v3.26.1
Employees' Stock Option Plans (ESOP) - Additional Information (Details)
$ in Thousands, ₨ in Millions
 2 Months Ended 12 Months Ended
May 02, 2025
INR (₨)
shares
Installment
May 02, 2025
USD ($)
shares
Installment
Jun. 22, 2019
shares
Mar. 31, 2016
shares
Mar. 31, 2026
USD ($)
shares
Mar. 31, 2026
INR (₨)
shares
Mar. 31, 2026
USD ($)
shares
Mar. 31, 2025
USD ($)
shares
Mar. 31, 2024
shares
Mar. 31, 2023
shares
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Number of shares authorized         4,800,000,000   4,800,000,000 4,800,000,000    
Number of shares outstanding         4,046,940,812   4,046,940,812 4,143,607,528    
Treasury shares         8,650,911   8,650,911 9,655,927 10,916,829 12,172,119
Carrying value of liability towards cash settled share based payments | $         $ 2,000   $ 2,000 $ 2,000    
2019 Stock Ownership Program | Annual Grant Performance Based Restricted Stock Units (RSUs) | Chief Executive Officer and Managing Director                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Total granted 66,366 66,366                
Fair value of instruments eligibility for one time equity grants           ₨ 100.0 $ 1,170      
2019 Stock Ownership Program | Annual Grant Performance Based Restricted Stock Units (RSUs) | Other KMPs                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Vesting period           3 years 3 years      
Total granted           58,150 58,150      
2019 Stock Ownership Program | Top of Range                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Number of shares authorized     50,000,000              
Shares issued by secondary acquisition of shares     45,000,000              
Vesting period           3 years 3 years      
2019 Stock Ownership Program | Bottom of Range                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Vesting period           1 year 1 year      
2015 Stock Incentive Compensation Plan                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Instruments average vesting period       4 years            
Treasury shares         8,650,911   8,650,911 9,655,927    
Number of shares earmarked for welfare activities of the employees         200,000   200,000 200,000    
2015 Stock Incentive Compensation Plan | Annual Performance Equity Grant | Chief Executive Officer and Managing Director                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Fair value of instruments annual grant performance based RSU ₨ 347.5 $ 4,070                
Total granted 230,621 230,621                
2015 Stock Incentive Compensation Plan | Annual Performance Equity ESG Grant | Chief Executive Officer and Managing Director                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Fair value of instruments annual grant performance based RSU ₨ 20.0 $ 230                
Total granted 13,273 13,273                
2015 Stock Incentive Compensation Plan | Annual Performance Equity TSR Grant | Chief Executive Officer and Managing Director                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Fair value of instruments annual grant performance based RSU ₨ 50.0 $ 590                
Total granted 33,183 33,183                
2015 Stock Incentive Compensation Plan | Time Based Restricted Stock Units (RSUs) | Chief Executive Officer and Managing Director                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Total granted         18,132          
Fair value of instruments eligibility annual equity grants ₨ 30.0 $ 330                
Number of annual installments | Installment 3 3                
Description of vesting requirements for share-based payment arrangement will vest overtime in three equal annual installments upon the completion of each year of service from the respective grant date. will vest overtime in three equal annual installments upon the completion of each year of service from the respective grant date.                
2015 Stock Incentive Compensation Plan | Time Based Restricted Stock Units (RSUs) | Other KMPs                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Vesting period           4 years 4 years      
Total granted           82,400 82,400      
Description of vesting requirements for share-based payment arrangement           Time based RSUs will vest over four years. Time based RSUs will vest over four years.      
2015 Stock Incentive Compensation Plan | Restricted Stock Units and Employee Stock Option Plan                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Description of vesting requirements for share-based payment arrangement       will generally vest over a period of 4 years            
2015 Stock Incentive Compensation Plan | Top of Range                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Number of shares authorized       24,038,883            
2011 Restricted Stock Units Plan                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Number of shares outstanding       11,223,576            
Incentive Units Cash Settled | Annual Grant of Restricted Stock Units (RSUs)                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
cash settled options outstanding (net of forfeitures)         387,949   387,949 288,384    
2015 Plan Employee Stock Options (ESOPs) | Time Based Grant ESOPs | Other KMPs                    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]                    
Vesting period           4 years 4 years      
Total granted           231,270 231,270      
Description of vesting requirements for share-based payment arrangement           ESOPs will vest over a period of 4 years ESOPs will vest over a period of 4 years