v3.26.1
Employee Benefits - Summary of Cost Recognized in Net Profit in Statement of Comprehensive Income Apportioned (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure Of Defined Benefit Plans [Line Items]      
Cost $ 10,882 $ 10,165 $ 9,981
Gratuity      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 184 39 37
Gratuity | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 165 35 34
Gratuity | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 13 3 2
Gratuity | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 6 1 1
Pension      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 6 6 2
Pension | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 6 6 2
Superannuation      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 65 61 62
Superannuation | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 58 55 56
Superannuation | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 5 4 4
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 171 156 152
Provident Fund | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 153 141 137
Provident Fund | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 12 10 10
Provident Fund | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Defined benefit plans 6 5 5
Employee Benefit Cost      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost 10,882 10,165 9,981
Employee Benefit Cost | Cost of Sales      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost 9,739 9,151 8,998
Employee Benefit Cost | Sales and Marketing Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost 766 677 656
Employee Benefit Cost | Administrative Expenses      
Disclosure Of Defined Benefit Plans [Line Items]      
Cost $ 377 $ 337 $ 327