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Fair Values of Credit Substitutes (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2015 INR (₨)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 INR (₨)
Schedule of Available-for-sale Securities [Line Items]
Total	₨ 1,504,412.8	$ 24,144.1	₨ 908,824.3
Debt securities, other than asset and mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total	1,478,411.7	23,726.6	891,679.9
Debt securities, other than asset and mortgage-backed securities | Fair Values Of Credit Substitutes
Schedule of Available-for-sale Securities [Line Items]
Pass	195,058.9	3,130.5	55,867.2
Impaired-gross balance	0.0	0.0	9,944.5
Less: amounts provided for other than temporary impairments	0.0	0.0	664.6
Impaired credit substitutes, net	0.0	0.0	9,279.9
Total	₨ 195,058.9	$ 3,130.5	₨ 65,147.1

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- Definition

Amount of provision made towards other than temporary impairments

+ References

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- Definition

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- Definition

Gross amount of available for sale securities where fair value is below cost and the decline is other than temporary.

+ References

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- Definition

Amount of available for sale securities, net, after provision made towards other than temporary impairments

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 25



-Paragraph 1



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 5



-Subparagraph (aa)



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 45



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562

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