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Summary of Significant Accounting Policies - Additional Information (Detail) - Mar. 31, 2015 - Entity [Domain] - Segment	Total
Significant Accounting Policies [Line Items]
Reportable segments	3
U.S. Dollars To Indian Rupee
Significant Accounting Policies [Line Items]
Financial statements translation rate, Indian rupees (Rs.) equivalence of U.S. $1	62.31
Retail Loans | Personal loans/Credit card
Significant Accounting Policies [Line Items]
Loans charge off period	150 days
Retail Loans | Auto Loans, Commercial Vehicle and Construction Equipment Finance
Significant Accounting Policies [Line Items]
Loans charge off period	180 days
Retail Loans | Housing loans
Significant Accounting Policies [Line Items]
Loans charge off period	720 days
Retail Loans | Retail Business Banking
Significant Accounting Policies [Line Items]
Loans charge off period	Customer to customer basis
Minimum
Significant Accounting Policies [Line Items]
Bank voting rights or control	50.00%
Bank voting rights	20.00%
Minimum | Retail Loans
Significant Accounting Policies [Line Items]
Loans charge off period	150 days
Maximum
Significant Accounting Policies [Line Items]
Bank voting rights	50.00%
Maximum | Retail Loans
Significant Accounting Policies [Line Items]
Loans charge off period	1083 days

X

- Definition

Consolidated Subsidiary Ownership Percentage

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- Definition

Loans Charge Off Description

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- Definition

Significant Accounting Policies [Line Items]

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 323



-SubTopic 10



-Section 50



-Paragraph 3



-Subparagraph (a)(1)



-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 830



-SubTopic 30



-Section S99



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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