v3.25.2
Gratuity and other post-employment benefit plans - Summary of Employee Benefit Expense (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Mar. 31, 2023
INR (₨)
Net employees benefit expense recognised in employee cost        
Net benefit expense ₨ 41 $ 0 ₨ 36 ₨ 28
Contribution to provident fund and other fund charged to consolidated statement of profit or loss (inclusive of amount capitalised in different projects) 150 2 126 102
Defined Benefit Gratuity Plan [Member]        
Net employees benefit expense recognised in employee cost        
Current service cost 95 1 73 52
Interest cost on benefit obligation 20 0 16 12
Net benefit expense 115 1 89 64
Net (expense) / income recognised in OCI 50 1 (18) 3
Defined Contribution Plan [Member]        
Net employees benefit expense recognised in employee cost        
Contribution to provident fund and other fund charged to consolidated statement of profit or loss (inclusive of amount capitalised in different projects) ₨ 347 $ 4 ₨ 311 ₨ 210