Acquisition and sale of businesses and brands and purchase of non-controlling interests - Assets and liabilities held for sale, narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Dec. 17, 2025 |
|
| EABL and Kenyan spirits prospective sale | ||
| Disclosure Of Assets and Liabilities Held For Sale [Line Items] | ||
| Disposal, exchange losses expected to be recycled to the Income Statement | $ 85 | |
| Diageo Kenya Limited | ||
| Disclosure Of Assets and Liabilities Held For Sale [Line Items] | ||
| Disposal, percentage of interest disposed | 100.00% | |
| East African Breweries Limited | ||
| Disclosure Of Assets and Liabilities Held For Sale [Line Items] | ||
| Disposal, percentage of interest disposed | 65.00% |