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Property and Equipment - Additional Information (Detail) ₨ in Millions, $ in Millions | 12 Months Ended
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Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2023 INR (₨)
Property, Plant and Equipment [Line Items] |  |  |  |
Depreciation and amortization | ₨ 37,784.1 | $ 442.3 | ₨ 31,147.3 | ₨ 23,489.7

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