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Troubled Debt Restructurings that Have Defaulted (Detail) - 12 months ended Mar. 31, 2017 ₨ in Millions, $ in Millions | INR (₨) | USD ($)
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Financing Receivable, Modifications [Line Items] |  |
Recorded investment of defaults | ₨ 103.2 | $ 1.6
Retail Loans | Retail Business Banking |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment of defaults | 17.3 |
Retail Loans | Commercial vehicle and construction equipment finance |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment of defaults | 45.4 |
Wholesale loans |  |
Financing Receivable, Modifications [Line Items] |  |
Recorded investment of defaults | ₨ 40.5 |

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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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