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Troubled Debt Restructurings Modifications (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2017 INR (₨) | Mar. 31, 2017 USD ($) | [1] | Mar. 31, 2016 INR (₨) | Mar. 31, 2017 USD ($) | [1]
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | ₨ 12,747.5 | [1] |  | ₨ 124.0 | [2] | $ 196.6
Balance of Principal Forgiven |  | 0.0 | [1] | $ 0.0 | 0.0 | [2] |
Net P&L impact |  | 1,278.4 | [1],[3] | $ 19.7 | 40.2 | [2],[3] |
Retail Loans | Retail Business Banking |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 0.0 |  |  | 19.0 |  |
Balance of Principal Forgiven |  | 0.0 |  |  | 0.0 |  |
Net P&L impact | [3] | 0.0 |  |  | 0.1 |  |
Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 0.0 |  |  | 67.0 |  |
Balance of Principal Forgiven |  | 0.0 |  |  | 0.0 |  |
Net P&L impact | [3] | 0.0 |  |  | 17.0 |  |
Wholesale loans |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 12,747.5 |  |  | 38.0 |  |
Balance of Principal Forgiven |  | 0.0 |  |  | 0.0 |  |
Net P&L impact | [3] | 1,278.4 |  |  | 23.1 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal Payments |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 0.0 | [1],[4] |  | 0.0 | [2],[4] | 0.0
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal Payments | Retail Loans | Retail Business Banking |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value | [4] | 0.0 |  |  | 0.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal Payments | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value | [4] | 0.0 |  |  | 0.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal Payments | Wholesale loans |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value | [4] | 0.0 |  |  | 0.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Interest Payments |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 0.0 | [1],[5] |  | 124.0 | [2],[5] | 0.0
Financing Receivable Troubled Debt Restructurings Changes in Amount of Interest Payments | Retail Loans | Retail Business Banking |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value | [5] | 0.0 |  |  | 19.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Interest Payments | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value | [5] | 0.0 |  |  | 67.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Interest Payments | Wholesale loans |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value | [5] | 0.0 |  |  | 38.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal and Interest Payments |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 12,747.5 | [1] |  | 0.0 | [2] | $ 196.6
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal and Interest Payments | Retail Loans | Retail Business Banking |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 0.0 |  |  | 0.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal and Interest Payments | Commercial vehicle and construction equipment finance |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | 0.0 |  |  | 0.0 |  |
Financing Receivable Troubled Debt Restructurings Changes in Amount of Principal and Interest Payments | Wholesale loans |  |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |  |
TDR modifications carrying value |  | ₨ 12,747.5 |  |  | ₨ 0.0 |  |
[1] | TDR modification during the year ended March 31, 2017 comprised of one case.
[2] | TDR modification during the year ended March 31, 2016 comprised of three cases.
[3] | Balances reflect charge-offs and/or allowance for credit losses and/or income not recognized/deferred
[4] | TDRs involving changes in the amount of principal payment may include principal forgiveness or deferral of periodic and/or final principal payments.
[5] | TDRs involving changes in the amount of interest payments may involve a reduction in interest rate.

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- Definition The increase (decrease) in the allowance for credit losses related to financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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