Employee Benefits - Summary of Sensitivity of Significant Assumptions Used for Valuation of Defined Benefit Obligation (Details) - Benefit Obligations $ in Millions |
Mar. 31, 2025
USD ($)
|
|---|---|
| Gratuity, 1% point increase / decrease | Discount Rate | |
| Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] | |
| Impact from percentage point increase / decrease | $ 16 |
| Gratuity, 1% point increase / decrease | Increase in Compensation Levels | Weighted Average | |
| Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] | |
| Impact from percentage point increase / decrease | 16 |
| Pension, 0.5% point increase / decrease | Discount Rate | |
| Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] | |
| Impact from percentage point increase / decrease | 6 |
| Pension, 0.5% point increase / decrease | Increase in Compensation Levels | Weighted Average | |
| Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] | |
| Impact from percentage point increase / decrease | $ 1 |