v3.25.2
Financial Instruments - Schedule of Analysis of Foreign Currency Risk From Monetary Assets and Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Mar. 31, 2024
Disclosure Of Financial Instruments [Line Items]    
Net financial assets $ 11,322 $ 10,200
Net financial liabilities (3,468) (3,439)
Foreign Currency Risk    
Disclosure Of Financial Instruments [Line Items]    
Net financial assets 5,298 5,064
Net financial liabilities (2,435) (2,283)
Total 2,863 2,781
Foreign Currency Risk | U.S. Dollars    
Disclosure Of Financial Instruments [Line Items]    
Net financial assets 3,138 3,133
Net financial liabilities (1,539) (1,430)
Total 1,599 1,703
Foreign Currency Risk | Euro    
Disclosure Of Financial Instruments [Line Items]    
Net financial assets 1,379 1,146
Net financial liabilities (440) (405)
Total 939 741
Foreign Currency Risk | United Kingdom Pound Sterling    
Disclosure Of Financial Instruments [Line Items]    
Net financial assets 261 258
Net financial liabilities (120) (85)
Total 141 173
Foreign Currency Risk | Australian Dollars    
Disclosure Of Financial Instruments [Line Items]    
Net financial assets 159 177
Net financial liabilities (83) (97)
Total 76 80
Foreign Currency Risk | Other Currencies    
Disclosure Of Financial Instruments [Line Items]    
Net financial assets 361 350
Net financial liabilities (253) (266)
Total $ 108 $ 84