XML 98 R26.htm IDEA: XBRL DOCUMENT
v3.20.4

Introduction - Foreign exchange rates (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Bolivia |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 6.91 | 6.91 |
Change in closing foreign exchange rate | 0 |  |
Average foreign exchange rate | 6.91 | 6.91 | 6.91
Change in average foreign exchange rate | 0 |  |
Chad |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Average foreign exchange rate |  |  | 571
Colombia |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 3,432.50 | 3,277 |
Change in closing foreign exchange rate | 0.047 |  |
Average foreign exchange rate | 3,695 | 3,296 | 2,973
Change in average foreign exchange rate | 0.121 |  |
Costa Rica, Colones |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 617.30 | 576 |
Change in closing foreign exchange rate | 0.071 |  |
Average foreign exchange rate | 590 | 588 | 578
Change in average foreign exchange rate | 0.003 |  |
Ghanaian cedi |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 5.87 | 5.73 |
Change in closing foreign exchange rate | 0.024 |  |
Average foreign exchange rate | 5.75 | 5.33 | 4.63
Change in average foreign exchange rate | 0.079 |  |
Guatemala, Quetzales |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 7.79 | 7.70 |
Change in closing foreign exchange rate | 0.012 |  |
Average foreign exchange rate | 7.73 | 7.71 | 7.52
Change in average foreign exchange rate | 0.003 |  |
Honduras, Lempiras |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 24.20 | 24.72 |
Change in closing foreign exchange rate | (0.021) |  |
Average foreign exchange rate | 24.65 | 24.59 | 23.99
Change in average foreign exchange rate | 0.002 |  |
Euro Member Countries, Euro |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 0.82 | 0.89 |
Change in closing foreign exchange rate | (0.082) |  |
Average foreign exchange rate | 0.87 | 0.89 | 0.85
Change in average foreign exchange rate | (0.021) |  |
Nicaragua, Cordobas |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 34.82 | 33.84 |
Change in closing foreign exchange rate | 0.029 |  |
Average foreign exchange rate | 34.34 | 33.12 | 31.55
Change in average foreign exchange rate | 0.037 |  |
Paraguay |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 6,900.11 | 6,453 |
Change in closing foreign exchange rate | 0.069 |  |
Average foreign exchange rate | 6,758 | 6,232 | 5,743
Change in average foreign exchange rate | 0.084 |  |
Sweden, Kronor |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 8.23 | 9.37 |
Change in closing foreign exchange rate | (0.121) |  |
Average foreign exchange rate | 9.16 | 9.43 | 8.71
Change in average foreign exchange rate | (0.029) |  |
Tanzania |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 2,318.95 | 2,299 |
Change in closing foreign exchange rate | 0.009 |  |
Average foreign exchange rate | 2,312 | 2,304 | 2,274
Change in average foreign exchange rate | 0.003 |  |
United Kingdom, Pounds |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 0.73 | 0.75 |
Change in closing foreign exchange rate | (0.030) |  |
Average foreign exchange rate | 0.77 | 0.78 | 0.75
Change in average foreign exchange rate | (0.012) |  |
Panama |  |  |
Foreign Exchange Rate [Line Items] |  |  |
Closing foreign exchange rate | 1 |  |

X
- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_AverageForeignExchangeRate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ClosingForeignExchangeRate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Change In Average Foreign Exchange Rate + References No definition available. + Details
Name: | tigo_ChangeInAverageForeignExchangeRate
Namespace Prefix: | tigo_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change In Closing Foreign Exchange Rate + References No definition available. + Details
Name: | tigo_ChangeInClosingForeignExchangeRate
Namespace Prefix: | tigo_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Foreign Exchange Rate [Table] + References No definition available. + Details
Name: | tigo_ForeignExchangeRateLineItems
Namespace Prefix: | tigo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CurrencyAxis=currency_BOB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_XAF
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_COP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_CRC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_GHS
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_GTQ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_HNL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_NIO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_PYG
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_SEK
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_TZS
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_GBP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_PAB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |