Net Debt - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disclosure of net debt [line items] | ||
| Cash and cash equivalents restricted by legal or contractual arrangements | $ 125 | $ 112 |
| Defaults on loans payable | 0 | |
| Revolving credit facility [member] | ||
| Disclosure of net debt [line items] | ||
| Revolving credit facility, maximum amount | 5,500 | |
| Commercial paper, amount drawn | ||
| Revolving credit facility, maturity period | 5-year maturity, with two one-year extension options |