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v3.25.2

Related Party Transactions - Additional Information (Detail) ₨ in Millions, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jul. 01, 2023 | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2023 INR (₨) | Mar. 31, 2025 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |
Purchase of investments from others |  | ₨ 0.0 |  | ₨ 316.7 |  |
Sale of investments from others |  | 10,131.7 |  | 8,859.5 |  |
Proceeds from issuance of long-term debt |  | 661,226.3 | $ 7,740.0 | 1,155,775.2 | ₨ 1,022,933.1 |
Dividend paid to principal owner |  | 158,058.1 | $ 1,850.1 | 86,617.1 | ₨ 86,394.3 |
Foreign exchange and derivative contracts, notional principal amount |  | 24,496,285.6 |  | 21,269,897.6 |  | $ 286,741.0
Bank guarantees |  | 2,462,279.4 |  | 1,973,917.9 |  | $ 28,822.2
Percentage of Capital Acquired through amalgamation | 100.00% |  |  |  |  |
Tier II bonds |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Proceeds from issuance of long-term debt |  | 12,191.0 |  | 10,241.0 |  |
Principal Owner |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Loans purchased from principal owner |  | 0.0 |  | 116,320.0 |  |
Dividend paid to principal owner |  | 0.0 |  | 0.0 |  |
Foreign exchange and derivative contracts, notional principal amount |  | 0.0 |  | 0.0 |  |
Foreign exchange and derivative contracts, mark to market gains |  | 0.0 |  | 0.0 |  |
Bank guarantees |  | 0.0 |  | 0.0 |  |
Principal Owner | Property Plant and equipment |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Fixed assets purchased from related parties |  | 2.9 |  | 0.0 |  |
Others |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Bank guarantees |  | ₨ 2.5 |  | ₨ 2.5 |  |

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