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Grading Indicators Related to Bank's Retail Loans and Wholesale Loans (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2018 INR (₨) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 INR (₨)
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | ₨ 7,376,179.0 | $ 113,288.0 | ₨ 5,988,909.7
Wholesale loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 2,162,814.4 | 33,217.8 | 1,939,948.4
Wholesale loans | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 2,116,499.3 | 32,506.5 | 1,893,736.5
Wholesale loans | Labeled |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 13,502.3 | 207.4 | 15,936.2
Wholesale loans | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 32,812.8 | 503.9 | 30,275.7
Retail Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 5,213,364.6 | 80,070.2 | 4,048,961.3
Retail Loans | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 75,904.5 |  | 52,704.0
Retail Loans | Auto loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 885,234.7 | 13,596.0 | 720,657.8
Retail Loans | Auto loans | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 8,634.5 |  | 6,105.6
Retail Loans | Personal loans/Credit card |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 1,187,127.1 | 18,232.6 | 841,806.8
Retail Loans | Personal loans/Credit card | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 10,150.9 |  | 6,467.4
Retail Loans | Retail Business Banking |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 1,305,219.8 | 20,046.4 | 913,720.2
Retail Loans | Retail Business Banking | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 25,547.2 |  | 21,060.1
Retail Loans | Commercial vehicle and construction equipment finance |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 595,813.6 | 9,150.9 | 460,365.2
Retail Loans | Commercial vehicle and construction equipment finance | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 6,968.1 |  | 6,086.6
Retail Loans | Housing loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 362,718.1 | 5,570.9 | 383,866.9
Retail Loans | Housing loans | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 1,899.5 |  | 1,678.2
Retail Loans | Other Retail |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 877,251.3 | 13,473.4 | 728,544.4
Retail Loans | Other Retail | Impaired |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 22,704.3 |  | 11,306.1
Performing |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 7,267,461.7 | $ 111,618.2 | 5,905,930.0
Performing | Retail Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 5,137,460.1 |  | 3,996,257.3
Performing | Retail Loans | Auto loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 876,600.2 |  | 714,552.2
Performing | Retail Loans | Personal loans/Credit card |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 1,176,976.2 |  | 835,339.4
Performing | Retail Loans | Retail Business Banking |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 1,279,672.6 |  | 892,660.1
Performing | Retail Loans | Commercial vehicle and construction equipment finance |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 588,845.5 |  | 454,278.6
Performing | Retail Loans | Housing loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | 360,818.6 |  | 382,188.7
Performing | Retail Loans | Other Retail |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivables | ₨ 854,547.0 |  | ₨ 717,238.3

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