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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, 2022 INR (₨)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 INR (₨)
Concentration Risk [Line Items]
Total Exposure	₨ 16,528,039.5	$ 217,846.7	₨ 13,807,140.7
Borrower 1
Concentration Risk [Line Items]
Total Exposure	266,161.9	3,508.1	303,418.5
Borrower 1 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	265,661.9		302,918.5
Borrower 1 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	500.0		500.0
Borrower 2
Concentration Risk [Line Items]
Total Exposure	245,435.0	3,234.9	253,526.4
Borrower 2 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	245,435.0		192,080.2
Borrower 2 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		61,446.2
Borrower 3
Concentration Risk [Line Items]
Total Exposure	236,497.9	3,117.1	195,480.0
Borrower 3 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	119,950.5		195,480.0
Borrower 3 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	116,547.4		0.0
Borrower 4
Concentration Risk [Line Items]
Total Exposure	150,283.8	1,980.8	155,545.9
Borrower 4 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	150,283.8		154,997.8
Borrower 4 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		548.1
Borrower 5
Concentration Risk [Line Items]
Total Exposure	145,908.2	1,923.1	150,489.2
Borrower 5 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	126,639.8		150,000.0
Borrower 5 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	19,268.4		489.2
Borrower 6
Concentration Risk [Line Items]
Total Exposure	142,600.0	1,879.5	148,107.3
Borrower 6 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	142,600.0		148,107.3
Borrower 6 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		0.0
Borrower 7
Concentration Risk [Line Items]
Total Exposure	140,232.0	1,848.3	104,308.5
Borrower 7 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	140,000.0		3,830.9
Borrower 7 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	232.0		100,477.6
Borrower 8
Concentration Risk [Line Items]
Total Exposure	137,899.2	1,817.6	100,919.7
Borrower 8 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	137,700.0		98,919.7
Borrower 8 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	199.2		2,000.0
Borrower 9
Concentration Risk [Line Items]
Total Exposure	133,670.0	1,761.8	97,706.2
Borrower 9 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	133,670.0		75,437.8
Borrower 9 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	0.0		22,268.4
Borrower 10
Concentration Risk [Line Items]
Total Exposure	126,447.2	$ 1,666.6	90,108.0
Borrower 10 | Funded Exposure
Concentration Risk [Line Items]
Total Exposure	108,591.5		90,108.0
Borrower 10 | Non-Funded Exposure
Concentration Risk [Line Items]
Total Exposure	₨ 17,855.7		₨ 0.0

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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