Financial Risk Management - Summary of Carrying Amounts of Group's Notes and Debentures by Currency and Derivatives Which Hedge (Parenthetical) (Detail) - USD ($) $ in Millions |
Jun. 30, 2025 |
Jun. 30, 2024 |
|---|---|---|
| Disclosure of detailed information about hedged items [line items] | ||
| Borrowings | $ 21,543 | $ 17,602 |
| Fixed interest rate not swapped to floating rate [member] | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Borrowings | $ 525 | $ 532 |