Financial Instruments - Summary of Derivative Financial Instruments into Relevant Maturity Groupings (Details) - Derivative Financial Instruments - USD ($) $ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Disclosure Of Financial Instruments [Line Items] | ||
| Nominal value | $ 3,866 | $ 3,455 |
| Exchange Forward And Option Contracts | ||
| Disclosure Of Financial Instruments [Line Items] | ||
| Nominal value | 3,866 | 3,455 |
| Exchange Forward And Option Contracts | Not later than one month [member] | ||
| Disclosure Of Financial Instruments [Line Items] | ||
| Nominal value | 1,814 | 1,304 |
| Exchange Forward And Option Contracts | Later than one month and not later than three months [member] | ||
| Disclosure Of Financial Instruments [Line Items] | ||
| Nominal value | 1,947 | 1,914 |
| Exchange Forward And Option Contracts | Later than three months and not later than one year [member] | ||
| Disclosure Of Financial Instruments [Line Items] | ||
| Nominal value | $ 105 | $ 237 |