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Financial instruments - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial liability including put option | $ 470 | $ 371 | $ 348 |
Fair value of gross borrowings | 21,720 |  | (21,501) |
Level 3 |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Contingent consideration included in other financial liabilities | 419 | 599 | 443 |
Increase (Decrease) in financial assets | 4 | 32 |  |
Level 1 | Fair value |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value of gross borrowings | 21,050 |  | 20,663 |
Contingent consideration payable | Volume, Measurement Input |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Increase in fair value of liability | 25 |  |  |
Decrease in fair value of liability | $ 70 |  |  |
Percentage of reasonably possible increase in unobservable input, liabilities | 10.00% |  |  |
Percentage of reasonably possible decrease in unobservable input, liabilities | 20.00% |  |  |
Contingent consideration payable | Cash Flows, Measurement Input |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Increase in fair value of liability | $ 30 |  |  |
Decrease in fair value of liability | $ 30 |  |  |
Percentage of reasonably possible increase in unobservable input, liabilities | 10.00% |  |  |
Percentage of reasonably possible decrease in unobservable input, liabilities | 10.00% |  |  |
Contingent consideration payable | Level 3 |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Contingent consideration included in other financial liabilities | $ 239 | $ 375 | 245 | $ 391
Total for all business combinations |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Contingent consideration payment period | 6 years |  |  |
Total for all business combinations | Contingent consideration payable | Undiscounted amount |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Contingent consideration included in other financial liabilities | $ 263 |  | 273 |
Total for all business combinations | Contingent consideration payable | Volume, Measurement Input |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Contingent consideration included in other financial liabilities | 148 |  | 153 |
Total for all business combinations | Contingent consideration payable | Performance obligations [domain] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Contingent consideration included in other financial liabilities | $ 91 |  | 92 |
Industrias Licoreras de Guatemala |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Equity stake held by external party | 50.00% |  |  |
Industrias Licoreras de Guatemala | Level 3 |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Financial liability including put option | $ 180 |  | $ 198 |

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