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Tax Effects of Significant Temporary Differences (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2018 INR (₨) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 INR (₨)
--- | --- | --- | ---
Deductible temporary differences: |  |  |
Allowance for loan losses | ₨ 30,732.5 | $ 472.0 | ₨ 19,491.1
Unrealized loss on securities available for sale | 2,491.2 | 38.3 | 0.0
Investments, others | 0.0 | 0.0 | 265.2
Derivatives | 309.8 | 4.8 | 633.2
Employee benefits | 1,905.5 | 29.3 | 1,666.7
Others | 4,718.5 | 72.4 | 3,453.0
Deferred tax asset | 40,157.5 | 616.8 | 25,509.2
Taxable temporary differences: |  |  |
Property and equipment | 434.0 | 6.7 | 1,196.1
Loan origination cost | 4,957.9 | 76.1 | 2,883.5
Investments, others | 479.2 | 7.4 | 0.0
Unrealized gain on securities available for sale | 0.0 | 0.0 | 13,367.7
Intangible assets | 0.3 | 0.0 | 0.7
Deferred tax liability | 5,871.4 | 90.2 | 17,448.0
Net deferred tax asset (liability) | ₨ 34,286.1 | $ 526.6 | ₨ 8,061.2

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