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v3.25.2

Fair value measurement - Investments Measured at Fair Value on Recurring Basis (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | ₨ 625,388.5 | $ 7,320.5 | ₨ 461,245.3
Securities Available-for-Sale |  | 9,910,174.3 | 116,003.4 | 8,295,487.1
Separate Account Assets |  | 1,016,281.4 | 11,896.1 | 955,416.3
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 340,388.3 |  | 290,951.1
Securities Available-for-Sale |  | 1,435,936.3 |  | 548,944.7
Separate Account Assets |  | 873,154.4 |  | 808,309.4
Fair Value Measurements Using Significant other observable inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 250,009.3 |  | 148,296.2
Securities Available-for-Sale |  | 8,360,598.8 |  | 7,608,007.7
Separate Account Assets |  | 143,127.0 |  | 147,106.9
Fair Value Measurements Using Significant unobservable inputs (Level 3) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 34,990.9 |  | 21,998.0
Securities Available-for-Sale |  | 113,639.2 |  | 138,534.7
Separate Account Assets |  | 0.0 |  | 0.0
Fair Value, Measurements, Recurring |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 625,388.5 |  | 461,245.3
Securities Available-for-Sale |  | 9,910,174.3 |  | 8,295,487.1
Equity securities | [1] | 129,984.8 |  | 71,449.1
Separate Account Assets |  | 1,016,281.4 |  | 955,416.3
Total |  | 11,681,829.0 | 136,741.5 | 9,783,597.8
Liabilities on policies in force |  | 482.9 |  | 237.2
Total |  | 482.9 | 5.7 | 237.2
Fair Value, Measurements, Recurring | Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 336,658.0 |  | 290,951.1
Securities Available-for-Sale |  | 1,435,936.2 |  | 548,944.7
Equity securities | [1] | 20,404.1 |  | 24,545.8
Separate Account Assets |  | 873,154.4 |  | 808,309.4
Total |  | 2,666,152.7 | 31,208.6 | 1,672,751.0
Liabilities on policies in force |  | 0.0 |  | 0.0
Total |  | 0.0 |  | 0.0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant other observable inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 253,739.6 |  | 148,296.2
Securities Available-for-Sale |  | 8,360,598.9 |  | 7,608,007.7
Equity securities | [1] | 109,013.3 |  | 46,571.0
Separate Account Assets |  | 143,127.0 |  | 147,106.9
Total |  | 8,866,478.8 | 103,786.5 | 7,949,981.8
Liabilities on policies in force |  | 482.9 |  | 237.2
Total |  | 482.9 | 5.7 | 237.2
Fair Value, Measurements, Recurring | Fair Value Measurements Using Significant unobservable inputs (Level 3) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Trading account securities |  | 34,990.9 |  | 21,998.0
Securities Available-for-Sale |  | 113,639.2 |  | 138,534.7
Equity securities | [1] | 567.4 |  | 332.3
Separate Account Assets |  | 0.0 |  | 0.0
Total |  | 149,197.5 | 1,746.4 | 160,865.0
Liabilities on policies in force |  | 0.0 |  | 0.0
Total |  | ₨ 0.0 |  | ₨ 0.0
[1] | Equity securities classified within other assets.

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