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Business Combination - Asset Acquired Liabilities Assumed in Business Combination (Detail) ₨ in Millions, $ in Millions | Jul. 01, 2023 INR (₨) | Jul. 01, 2023 USD ($) | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2024 USD ($) | Jul. 01, 2023 USD ($) | Mar. 31, 2023 INR (₨)
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B. Recognized amounts of identifiable liabilities assumed and Noncontrolling Interests |  |  |  |  |  |  |  |
Goodwill |  |  | ₨ 1,629,510.3 | $ 19,074.2 | ₨ 1,629,510.3 | $ 19,074.2 |  | ₨ 74,937.9
eHDFC [Member] |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |
Common equity share issued (3,110,396,492 shares of the Bank) | ₨ 5,292,028.6 |  |  |  |  |  | $ 61,945.7 |
Share-based compensation | 35,240.7 |  |  |  |  |  | 412.5 |
Share warrants | 10,472.2 |  |  |  |  |  | 122.6 |
Fair value of total consideration transferred | 5,337,741.5 | $ 62,480.8 |  |  |  |  |  |
Settlement of pre-existing relationship | (69,312.6) |  |  |  |  |  | (811.3) |
Investment in the Bank by eHDFC | (1,981,494.4) |  |  |  |  |  | (23,194.4) |
Fair value of net purchase consideration transferred | 3,286,934.5 | 38,475.1 |  |  |  |  |  |
Acquisition-related costs | 1,900.0 | $ 22.2 |  |  |  |  |  |
A. Recognised amounts of identifiable assets acquired |  |  |  |  |  |  |  |
Cash and due from banks | 10,344.1 |  |  |  |  |  | 121.1 |
Investment securities | 2,842,356.2 |  |  |  |  |  | 33,271.2 |
Loans - Net | 6,428,635.4 |  |  |  |  |  | 75,250.3 |
Accrued interest receivable | 37,276.7 |  |  |  |  |  | 436.3 |
Property and equipment | 39,136.2 |  |  |  |  |  | 458.1 |
Identified intangibles assets | 1,434,818.1 |  |  |  |  |  | 16,795.2 |
Other assets | 622,978.8 |  |  |  |  |  | 7,292.3 |
Separate account assets | 857,528.7 |  |  |  |  |  | 10,037.8 |
Total estimated assets acquired | 12,273,074.2 |  |  |  |  |  | 143,662.3 |
B. Recognized amounts of identifiable liabilities assumed and Noncontrolling Interests |  |  |  |  |  |  |  |
Deposits | 1,571,204.5 |  |  |  |  |  | 18,391.7 |
Accrued expenses and other liabilities | 781,742.3 |  |  |  |  |  | 9,150.7 |
Borrowings | 4,977,276.5 |  |  |  |  |  | 58,261.5 |
Separate account liabilities | 857,528.7 |  |  |  |  |  | 10,037.8 |
Liabilities on policies in force | 1,499,749.1 |  |  |  |  |  | 17,555.3 |
Noncontrolling Interest in eHDFC subsidiaries | 926,787.1 |  |  |  |  |  | 10,848.5 |
Total estimated liabilities assumed | 10,614,288.2 |  |  |  |  |  | 124,245.5 |
Goodwill | ₨ 1,628,148.5 |  |  |  |  |  | $ 19,058.3 |

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- Definition The liabilities assumed for each amount of liabilities recorded in a transaction with the acquire that is recognized being liabilities at fair value held for benefit of separate account policyholder. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
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- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
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- Definition Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
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- Definition Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
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