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v3.25.2

Insurance services - Summary of a Roll Forward of URR (Detail) ₨ in Millions, $ in Millions | 12 Months Ended
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Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨)
Unearned Revenue Reserve [Line Items] |  |  |
Opening balance | ₨ 988.8 | $ 11.6 | ₨ 0.0
Capitalizations | 2,893.9 | 33.9 | 1,036.5
Amortization | (316.0) | (3.7) | (38.9)
Experience Adjustment | (138.6) | (1.7) | (8.8)
Closing balance | 3,428.1 | $ 40.1 | 988.8
Unit-Linked Life [Member] |  |  |
Unearned Revenue Reserve [Line Items] |  |  |
Opening balance | 945.2 |  | 0.0
Capitalizations | 2,772.3 |  | 991.8
Amortization | (303.5) |  | (37.9)
Experience Adjustment | (132.2) |  | (8.7)
Closing balance | 3,281.8 |  | 945.2
Unit-Linked Pension [Member] |  |  |
Unearned Revenue Reserve [Line Items] |  |  |
Opening balance | 43.6 |  | 0.0
Capitalizations | 121.6 |  | 44.7
Amortization | (12.5) |  | (1.0)
Experience Adjustment | (6.4) |  | (0.1)
Closing balance | ₨ 146.3 |  | ₨ 43.6

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