Financial instruments and risk management - Fair value measurement - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of detailed information about financial instruments [line items] | ||
| Current financial liabilities | $ 9,217 | $ 10,158 |
| Industrias Licoreras de Guatemala | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Proportion of ownership interest in investment by external party | 50.00% | |
| Industrias Licoreras de Guatemala | Level 3 | Zacapa financial liability | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Current financial liabilities | $ 112 | $ 101 |
| Zacapa rum | Zacapa financial liability | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Increase (decrease) in fair value liability due to increase in observable input | $ 5 |