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Loans - Loan Delinquency and Non-Accrual Loans (Parenthetical) (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨)
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Gross loans | ₨ 28,638,811.1 | $ 335,231.3 | ₨ 26,793,047.4
Current loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable period past due | 30 days | 30 days | 30 days
Agricultural Loan | Not Impaired or Less Than 366 days Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Gross loans | ₨ 44,400.0 |  | ₨ 35.4

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