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Portfolio of Available for Sale Debt Securities (Parenthetical) (Detail) - INR (₨) ₨ in Millions | Apr. 01, 2018 | Mar. 31, 2018
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Schedule of Available-for-sale Securities [Line Items] |  |  |
Equity securities, fair value | [1],[2] |  | ₨ 559.3
ASU 2016-01 |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Equity securities, cost |  | ₨ 855.6 |
Equity securities, fair value |  | ₨ 1,267.7 |
[1] | Effective April 1, 2018, the Bank adopted ASU 2016-01 (See note 2(w)(ii) to the Consolidated Financial Statements for additional details).
[2] | Equity securities classified within other assets.

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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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