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v3.19.2

Changes in Accumulated Other Comprehensive Income After Tax (Detail) ₨ in Millions, $ in Millions | 12 Months Ended
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Mar. 31, 2019 INR (₨) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 INR (₨)
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance | ₨ 1,176,493.3 |  | ₨ 1,027,901.1
Adoption of accounting standards | 0.0 |  |
Net unrealized gain/(loss) arising during the period | 17,769.0 |  | (21,373.2)
Amounts reclassified to income | (1,895.5) |  | (8,455.1)
Balance | 1,635,624.6 | $ 23,649.9 | 1,176,493.3
Available for Sale Securities |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance | (4,467.3) |  | 25,433.1
Adoption of accounting standards | (268.0) |  |
Net unrealized gain/(loss) arising during the period | 17,105.1 |  | (21,445.3)
Amounts reclassified to income | (1,895.5) |  | (8,455.1)
Balance | 10,474.3 | 151.5 | (4,467.3)
Foreign Currency Translation Reserve |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance | 670.6 |  | 598.5
Adoption of accounting standards | 0.0 |  |
Net unrealized gain/(loss) arising during the period | 663.9 |  | 72.1
Amounts reclassified to income | 0.0 |  | 0.0
Balance | 1,334.5 | 19.2 | 670.6
Accumulated Other Comprehensive Income (Loss) |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Balance | (3,796.7) |  | 26,031.6
Adoption of accounting standards | (268.0) |  |
Balance | ₨ 11,808.8 | $ 170.7 | ₨ (3,796.7)

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581 + Details
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