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Capital structure and financing - C.7.4. Call and put options (Details) $ in Millions, $ in Billions | Oct. 12, 2023 COP ($) | Oct. 12, 2023 USD ($) | Sep. 30, 2024 USD ($)
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Disclosure of detailed information about business combination [line items] |  |  |
Put option liability |  |  | $ 79
Tigo-UNE |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Proportion of voting rights held in joint venture | 50.00% | 50.00% |
Other cash payments to acquire interests in joint ventures, classified as investing activities | $ 300 | $ 74 |
Undiscounted cash outflow required to repurchase derecognised financial assets | $ 330 |  |

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