v3.25.1
Share-Based Compensation (RSUs Activity) (Details) - RSUs [Member]
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 31, 2025
₨ / shares
Mar. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2024
₨ / shares
Mar. 31, 2024
USD ($)
shares
Mar. 31, 2023
₨ / shares
Mar. 31, 2023
USD ($)
shares
Number of RSUs            
Outstanding, beginning of period (shares) | shares   6,061,558        
Granted (shares) | shares   1,714,753   1,975,035   4,426,815
Exercised (shares) | shares   (1,739,804)        
Forteited/Cancelled (shares) | shares   (206,799)        
Outstanding, end of period (shares) | shares   5,829,708   6,061,558    
Grant Date Fair Value            
Outstanding, beginning of period (Indian Rupees per share) | ₨ / shares ₨ 411.21          
Granted (Indian Rupees per share) | ₨ / shares 681.40   ₨ 417.90   ₨ 411.08  
Exercised (Indian Rupees per share) | ₨ / shares 406.51          
Forfeited/Cancelled (Indian Rupees per share) | ₨ / shares 465.81          
Outstanding, end of period (Indian Rupees per share) | ₨ / shares ₨ 490.15   ₨ 411.21      
Aggregate Intrinsic Value            
Outstanding, end of period | $   $ 43        
Granted | $   14        
Exercised | $   $ 15   $ 13   $ 15
Forfeited/Cancelled | $ / shares   $ 0        
Outstanding, beginning of period | $   $ 50   $ 43