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Details of Guarantees and Documentary Credits Outstanding (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2019 INR (₨)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 INR (₨)
Guarantor Obligations [Line Items]
Bank guarantees	₨ 1,015,442.1	$ 14,682.5	₨ 846,958.3
Estimated fair values of bank guarantees	(4,046.1)	(58.5)	(3,231.5)
Financial guarantees
Guarantor Obligations [Line Items]
Bank guarantees	254,075.9	3,673.7	237,417.3
Performance guarantees
Guarantor Obligations [Line Items]
Bank guarantees	285,748.4	4,131.7	214,088.3
Documentary credits
Guarantor Obligations [Line Items]
Bank guarantees	475,617.8	6,877.1	395,452.7
Estimated fair values of documentary credits	(501.7)	(7.3)	(406.1)
Guarantees
Guarantor Obligations [Line Items]
Estimated fair values of bank guarantees	₨ (3,544.4)	$ (51.2)	₨ (2,825.4)

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- Definition

Estimated fair value of documentary credits.

+ References

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248

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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.

+ References

No definition available.

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- Definition

Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12201-110248

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