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Sales/transfer of receivables - Summary of Cash Flows Between Transferee and Transferor (Detail) ₨ in Millions, $ in Millions | 12 Months Ended |
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Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2025 USD ($)
Transfers and Servicing [Abstract] |  |  |  |
Collections against securitized receivables/transfers | ₨ 38,841.9 | $ 454.7 | ₨ 0.0 |
Payments made | 32,758.6 | 383.5 | 0.0 |
Cash flows on retained interests | 6,083.3 | $ 71.2 | 0.0 |
Transferred receivables with continuing involvement | 332,411.5 |  | 0.0 | $ 3,891.0
Delinquencies | 15.4 |  | 0.0 | 0.2
Retained interest in sold receivables | ₨ 37,189.9 |  | ₨ 0.0 | $ 435.3

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- Definition Cash Flows between a transferor and a transferee attributable to collections reinvested in revolving period transfers related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-3 + Details
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- Definition Cash flows between transferee and transferor in payment of the transferor's beneficial interest related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction. + References No definition available. + Details
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- Definition Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition This is the principal amount of loans (across all types of loans) that are overdue in payment by a set number of days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition The carrying amount (fair value) as of the balance sheet date of the transferor's interests in transferred financial assets (typically securitized receivables, generally not involved in the collection of principal) following transfer of significant portions of such financial instruments to other parties. Such interests could be ancillary cash flows and interest-only strips. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition Amount of cash inflow from collection on beneficial interest in securitization of receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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- References No definition available. + Details
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