v3.25.2
Stock - Activity in the RSU's outstanding under the various Employees' Stock Incentive Master Scheme (Detail) - Restricted Stock Units (RSUs) [Member] - ₨ / shares
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Schedule of Restricted Stock Shares Activity [Line Items]      
Weighted average fair value of RSUs granted during the year ₨ 1 ₨ 1  
Employee Stock Incentive Master Scheme Two Thousand And Twenty Two [Member]      
Schedule of Restricted Stock Shares Activity [Line Items]      
RSUs outstanding, beginning of period 11,721,804 2,891,000 0
Granted 6,254,575 9,354,224 2,891,000
Exercised (2,355,965) (316,620) 0
Forfeited (683,831) (203,500) 0
Lapsed (51,155) (3,300) 0
RSUs outstanding, end of period 14,885,428 11,721,804 2,891,000
RSUs exercisable, end of period 1,207,198 376,070 0
RSUs outstanding, beginning of period ₨ 1 ₨ 1 ₨ 0
Granted 1 1 1
Exercised 1 1 0
Forfeited 1 1 0
Lapsed 1 1 0
RSUs outstanding, end of period 1 1 1
RSUs exercisable, end of period 1 1
Weighted average fair value of RSUs granted during the year ₨ 1,724.68 ₨ 1,565.43 ₨ 1,382.34