v3.25.2
Retirement benefits - Reconciliation of All Plan Investment Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) - Plan investment funds managed by insurance companies
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Defined Benefit Plan Disclosure [Line Items]      
Beginning balance ₨ 859.1 $ 10.1 ₨ 864.5
On merger of eHDFC 0.0 0.0 25.1
Realized interest credited to fund 70.2 0.8 64.0
Contribution during the period 88.6 1.0 70.9
Amount paid towards claim (248.8) (2.9) (165.4)
Ending Balance ₨ 769.1 $ 9.0 ₨ 859.1