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Investments, AFS debt securities - Gross Realized Gains and Gross Realized Losses from Sales of Available for Sale Debt Securities and Dividends and Interest on Such Securities (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 (₨)
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Gross realized gains on sale | ₨ 20,943.7 | $ 245.2 | ₨ 3,592.4 | ₨ 259.1
Gross realized losses on sale | (14,118.7) | (165.3) | (2,765.7) | (979.4)
Realized gains/ (losses), net | 6,825.0 | 79.9 | 826.7 | (720.3)
Dividends and interest | 625,200.6 | 7,318.3 | 516,550.0 | 304,566.7
Total | ₨ 632,025.6 | $ 7,398.2 | ₨ 517,376.7 | ₨ 303,846.4

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- Definition The total amount of operating dividend and interest income and the difference between gross realized gains and losses on available-for-sale securities. + References No definition available. + Details
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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
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