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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, 2024
Mar. 31, 2023
Schedule of Restricted Stock Shares Activity [Line Items]    
Weighted average fair value of RSUs granted during the year ₨ 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 2,891,000 0
Granted 9,354,224 2,891,000
Exercised (316,620) 0
Forfeited (203,500) 0
Lapsed (3,300) 0
RSUs outstanding, end of period 11,721,804 2,891,000
RSUs exercisable, end of period 376,070 0
RSUs outstanding, beginning of period ₨ 1 ₨ 0
Granted 1 1
Exercised 1 0
Forfeited 1 0
Lapsed 1  
RSUs outstanding, end of period 1 1
RSUs exercisable, end of period 1  
Weighted average fair value of RSUs granted during the year ₨ 1,565.43 ₨ 1,382.34