v3.25.2
Long-Term Debt - Scheduled Maturities of Long-Term Debt (Parenthetical) (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Debt Instrument [Line Items]      
Long-term debt ₨ 5,866,163.2 $ 68,666.3 ₨ 6,648,772.0
Perpetual debt      
Debt Instrument [Line Items]      
Long-term debt ₨ 137,564.2