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v3.25.2

Related Party Transactions - Significant Transactions with Related Parties Included in Determination of Net Income (Detail) $ in Thousands, ₨ in Millions | 12 Months Ended
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Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2023 INR (₨)
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | ₨ 3,227,962.6 | $ 37,784,800 | ₨ 2,781,926.2 | ₨ 1,689,526.7
Interest And Dividend Income Operating | (1,254,947.4) | (14,689,800) | (997,405.6) | (615,108.9)
Related party transaction non-interest expense | (1,265,631.4) | (14,814,900) | (1,069,242.4) | (468,779.4)
Interest Expenses-Others | (2,810.8) | (32,900) | (3,815.9) | (698.7)
Principal Owner |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest And Dividend Income Operating | 0.0 |  | (30.6) | (95.3)
Interest Expenses-Others | 0.0 |  | 0.0 | 0.0
Non-interest revenue-Others | 0.0 |  | 0.0 | 0.0
Principal Owner | Non-Interest Revenue-Fees and Commissions |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | 0.0 |  | 1,670.2 | 5,888.2
Principal Owner | Interest and Dividend Revenue |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | 0.0 |  | 0.0 | 0.0
Principal Owner | Non-interest expense-Administrative and other |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction non-interest expense | 0.0 |  | (2,424.6) | (8,631.1)
Principal Owner | Non-interest expense-Premises and equipment |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction non-interest expense | 0.0 |  | (0.5) | (15.6)
Others |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest And Dividend Income Operating | (29.0) |  | (115.4) | (606.1)
Interest Expenses-Others | (856.4) |  | (514.7) | 0.0
Non-interest revenue-Others | 0.0 |  | 78.0 | 0.0
Others | Non-Interest Revenue-Fees and Commissions |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | 6,996.6 |  | 8,205.3 | 26,766.6
Others | Interest and Dividend Revenue |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | 732.0 |  | 3,242.9 | 0.1
Others | Non-interest expense-Administrative and other |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction non-interest expense | (2,179.8) |  | (4,140.1) | (5,524.8)
Others | Non-interest expense-Premises and equipment |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction non-interest expense | (1.2) |  | (1.2) | 0.0
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest And Dividend Income Operating | (29.0) | (300) | (146.0) | (701.4)
Interest Expenses-Others | (856.4) | (10,000) | (514.7) | 0.0
Non-interest revenue-Others | 0.0 | 0 | 78.0 | 0.0
Related Party | Non-Interest Revenue-Fees and Commissions |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | 6,996.6 | 81,900 | 9,875.5 | 32,654.8
Related Party | Interest and Dividend Revenue |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction revenues | 732.0 | 8,600 | 3,242.9 | 0.1
Related Party | Non-interest expense-Administrative and other |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction non-interest expense | (2,179.8) | (25,500) | (6,564.7) | (14,155.9)
Related Party | Non-interest expense-Premises and equipment |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction non-interest expense | ₨ (1.2) | $ 0 | ₨ (1.7) | ₨ (15.6)

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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 45 -Paragraph 39 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477346/946-830-45-39 + Details
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