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Loans - Loan Delinquency and Non-Accrual Loans (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 |
Finance receivable on non-accrual status |  | 375,910.9 |  | 4,400.2 |  | 327,443.9 |
Retail Loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 21,531,565.4 |  | 252,037.5 |  | 19,590,408.1 |
Retail Loans | Auto loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 1,550,907.4 |  | 18,154.1 |  | 1,378,523.1 |
Finance receivable on non-accrual status |  | 16,360.1 |  |  |  | 14,998.0 |
Retail Loans | Personal loans/Credit card |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 3,426,193.3 |  | 40,105.3 |  | 3,119,246.7 |
Finance receivable on non-accrual status |  | 28,927.7 |  |  |  | 25,466.5 |
Retail Loans | Retail business banking |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 4,967,690.0 |  | 58,149.2 |  | 4,207,836.2 |
Finance receivable on non-accrual status |  | 67,930.3 |  |  |  | 53,355.4 |
Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 1,862,193.6 |  | 21,797.9 |  | 1,619,602.9 |
Finance receivable on non-accrual status |  | 28,370.4 |  |  |  | 21,563.6 |
Retail Loans | Housing loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 7,141,179.0 |  | 83,591.0 |  | 6,993,168.0 |
Finance receivable on non-accrual status |  | 50,161.9 |  |  |  | 43,712.7 |
Retail Loans | Other Retail |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 2,583,402.1 |  | 30,240.0 |  | 2,272,031.2 |
Finance receivable on non-accrual status |  | 89,835.3 |  |  |  | 61,520.0 |
Wholesale loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 7,107,245.7 |  | 83,193.8 |  | 7,202,639.3 |
Finance receivable on non-accrual status |  | 94,325.2 |  |  |  | 106,827.7 |
31 to 90 days past due |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 162,948.3 |  | 1,907.4 |  | 161,159.9 |
31 to 90 days past due | Retail Loans | Auto loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 8,143.6 |  |  |  | 6,083.8 |
31 to 90 days past due | Retail Loans | Personal loans/Credit card |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 32,386.3 |  |  |  | 24,446.2 |
31 to 90 days past due | Retail Loans | Retail business banking |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 20,814.2 |  |  |  | 12,571.8 |
31 to 90 days past due | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 21,153.2 |  |  |  | 19,351.4 |
31 to 90 days past due | Retail Loans | Housing loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 35,639.8 |  |  |  | 37,025.6 |
31 to 90 days past due | Retail Loans | Other Retail |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 41,687.8 |  |  |  | 26,479.0 |
31 to 90 days past due | Wholesale loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 3,123.4 |  |  |  | 35,202.1 |
Non-accrual/ 91 days or more past due |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 375,910.9 |  | 4,400.2 |  | 327,443.9 |
Non-accrual/ 91 days or more past due | Retail Loans | Auto loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 16,360.1 |  |  |  | 14,998.0 |
Non-accrual/ 91 days or more past due | Retail Loans | Personal loans/Credit card |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 28,927.7 |  |  |  | 25,466.5 |
Non-accrual/ 91 days or more past due | Retail Loans | Retail business banking |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 67,930.3 |  |  |  | 53,355.4 |
Non-accrual/ 91 days or more past due | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 28,370.4 |  |  |  | 21,563.6 |
Non-accrual/ 91 days or more past due | Retail Loans | Housing loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 50,161.9 |  |  |  | 43,712.7 |
Non-accrual/ 91 days or more past due | Retail Loans | Other Retail |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 89,835.3 |  |  |  | 61,520.0 |
Non-accrual/ 91 days or more past due | Wholesale loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans |  | 94,325.2 |  |  |  | 106,827.7 |
Total current |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 28,099,951.9 | [1] | $ 328,923.7 | [1] | 26,304,443.6 | [3]
Total current | Retail Loans | Auto loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 1,526,403.7 | [1] |  |  | 1,357,441.3 | [3]
Total current | Retail Loans | Personal loans/Credit card |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 3,364,879.3 | [1] |  |  | 3,069,334.0 | [3]
Total current | Retail Loans | Retail business banking |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 4,878,945.5 | [1] |  |  | 4,141,909.0 | [3]
Total current | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 1,812,670.0 | [1] |  |  | 1,578,687.9 | [3]
Total current | Retail Loans | Housing loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 7,055,377.3 | [1] |  |  | 6,912,429.7 | [3]
Total current | Retail Loans | Other Retail |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | 2,451,879.0 | [1] |  |  | 2,184,032.2 | [3]
Total current | Wholesale loans |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Gross loans | [2] | ₨ 7,009,797.1 | [1] |  |  | ₨ 7,060,609.5 | [3]
[1] | Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 44.4 billion.
[2] | Loans up to 30 days past due are considered current.
[3] | Includes crop-related agricultural loans with days past due less than 366 as they are not considered as non-performing of Rs. 35.4 billion.

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