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v3.25.2

Commitments and Contingencies - Additional Information (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2023 INR (₨) | Mar. 31, 2025 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Capital commitments, estimated amounts of contracts remaining to be executed on the capital account | ₨ 35,972.8 |  | ₨ 45,346.5 |  |
Additional operating lease commitments with leases which have not yet commenced | 385.3 |  |  |  | $ 4.5
Operating lease expense | ₨ 25,248.2 | $ 295.5 | 25,447.4 | ₨ 16,164.9 |
Minimum [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Additional operating lease commitments with leases which have not yet commenced, lease term | 2 years |  |  |  | 2 years
Maximum [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Additional operating lease commitments with leases which have not yet commenced, lease term | 21 years |  |  |  | 21 years
Indirect Taxes And Other Claims |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Contingencies, estimated possible loss | ₨ 60,331.1 |  | ₨ 38,498.3 |  |

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