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The Millicom Group - A.2.3 Impairment of Investments in Joint Ventures (Details)	Dec. 31, 2019	Dec. 31, 2018
Guatemala joint ventures
Disclosure of joint ventures [line items]
Discount rate applied to cash flow projections	9.50%	11.00%
Honduras joint ventures
Disclosure of joint ventures [line items]
Discount rate applied to cash flow projections	9.70%	10.30%
Ghana
Disclosure of joint ventures [line items]
Growth rate used to extrapolate cash flow projections	3.80%
Discount rate applied to cash flow projections		14.40%
Bottom of range | Guatemala and Honduras Joint Ventures
Disclosure of joint ventures [line items]
Growth rate used to extrapolate cash flow projections	1.10%	3.20%
Top of range | Guatemala and Honduras Joint Ventures
Disclosure of joint ventures [line items]
Growth rate used to extrapolate cash flow projections	1.20%	3.00%

X

- Definition

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

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- Definition

The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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No definition available.

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