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Goodwill and Intangible Assets - Summary of Movement in Intangible Assets (Parenthetical) (Detail) - Intangible assets [member] - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disclosure of detailed information about intangible assets [line items]    
Impairment related to intangible recognized on acquisition ₨ 1,701 ₨ 1,816
Measurement period adjustment   ₨ 36
Change in estimate of useful life of customer-related intangibles in an earlier business combination ₨ 2,807