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Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2015 INR (₨)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 INR (₨)	Mar. 31, 2013 INR (₨)
Available for sale securities:
Realized (gain)/loss on sales of available for sale securities, net	₨ 5,167.9	$ 82.9	₨ 1,755.7	₨ 2,227.8
Other than temporary impairment losses on available for sale securities	(1.8)	0.0	(664.7)	₨ (1,546.3)
Net of tax	135.0		(19.5)
Accumulated Net Unrealized Investment Gain (Loss)
Available for sale securities:
Net of tax	135.0		(19.5)
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Available for sale securities:
Realized (gain)/loss on sales of available for sale securities, net	202.7	3.3	(29.5)
Other than temporary impairment losses on available for sale securities	1.8	0.0	0.0
Total before tax	204.5	3.3	(29.5)
Income tax	(69.5)	(1.1)	10.0
Net of tax	₨ 135.0	$ 2.2	₨ (19.5)

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This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Amount before tax of 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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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).

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