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Grading Indicators Related to Bank's Retail Loans and Wholesale Loans (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2016 INR (₨)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	₨ 4,992,834.4	$ 75,363.5	₨ 3,943,449.1
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,534,268.7	23,158.8	1,222,460.6
Wholesale loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,517,064.5	22,899.1	1,205,084.8
Wholesale loans | Labeled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,644.5	24.8	3,886.2
Wholesale loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	15,559.7	234.9	13,489.6
Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	3,458,565.7	52,204.7	2,720,988.5
Retail Loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	37,423.0		25,835.2
Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	589,010.3	8,890.7	486,251.7
Retail Loans | Auto loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	4,494.5		2,718.7
Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	626,152.2	9,451.4	449,381.7
Retail Loans | Personal loans/Credit card | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	4,441.6		2,648.4
Retail Loans | Retail Business Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	791,857.3	11,952.6	660,456.7
Retail Loans | Retail Business Banking | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	15,486.0		10,012.5
Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	369,992.4	5,584.8	305,995.4
Retail Loans | Commercial vehicle and construction equipment finance | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	5,150.7		5,559.4
Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	318,692.0	4,810.4	241,368.8
Retail Loans | Housing loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,068.6		242.7
Retail Loans | Other Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	762,861.5	11,514.8	577,534.2
Retail Loans | Other Loan | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	6,781.6		4,653.5
Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	4,939,851.7	$ 74,563.8	3,904,124.3
Performing | Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	3,421,142.7		2,695,153.3
Performing | Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	584,515.8		483,533.0
Performing | Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	621,710.6		446,733.3
Performing | Retail Loans | Retail Business Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	776,371.3		650,444.2
Performing | Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	364,841.7		300,436.0
Performing | Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	317,623.4		241,126.1
Performing | Retail Loans | Other Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	₨ 756,079.9		₨ 572,880.7

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524

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