v3.26.1
Schedule of actuarial assumptions used for estimating defined benefit obligations (Details)
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disclosure of detailed information about borrowings [line items]    
Actuarial assumption of expected rates of salary increases 5.00% 5.00%
Retirement age (years) 65 years  
Mortality table [1] IALM* (2012-14) Ultimate IALM* (2012-14) Ultimate
From 31 to 44 Years [Member]    
Disclosure of detailed information about borrowings [line items]    
Withdrawal rate 2.00% 2.00%
Bottom of range [member]    
Disclosure of detailed information about borrowings [line items]    
Discount rate 6.68% 6.54%
Average expected future working life (years) 3 years 5 months 19 days 3 years 2 months 15 days
Retirement age (years)   60 years
Bottom of range [member] | Upto 30 Years [Member]    
Disclosure of detailed information about borrowings [line items]    
Withdrawal rate 2.00% 2.00%
Bottom of range [member] | Above 44 Years [Member]    
Disclosure of detailed information about borrowings [line items]    
Withdrawal rate 2.00% 2.00%
Top of range [member]    
Disclosure of detailed information about borrowings [line items]    
Discount rate 7.80% 6.85%
Average expected future working life (years) 18 years 5 months 15 days 16 years 1 month 2 days
Retirement age (years)   65 years
Top of range [member] | Upto 30 Years [Member]    
Disclosure of detailed information about borrowings [line items]    
Withdrawal rate 39.00% 27.00%
Top of range [member] | From 31 to 44 Years [Member]    
Disclosure of detailed information about borrowings [line items]    
Withdrawal rate 30.00% 31.00%
Top of range [member] | Above 44 Years [Member]    
Disclosure of detailed information about borrowings [line items]    
Withdrawal rate 19.00% 31.00%
[1] Indian Assured Lives Mortality (2012-14) Ultimate represents published mortality table used for mortality assumption.