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Changes in Accumulated Other Comprehensive Income After Tax (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2015 INR (₨)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 INR (₨)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	₨ (11,590.4)		₨ 485.4
Net unrealized gain/(loss) arising during the period	22,281.8		(12,056.3)
Amounts reclassified to income	135.0		(19.5)
Ending Balance	10,826.4	$ 173.8	(11,590.4)
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(12,064.9)		222.4
Net unrealized gain/(loss) arising during the period	22,188.9		(12,267.8)
Amounts reclassified to income	135.0		(19.5)
Ending Balance	10,259.0	164.6	(12,064.9)
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	474.5		263.0
Net unrealized gain/(loss) arising during the period	92.9		211.5
Amounts reclassified to income	0.0		0.0
Ending Balance	₨ 567.4	$ 9.2	₨ 474.5

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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-Name Accounting Standards Codification



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-SubTopic 10



-Section 45



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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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