rupees One each, fully paid-up (the “stock split”), by alteration of the capital clause of the Memorandum of Association of the Company. Each American Depositary Share (“ADS”) of the Company continued to represent one underlying equity share and, therefore, the number of ADSs held by an American Depositary Receipt (“ADR”) holder consequently increased in proportion to the increase in number of equity shares.
[2] Refer to Note 27 of these consolidated financial statements for further details regarding treasury shares and employee stock option plans.
[3] Rounded to the nearest million.