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Related Party Relationships and Transactions - Summary of Related Party Transactions (Parenthetical) (Detail) - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of transactions between related parties [line items]      
Share based compensation [1] ₨ 5,542 ₨ 5,590 ₨ 3,958
Other benefits [member]      
Disclosure of transactions between related parties [line items]      
Share based compensation 277 ₨ 575 ₨ 292
Thierry Delaporte [member]      
Disclosure of transactions between related parties [line items]      
Cash compensation 415    
Cost of accelerated vesting towards unvested stock options 310    
Social security contributions ₨ 196    
[1] Includes ₹ (11), ₹ 6 and ₹ (9) for the years ended March 31, 2023, 2024 and 2025, respectively, towards cash settled ADS RSUs.