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Contractual Residual Maturity of Available for Sale Mortgage-Backed and Asset-Backed Securities (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2017 INR (₨)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 INR (₨)
Amortized Cost
Amortized Cost	₨ 2,072,759.4	$ 31,962.3	₨ 1,862,550.9
Fair Value
Total	2,111,385.6	32,558.0	₨ 1,878,684.4
Asset and Mortgage Backed Securities
Amortized Cost
Within one year	11,440.5
Over one year through five years	10,822.8
Over five years through ten years	52.2
Over ten years	270.8
Amortized Cost	22,586.3
Fair Value
Within one year	11,320.1	174.6
Over one year through five years	10,672.4	164.6
Over five years through ten years	52.0	0.8
Over ten years	408.5	6.3
Total	₨ 22,453.0	$ 346.3

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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