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Insurance services - Summary of Bank's Liability for Future Policy Benefits on the Consolidated Balance Sheets (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨)
--- | --- | --- | ---
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | ₨ 2,087,603.8 | $ 24,436.3 | ₨ 1,671,384.1
Non Par Protection [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 197,562.8 | 2,312.5 | 166,649.2
Non Par Riders [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 89.7 | 1.0 | 207.0
Non Par Savings [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 740,769.5 | 8,671.1 | 551,186.3
Non Par Pension [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 17,986.6 | 210.5 | 17,609.5
Individual Annuity [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 319,760.4 | 3,743.0 | 255,858.7
Individual Health [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 275.4 | 3.2 | 410.4
Par Life [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 654,173.3 | 7,657.4 | 561,076.4
Par Pension [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | 15,878.0 | 185.9 | 16,294.1
Group Non par Life [Member] |  |  |
Liability for Future Policy Benefits [Line Items] |  |  |
Future policy benefits | ₨ 141,108.1 | $ 1,651.7 | ₨ 102,092.5

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- Definition The aggregate amount of policy reserves (provided for future obligations including unpaid claims and claims adjustment expenses) and policy benefits (liability for future policy benefits) as of the balance sheet date; grouped amount of all the liabilities associated with the company's insurance policies. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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