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v3.25.2

Retirement Benefits - Additional Information (Detail) ₨ in Thousands, $ in Millions | 12 Months Ended
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Mar. 31, 2025 INR (₨) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 INR (₨) | Mar. 31, 2023 INR (₨)
Superannuation |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution plan, employer annual contribution as a percentage of eligible annual salary | 13.00% | 13.00% |  |
Defined contribution plan, employer contribution recognized as an expense | ₨ 3,576,800 |  | ₨ 3,106,600 | ₨ 2,322,000
Superannuation | Managing Director, Executive Directors and for certain employees of CBoP |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution plan, employer annual contribution as a percentage of eligible annual salary | 15.00% | 15.00% |  |
Provident Fund |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution plan, employer annual contribution as a percentage of eligible annual salary | 12.00% | 12.00% |  |
Defined contribution plan, employer contribution recognized as an expense | ₨ 12,569,000 |  | 11,683,900 | 8,238,200
Defined contribution plan - contribution to Pension Scheme administered by Regional Provident Fund Commissioner, percentage considered - lower of the percentage of employees eligible salary or fixed amount | 8.33% | 8.33% |  |
Provident Fund | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer contributions | ₨ 15 |  |  |
National Pension Scheme [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution plan, employer contribution recognized as an expense | ₨ 310,000 |  | 161,600 | ₨ 78,000
Gratuity |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, number of days of eligible salary payable for each completed year of service | 15 days | 15 days |  |
Defined benefit plan, expected contribution to the plan for the next fiscal year | ₨ 2,686,800 |  |  |
Defined benefit plan, accumulated benefit obligation | 15,065,600 |  | 12,858,700 |
Employer contributions | 1,010,200 | $ 11.8 | 717,900 |
Gratuity | Vested accumulated benefit obligation |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, accumulated benefit obligation | ₨ 13,143,100 |  | 11,691,600 |
Pension |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, vesting period | 15 years | 15 years |  |
Defined benefit plan, expected contribution to the plan for the next fiscal year |  |  | 129,800 |
Defined benefit plan, accumulated benefit obligation | ₨ 833,900 |  | 637,600 |
Employer contributions | ₨ 99,900 | $ 1.2 | 241,700 |
Defined benefit plan minimum service period needed for annuity offer | 15 years | 15 years |  |
Pension | Centurion Bank of Punjab Limited |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, employer contribution as a percentage of basic salary | 10.00% | 10.00% |  |
Pension | Centurion Bank of Punjab Limited | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit pension plan, Service period of employees for whom contribution made stand frozen and will be converted into an annuity on separation | 10 years | 10 years |  |
Pension | Centurion Bank of Punjab Limited | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit pension plan, Service period of employees for whom contribution made stand frozen and will be converted into an annuity on separation | 15 years | 15 years |  |
Pension | Vested accumulated benefit obligation |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, accumulated benefit obligation | ₨ 545,700 |  | ₨ 352,400 |

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