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Capital structure and financing - C.3.2. Bank and Development Financial Institution financing (Details) |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 04, 2017 USD ($) | Jan. 30, 2017 USD ($) | Apr. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Jan. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | [1] | Apr. 30, 3018 USD ($) | Oct. 31, 2018 USD ($) | Jun. 30, 2018 USD ($) | Jul. 04, 2017 PYG (₲) | Jun. 30, 2017 USD ($) payment | May 30, 2017 USD ($) | Jul. 31, 2016 USD ($) | Apr. 15, 2016 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | $ 1,613,000,000 | $ 1,198,000,000 |  |  |  |  |  |  |  |  |  |
Repayments of borrowings, classified as financing activities |  |  |  |  |  | 546,000,000 | 1,195,000,000 | [1] | $ 821,000,000 |  |  |  |  |  |  |  |
PYG Long-Term Loan, 9% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 90,000,000 | 106,000,000 |  |  |  |  |  |  |  |  |  |
PYG Long-Term Loan, 10.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 61,000,000 | 65,000,000 |  |  |  |  |  |  |  |  |  |
Borrowings term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings face amount | $ 66,000,000 |  |  |  |  |  |  |  |  |  |  |  | ₲ 367,000,000,000 |  |  |  |
PYG Long-Term Loan, 10.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 9,000,000 | 0 |  |  |  |  |  |  |  |  |  |
PYG Long-Term Loan, 8.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 19,000,000 | 0 |  |  |  |  |  |  |  |  |  |
USD Long-Term Loan, 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 15,000,000 | 0 |  |  |  |  |  |  |  |  |  |
USD Long-Term Loan, 3.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 9,000,000 | 0 |  |  |  |  |  |  |  |  |  |
BOB Long-Term Loan, 4.30% -1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 10,000,000 | 0 |  |  |  |  |  |  |  |  |  |
BOB Long-Term Loan, 4.30% - 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 10,000,000 | 0 |  |  |  |  |  |  |  |  |  |
USD Long-Term Loans, Costa Rica |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 148,000,000 | 76,000,000 |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  |  |  |  |  |  |  | $ 150,000,000 |  |  |  |  |  |  |
Repayments of borrowings, classified as financing activities |  |  | $ 72,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
USD Long-Term Loans, Chad |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 1,000,000 | 3,000,000 |  |  |  |  |  |  |  |  |  |
USD Long-Term Loans, Rwanda |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 0 | 40,000,000 |  |  |  |  |  |  |  |  |  |
Repayments of borrowings, classified as financing activities |  |  |  |  | $ 40,000,000 |  |  |  |  |  |  |  |  |  |  |  |
USD Long-Term Loans, Tanzania (Zantel) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 90,000,000 | 96,000,000 |  |  |  |  |  |  |  |  |  |
USD Short-Term Loans, Luxembourg |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 250,000,000 | 0 |  |  |  |  |  |  |  |  |  |
MIC S.A. Bridge Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 250,000,000 |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |
MIC S.A. Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings term |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
MIC S.A. Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |
COP Long-Term Loans, Colombia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 277,000,000 | 363,000,000 |  |  |  |  |  |  |  |  |  |
Repayments of borrowings, classified as financing activities |  |  |  | $ 34,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
USD Long-Term Loans, Colombia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 298,000,000 | 297,000,000 |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  |  |
Number of payments | payment |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |
Periodic payments |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |  |
USD Senior Unsecured Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 50,000,000 | 50,000,000 |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |  | $ 50,000,000
USD Credit Facility, El Salvador Due 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 24,000,000 | 29,000,000 |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,000,000
USD Credit Facility, El Salvador Due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 50,000,000 | 50,000,000 |  |  |  |  |  |  |  |  |  |
Borrowings term |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |
USD Credit Facility, El Salvador, Due 2023 - 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 100,000,000 | 0 |  |  |  |  |  |  |  |  |  |
Borrowings term |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
USD Credit Facility, El Salvador, Due 2023 - 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | 50,000,000 | 0 |  |  |  |  |  |  |  |  |  |
Borrowings face amount |  |  |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Other Long-Term Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans received |  |  |  |  |  | $ 51,000,000 | $ 25,000,000 |  |  |  |  |  |  |  |  |  |
Floating interest rate | USD Long-Term Loans, Costa Rica |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 3.50% |  |  |  |  |  |  |  |  |  |  |
Floating interest rate | USD Long-Term Loans, Chad |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Floating interest rate | USD Long-Term Loans, Rwanda |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 2.90% |  |  |  |  |  |  |  |  |  |  |
Floating interest rate | USD Long-Term Loans, Tanzania (Zantel) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |
Floating interest rate | USD Short-Term Loans, Luxembourg |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | PYG Long-Term Loan, 9% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 9.00% |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | PYG Long-Term Loan, 10.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 10.10% |  |  |  |  | 10.10% |  |  |  |  |  |  | 10.10% |  |  |  |
Fixed interest rate | PYG Long-Term Loan, 10.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 10.25% |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | PYG Long-Term Loan, 8.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 8.90% |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | USD Long-Term Loan, 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | USD Long-Term Loan, 3.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 3.80% |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | BOB Long-Term Loan, 4.30% -1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 4.30% |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate | BOB Long-Term Loan, 4.30% - 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 4.30% |  |  |  |  |  |  |  |  |  |  |
LIBOR | USD Short-Term Loans, Luxembourg |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |
LIBOR | MIC S.A. Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.25% |
LIBOR | USD Long-Term Loans, Colombia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  | 2.50% |  |  |
LIBOR | USD Senior Unsecured Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  | 3.00% |  | 3.00%
LIBOR | USD Credit Facility, El Salvador Due 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 2.25% |  |  |  |  |  |  |  |  |  |  | 2.25%
LIBOR | USD Credit Facility, El Salvador Due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 3.15% |  |  |  |  |  |  |  |  |  |  |
LIBOR | USD Credit Facility, El Salvador, Due 2023 - 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 2.55% |  |  |  |  |  |  |  |  |  |  |
LIBOR | USD Credit Facility, El Salvador, Due 2023 - 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
IBR | COP Long-Term Loans, Colombia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to interest rate basis |  |  |  |  |  | 4.10% |  |  |  |  |  |  |  |  |  |  |
Interest rate and currency swap | USD Long-Term Loans, Costa Rica |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount |  |  |  |  |  |  |  |  |  |  |  | $ 35,000,000 |  |  |  |  |
Interest rate swap | USD Long-Term Loans, Costa Rica |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount |  |  |  |  |  |  |  |  |  |  |  | $ 35,000,000 |  |  |  |  |
Interest rate swap | USD Credit Facility, El Salvador, Due 2023 - 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount |  |  |  | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Re-presented for discontinued operations (shown in note A.4. and E.3.2.). Not restated for the application of IFRS 15 and 9, as the Group elected the modified retrospective approach for both standards.

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- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_d&doctype=Standard -URIDate 2018-03-16 + Details
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