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Fair Values of Credit Substitutes (Detail) - Debt securities, other than asset and mortgage-backed securities ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2016 INR (₨)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 INR (₨)	Mar. 31, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Pass	₨ 297,241.0		₨ 195,058.9	$ 4,486.7
Impaired-gross balance	0.0		0.0	0.0
Less: amounts provided for other than temporary impairments	0.0	$ 0.0	0.0
Impaired credit substitutes, net	0.0		0.0	0.0
Total credit substitutes, net	₨ 297,241.0		₨ 195,058.9	$ 4,486.7

X

- Definition

Amount of Investments in Credit Substitutes Securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

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X

- Definition

Credit Substitutes Performing in which payments are received or paid on a timely basis in accordance with the terms of the contract.

+ References

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- Definition

Credit Substitutes Impaired Gross Amount where fair value is below cost and the decline is other than temporary.

+ References

No definition available.

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X

- Definition

Credit Substitutes, net, after provision made towards other than temporary impairments.

+ References

No definition available.

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X

- Definition

The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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