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Grading Indicators Related to Bank's Retail Loans and Wholesale Loans (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2020 INR (₨)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	₨ 10,623,855.6	$ 140,918.6	₨ 9,111,464.6
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	3,583,055.2	47,527.0	2,873,561.0
Wholesale loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	3,524,290.5	46,747.5	2,834,466.7
Wholesale loans | Labeled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	23,341.3	309.6	940.6
Wholesale loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	35,423.4	469.9	38,153.7
Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	7,040,800.4	93,391.6	6,237,903.6
Retail Loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	122,003.5		102,268.8
Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	952,053.1	12,628.4	951,744.2
Retail Loans | Auto loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	15,279.2		13,606.7
Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,920,601.6	25,475.5	1,538,107.4
Retail Loans | Personal loans/Credit card | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	14,481.7		15,781.5
Retail Loans | Retail Business Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,658,770.3	22,002.5	1,478,317.8
Retail Loans | Retail Business Banking | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	32,866.3		29,945.0
Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	747,382.4	9,913.5	746,288.0
Retail Loans | Commercial vehicle and construction equipment finance | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	22,992.2		11,254.9
Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	634,612.4	8,417.7	513,771.6
Retail Loans | Housing loans | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	2,921.3		2,157.1
Retail Loans | Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,127,380.6	14,954.0	1,009,674.6
Retail Loans | Other Retail | Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	33,462.8		29,523.6
Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	10,466,428.7	$ 138,830.5	8,971,042.1
Performing | Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	6,918,796.9		6,135,634.8
Performing | Retail Loans | Auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	936,773.9		938,137.5
Performing | Retail Loans | Personal loans/Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,906,119.9		1,522,325.9
Performing | Retail Loans | Retail Business Banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1,625,904.0		1,448,372.8
Performing | Retail Loans | Commercial vehicle and construction equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	724,390.2		735,033.1
Performing | Retail Loans | Housing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	631,691.1		511,614.5
Performing | Retail Loans | Other Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	₨ 1,093,917.8		₨ 980,151.0

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

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