v3.25.2
Employee Benefits - Employee Benefit Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure Of Defined Benefit Plans [Line Items]      
Employee benefit cost $ 10,165 $ 9,981 $ 9,729
Employee Benefit Cost      
Disclosure Of Defined Benefit Plans [Line Items]      
Salaries and bonus 9,903 9,729 9,481
Defined contribution plans 80 81 78
Defined benefit plans 182 171 170
Employee benefit cost $ 10,165 $ 9,981 $ 9,729