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The Millicom Group - A.2. Joint Ventures (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 13, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2018
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Statutory reserves unavailable for distribution |  | $ 472.0 |  | $ 486.0 |  | $ 310.0 |  |
Profit (loss) from other joint ventures and associates, net |  | 0.0 | [1] | (40.0) | [2] | (1.0) | [2] |
Increase (Decrease) Joint Ventures [Roll Forward] |  |  |  |  |  |  |  |
Investments in joint ventures |  | 596.0 |  |  |  |  |  |
Investments in joint ventures |  | 590.0 |  | 596.0 |  |  |  |
Honduras joint ventures |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  |  |  |  |  |  |  | 50.00%
Joint ventures |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Total net assets |  | 401.0 |  | 406.0 |  |  |  |
Statutory reserves unavailable for distribution |  | 3.0 |  | 3.0 |  |  |  |
Guatemala and Honduras Joint Ventures |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Cash repatriated from joint venture |  |  |  | 62.0 |  |  |  |
Guatemala and Honduras Joint Ventures | Trade receivables, net |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Cash repatriated from joint venture |  |  |  | 13.0 |  |  |  |
Honduras joint ventures |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Total net assets |  | (17.0) |  | (18.0) |  | (8.0) |  |
Cash repatriated from joint venture |  | 85.0 |  |  |  |  |  |
Dividends and advances paid to Millicom |  | $ 9.0 |  | $ 0.0 |  | $ 24.0 |  |
Proportion of ownership interest in joint venture |  | 66.70% |  | 66.70% |  | 66.70% |  |
Increase (Decrease) Joint Ventures [Roll Forward] |  |  |  |  |  |  |  |
Investments in joint ventures |  | $ 596.0 |  | $ 610.0 |  |  |  |
Results for the year |  | 32.0 |  | 27.0 |  | $ 27.0 |  |
Dividends declared during the year |  | (35.0) |  | (34.0) |  |  |  |
Currency exchange differences |  | (7.0) |  | (7.0) |  |  |  |
Capital increase |  | 3.0 |  |  |  |  |  |
Investments in joint ventures |  | $ 590.0 |  | $ 596.0 |  | 610.0 |  |
Telefonica Celular S.A |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  | 66.70% |  | 66.70% |  |  |  |
Navega S.A. de CV |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  | 66.70% |  | 66.70% |  |  |  |
Guatemala joint ventures |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Dividends and advances paid to Millicom |  |  |  | $ 13.0 |  | 47.0 |  |
Increase (Decrease) Joint Ventures [Roll Forward] |  |  |  |  |  |  |  |
Results for the year |  |  |  | $ 183.0 |  | 144.0 |  |
Ghana |  |  |  |  |  |  |  |
Increase (Decrease) Joint Ventures [Roll Forward] |  |  |  |  |  |  |  |
Results for the year |  |  |  |  |  | $ 0.0 |  |
Bharti Airtel Ghana Holdings B.V. |  |  |  |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture |  | 50.00% |  | 50.00% |  |  |  |
Increase (Decrease) Joint Ventures [Roll Forward] |  |  |  |  |  |  |  |
Payments for reimbursements of certain bank facilities | $ 37.5 |  |  |  |  |  |  |
[1] | Tigo Guatemala is fully consolidated since the acquisition of the remaining 45% shareholding on November 12, 2021. See note A.1.2. for further details. As a result, numbers might not be directly comparable with previous years' figures.
[2] | Re-presented for discontinued operations (see note A.4.)

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