Financial Instruments - Summary of Income from Financial Assets (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Income, expense, gains or losses of financial instruments [abstract] | |||
| Interest income on financial assets carried at amortized cost | $ 180 | $ 128 | $ 107 |
| Interest income on financial assets fair valued through other comprehensive income | 124 | 122 | 119 |
| Gain / (loss) on investments carried at fair value through profit or loss | 34 | 34 | 18 |
| Income from financial assets | $ 338 | $ 284 | $ 244 |