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Credit substitutes (Tables) | 12 Months Ended
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Mar. 31, 2025
Fair value of credit substitutes | The fair value of credit substitutes by type of instrument as of March 31, 2024 and March 31, 2025 were as follows:
|  | As of March 31, |
|  | 2024 |  |  | 2025 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
|  | (In millions) |
Available for sale credit substitute debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures |  | Rs. | 132,926.5 |  |  | Rs. | 131,458.6 |  |  | Rs. | 160,975.7 |  |  | Rs. | 161,147.8 |
Preference shares |  |  | 271.3 |  |  |  | 28.3 |  |  |  | 332.8 |  |  |  | 31.8 |
Commercial paper |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | Rs. | 133,197.8 |  |  | Rs. | 131,486.9 |  |  | Rs. | 161,308.5 |  |  | Rs. | 161,179.6 |
|  |  |  |  |  |  |  |  |  | US$ | 1,888.2 |  |  | US$ | 1,886.7 |
Credit substitutes by bank's internal credit quality indicators | The fair value of credit substitutes by the Bank’s internal credit quality indicators and amounts provided for non-performing credit substitutes is as follows:
|  | As of March 31, |
|  | 2024 |  |  | 2025 |  |  | 2025 |
|  | (In millions) |
Pass |  | Rs. | 131,486.9 |  |  | Rs. | 161,179.6 |  |  | US$ | 1,886.7 |
Non-performing—gross balance |  |  | — |  |  |  | — |  |  |  | — |
Less: Non-performing losses |  |  | — |  |  |  | — |  |  |  | — |
Non-performing credit substitutes, net |  |  | — |  |  |  | — |  |  |  | — |
Total credit substitutes, net |  | Rs. | 131,486.9 |  |  | Rs. | 161,179.6 |  |  | US$ | 1,886.7 |
Impaired credit substitutes | The following table provides information on non-performing credit substitutes as of March 31, 2024 and March 31, 2025:
|  | As of March 31, |
|  | 2024 |  |  | 2025 |  |  | 2025 |
|  | (In millions) |
Gross non-performing credit substitutes |  |  | Rs  — |  |  |  | Rs  — |  |  | US$ | — |
Gross non-performing credit substitutes by industry |  |  | Rs. — |  |  |  | Rs. — |  |  | US$ | — |
Average non-performing credit substitutes |  |  | Rs. — |  |  |  | Rs. — |  |  | US$ | — |
Interest income recognized on non-performing credit substitutes |  |  | Rs. — |  |  |  | Rs. — |  |  | US$ | — |

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- Definition Credit Substitutes by Credit Quality Indicators [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of impaired financing receivables. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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