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Loan Delinquency and Non-Accrual Loans (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2017 INR (₨) | Mar. 31, 2017 USD ($) | Mar. 31, 2016 INR (₨)
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | ₨ 5,988,909.7 | $ 92,350.2 | ₨ 4,992,834.4
Retail Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 4,048,961.3 | 62,435.8 | 3,458,565.7
Retail Loans | Auto loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 720,657.8 | 11,112.7 | 589,010.3
Retail Loans | Personal loans/Credit card |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 841,806.8 | 12,980.8 | 626,152.2
Retail Loans | Retail Business Banking |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 913,720.2 | 14,089.7 | 791,857.3
Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 460,365.2 | 7,098.9 | 369,992.4
Retail Loans | Housing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 383,866.9 | 5,919.3 | 318,692.0
Retail Loans | Other Retail |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 728,544.4 | 11,234.4 | 762,861.5
Wholesale loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 1,939,948.4 | 29,914.4 | 1,534,268.7
Financing Receivable, 31 to 90 Days Past Due |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 35,409.1 | 546.0 | 26,768.0
Financing Receivable, 31 to 90 Days Past Due | Retail Loans | Auto loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 3,300.4 |  | 3,383.3
Financing Receivable, 31 to 90 Days Past Due | Retail Loans | Personal loans/Credit card |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 5,305.5 |  | 4,228.6
Financing Receivable, 31 to 90 Days Past Due | Retail Loans | Retail Business Banking |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 7,959.1 |  | 8,281.2
Financing Receivable, 31 to 90 Days Past Due | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 6,098.3 |  | 5,146.2
Financing Receivable, 31 to 90 Days Past Due | Retail Loans | Housing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 47.6 |  | 62.2
Financing Receivable, 31 to 90 Days Past Due | Retail Loans | Other Retail |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 11,635.5 |  | 3,842.8
Financing Receivable, 31 to 90 Days Past Due | Wholesale loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 1,062.7 |  | 1,823.7
Impaired / 91 days or more past due |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 82,979.7 | 1,279.6 | 52,982.7
Impaired / 91 days or more past due | Retail Loans | Auto loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 6,105.6 |  | 4,494.5
Impaired / 91 days or more past due | Retail Loans | Personal loans/Credit card |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 6,467.4 |  | 4,441.6
Impaired / 91 days or more past due | Retail Loans | Retail Business Banking |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 21,060.1 |  | 15,486.0
Impaired / 91 days or more past due | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 6,086.6 |  | 5,150.7
Impaired / 91 days or more past due | Retail Loans | Housing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 1,678.2 |  | 1,068.6
Impaired / 91 days or more past due | Retail Loans | Other Retail |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 11,306.1 |  | 6,781.6
Impaired / 91 days or more past due | Wholesale loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans |  | 30,275.7 |  | 15,559.7
Total current |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 5,870,520.9 | $ 90,524.6 | 4,913,083.7
Total current | Retail Loans | Auto loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 711,251.8 |  | 581,132.5
Total current | Retail Loans | Personal loans/Credit card |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 830,033.9 |  | 617,482.0
Total current | Retail Loans | Retail Business Banking |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 884,701.0 |  | 768,090.1
Total current | Retail Loans | Commercial vehicle and construction equipment finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 448,180.3 |  | 359,695.5
Total current | Retail Loans | Housing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 382,141.1 |  | 317,561.2
Total current | Retail Loans | Other Retail |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | 705,602.8 |  | 752,237.1
Total current | Wholesale loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Gross loans | [1],[2] | ₨ 1,908,610.0 |  | ₨ 1,516,885.3
[1] | Includes crop related agricultural loans with days past due less than 366 as they are not considered as impaired
[2] | Loans up to 30 days past due are considered current

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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