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Deposits - Additional Information (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2025 INR (₨) | Mar. 31, 2024 INR (₨) | Mar. 31, 2025 USD ($)
Deposits From Banking Clients [Line Items] |  |  |
Time deposits with residual maturity of one year or less | ₨ 12,328,690.0 | ₨ 10,598,905.6 | $ 144,313.4
Maturity of deposits | 1 year |  | 1 year
Time deposits | ₨ 17,689,697.7 | 14,700,957.1 | $ 207,066.6
Excess in time deposits | ₨ 0.5 | 0.5 |
Maximum [Member] |  |  |
Deposits From Banking Clients [Line Items] |  |  |
Maturity of deposits | 10 years |  | 10 years
Deposit in excess of Rs. 500000 |  |  |
Deposits From Banking Clients [Line Items] |  |  |
Time deposits | ₨ 15,657,927.8 | ₨ 12,777,915.1 |

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- Definition Deposits From Banking Clients [Line Items] + References No definition available. + Details
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- Definition Amount of increase (decrease) in time deposits classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 230 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479024/942-230-45-1 + Details
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- Definition Period of time between issuance and maturity of customer deposits, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of time deposit maturing in next fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 470 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-1 + Details
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- Definition Amount of time deposit liabilities, including certificates of deposit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478353/942-405-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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