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Long-Term Debt - Additional Information (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 INR (₨) | Mar. 31, 2021 INR (₨) | Mar. 31, 2022 USD ($)
Debt Instrument [Line Items] |  |  |  |
Subordinated debt, debt raised during the year |  | ₨ 0.0 | ₨ 3,565.0 |
Other long term debt, debt raised during the year |  | 638,226.4 | 478,424.2 |
Perpetual debt, debt raised during the year |  | 84,682.5 | 0.0 |
Other long-term debt | [1] | 1,295,854.3 | 964,014.9 | $ 17,079.9
Foreign currency borrowings |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Other long-term debt |  | 40,170.0 | 51,188.9 |
Functional currency borrowings |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Other long-term debt |  | ₨ 1,255,684.3 | ₨ 912,826.0 |
[1] | Includes securities sold under repurchase agreements amounting to Rs. 90,200.0 million with a stated interest rate of 4.0% per annum and Rs. 90,200 (US$ 1,188.9 million) with stated interest rate of 4.0% per annum for the years ended March 31, 2021 and March 31, 2022, respectively, under RBI long-term repo operation with a three- year maturity period.

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