v3.25.2
Employee Benefits - Summary of Cost Recognized in Net Profit in Statement of Comprehensive Income Apportioned (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure Of Defined Benefit Plans [Line Items]      
Cost $ 10,165 $ 9,981 $ 9,729
Gratuity      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 39 37 34
Gratuity | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 35 34 31
Gratuity | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 3 2 2
Gratuity | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 1 1 1
Pension      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 6 2 5
Pension | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 6 2 5
Superannuation      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 61 62 60
Superannuation | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 55 56 55
Superannuation | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 4 4 3
Superannuation | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 2 2 2
Provident Fund      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 156 152 148
Provident Fund | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 141 137 134
Provident Fund | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 10 10 9
Provident Fund | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 5 5 5
Employee Benefit Cost      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost 10,165 9,981 9,729
Employee Benefit Cost | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost 9,151 8,998 8,826
Employee Benefit Cost | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost 677 656 598
Employee Benefit Cost | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost $ 337 $ 327 $ 305