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Loan Delinquency and Non-Accrual Loans (Parenthetical) (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2022 INR (₨)	Mar. 31, 2021 INR (₨)	Mar. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	₨ 14,409,544.0	₨ 12,043,717.9	$ 189,924.1
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of days past due up to which loans considered current	30 days	30 days
Number of past days less than to which Crop Related Agricultural loans are not considered as impaired	366 days	366 days
Agricultural Loan | Not Impaired or Less Than 366 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	₨ 34,200.0	₨ 33,600.0

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Past due period up to which crop related agricultural loans considered current.

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Past due period up to which loans other than crop related agricultural loans considered current.

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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 https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524

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