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Long Term Debt and Related Contractual Rates and Maturity Dates (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2016 INR (₨) | Mar. 31, 2015 INR (₨) | Mar. 31, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |
Total |  | ₨ 522,313.5 | ₨ 457,934.4 | $ 7,884.0
Subordinated debt | Lower tier II capital | Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start |  | 2017 | 2016 |
Maturity /Call dates, end |  | 2025 | 2025 |
Total |  | ₨ 121,420.0 | ₨ 133,440.0 | 1,832.8
Subordinated debt | Upper tier II capital | Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start |  | 2017 | 2016 |
Maturity /Call dates, end |  | 2021 | 2021 |
Total |  | ₨ 34,159.0 | ₨ 34,159.0 | 515.6
Subordinated debt | Upper tier II capital | Variable Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start |  | 2017 | 2016 |
Maturity /Call dates, end |  | 2017 | 2017 |
Total |  | ₨ 6,625.5 | ₨ 6,250.0 | $ 100.0
Subordinated debt | Upper tier II capital | Perpetual debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start |  | 2017 | 2016 |
Maturity /Call dates, end |  | 2018 | 2017 |
Stated interest rates |  | 9.92% | 9.92% | 9.92%
Total |  | ₨ 2,000.0 | ₨ 2,000.0 | $ 30.2
Subordinated debt | London Interbank Offered Rate (LIBOR) | Upper tier II capital | Variable Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates, margin on LIBOR rate |  | 1.20% | 1.20% |
Subordinated debt | Minimum | Lower tier II capital | Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates |  | 6.00% | 6.00% | 6.00%
Subordinated debt | Minimum | Upper tier II capital | Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates |  | 8.70% | 8.70% | 8.70%
Subordinated debt | Maximum | Lower tier II capital | Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates |  | 10.70% | 10.70% | 10.70%
Subordinated debt | Maximum | Upper tier II capital | Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates |  | 10.85% | 10.85% | 10.85%
Others | Variable rate-(1) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start | [1] | 2017 | 2016 |
Maturity /Call dates, end | [1] | 2020 | 2018 |
Total | [1] | ₨ 63,207.3 | ₨ 49,375.0 | $ 954.0
Others | Variable rate-(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start | [1] | 2017 | 2016 |
Maturity /Call dates, end | [1] | 2020 | 2019 |
Total | [1] | ₨ 74,787.4 | ₨ 72,737.8 | 1,128.9
Others | Fixed rate-(1) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start | [1] | 2017 | 2016 |
Maturity /Call dates, end | [1] | 2026 | 2025 |
Total | [1] | ₨ 142,750.0 | ₨ 83,950.0 | 2,154.7
Others | Fixed rate-(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity /Call dates, start | [1] | 2017 | 2016 |
Maturity /Call dates, end | [1] | 2018 | 2018 |
Total | [1] | ₨ 77,364.3 | ₨ 76,022.6 | $ 1,167.8
Others | Minimum | Variable rate-(1) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 1.08% | 1.50% | 1.08%
Others | Minimum | Variable rate-(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 9.40% | 9.95% | 9.40%
Others | Minimum | Fixed rate-(1) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 8.27% | 8.45% | 8.27%
Others | Minimum | Fixed rate-(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 1.20% | 1.11% | 1.20%
Others | Maximum | Variable rate-(1) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 4.30% | 2.59% | 4.30%
Others | Maximum | Variable rate-(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 11.05% | 10.55% | 11.05%
Others | Maximum | Fixed rate-(1) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 10.81% | 10.81% | 10.81%
Others | Maximum | Fixed rate-(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rates | [1] | 4.30% | 4.30% | 4.30%
[1] | Variable rate (1) and fixed rate (2) represent foreign currency debt

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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