Related party transactions - Balances Receivable from Related Parties (Detail) ₨ in Millions, $ in Millions |
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2025
USD ($)
|
Mar. 31, 2024
INR (₨)
|
|---|---|---|---|
| Related Party Transaction [Line Items] | |||
| Total | ₨ 131,414.7 | $ 1,538.3 | ₨ 129,187.8 |
| Principal Owner | |||
| Related Party Transaction [Line Items] | |||
| Loans | 0.0 | 0.0 | |
| Other assets | 0.0 | 0.0 | |
| Investments available for sale securities | 0.0 | 0.0 | |
| Total | 0.0 | 0.0 | |
| Others | |||
| Related Party Transaction [Line Items] | |||
| Loans | 28.2 | 34,504.5 | |
| Other assets | 1,713.7 | 1,878.6 | |
| Investments available for sale securities | 28,498.1 | 28,364.6 | |
| Total | 30,240.0 | 64,747.7 | |
| Related Party | |||
| Related Party Transaction [Line Items] | |||
| Loans | 28.2 | 0.3 | 34,504.5 |
| Other assets | 1,713.7 | 20.1 | 1,878.6 |
| Investments available for sale securities | 28,498.1 | 333.6 | 28,364.6 |
| Total | ₨ 30,240.0 | $ 354.0 | ₨ 64,747.7 |