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Allowance for Credit Losses (Parenthetical) (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2019 INR (₨)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 INR (₨)	Mar. 31, 2017 INR (₨)
Financing Receivable, Allowance for Credit Loss [Line Items]
Cash recoveries, recoveries against write off cases	₨ 16,777.1	$ 242.6	₨ 12,590.8	₨ 9,748.6
Retail Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Recoveries of loans	16,590.9		12,254.3	8,943.7
Wholesale loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Recoveries of loans	₨ 186.2		₨ 336.5	₨ 804.9

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
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+ References

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
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-URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448

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