v3.25.2
Financial Instruments - Summary of Reconciliation of Cash Flow Hedge Reserve (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of detailed information about financial instruments [abstract]      
Balance at the beginning of the period $ 1 $ 0 $ 1
Gain / (Loss) recognized in other comprehensive income during the period (1) 1 12
Amount reclassified to profit or loss during the period (3) 1 (13)
Tax impact on above 1 (1)  
Balance at the end of the period $ (2) $ 1 $ 0