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Exposures to Ten Largest Borrowers Computed as per RBI Guidelines, Based on Higher of Outstanding Balance or Limit on Loans, Investments (Including Credit Substitutes) and Non-Funded Exposures (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 INR (₨)
Concentration Risk [Line Items]
Total Exposure	₨ 19,671,729.4	$ 239,344.5	₨ 16,528,039.5
Borrower 1
Concentration Risk [Line Items]
Total Exposure	284,002.5	3,455.4	266,161.9
Borrower 1 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	284,002.5		265,661.9
Borrower 1 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		500.0
Borrower 2
Concentration Risk [Line Items]
Total Exposure	222,101.6	2,702.3	245,435.0
Borrower 2 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	220,901.6		245,435.0
Borrower 2 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	1,200.0		0.0
Borrower 3
Concentration Risk [Line Items]
Total Exposure	205,801.0	2,504.0	236,497.9
Borrower 3 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	205,801.0		119,950.5
Borrower 3 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		116,547.4
Borrower 4
Concentration Risk [Line Items]
Total Exposure	192,489.2	2,342.0	150,283.8
Borrower 4 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	80,344.5		150,283.8
Borrower 4 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	112,144.7		0.0
Borrower 5
Concentration Risk [Line Items]
Total Exposure	185,299.0	2,254.5	145,908.2
Borrower 5 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	185,299.0		126,639.8
Borrower 5 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		19,268.4
Borrower 6
Concentration Risk [Line Items]
Total Exposure	176,061.5	2,142.1	142,600.0
Borrower 6 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	154,296.7		142,600.0
Borrower 6 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	21,764.8		0.0
Borrower 7
Concentration Risk [Line Items]
Total Exposure	155,625.7	1,893.5	140,232.0
Borrower 7 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	155,565.7		140,000.0
Borrower 7 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	60.0		232.0
Borrower 8
Concentration Risk [Line Items]
Total Exposure	139,808.3	1,701.0	137,899.2
Borrower 8 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	139,808.3		137,700.0
Borrower 8 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		199.2
Borrower 9
Concentration Risk [Line Items]
Total Exposure	127,590.3	1,552.4	133,670.0
Borrower 9 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	121,560.0		133,670.0
Borrower 9 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	6,030.3		0.0
Borrower 10
Concentration Risk [Line Items]
Total Exposure	127,549.0	$ 1,551.9	126,447.2
Borrower 10 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	112,479.0		108,591.5
Borrower 10 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	₨ 15,070.0		₨ 17,855.7

X

- Definition

Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

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