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Introduction - Initial application of standards (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | [2] | Jan. 01, 2019 | Jan. 01, 2018
ASSETS |  |  |  |  |  |  |
Investments in joint ventures | $ 2,867 | $ 2,966 |  |  |  |  | $ 2,989
Contract costs, net | 4 | 0 |  |  |  |  | 4
Deferred tax assets | 202 | 180 |  |  |  |  | 191
Other non-current assets | 126 | 113 |  |  |  |  | 113
Trade receivables, net | 343 | 386 |  |  |  |  | 339
Contract assets, net | 37 | 0 |  |  |  |  | 28
LIABILITIES |  |  |  |  |  |  |
Contract liabilities | 87 | 0 | [1] |  |  |  | 51
Provisions and other current liabilities | 494 | 425 | [1] |  |  |  | 379
Current income tax liabilities | 58 | 81 | [1] |  |  |  |
Deferred tax liabilities | 233 | 56 | [1] |  |  |  | 62
EQUITY |  |  |  |  |  |  |
Retained profits and loss for the year | 2,525 | 3,035 |  |  |  |  | 3,045
Non-controlling interests | 249 | 185 | [1] |  |  |  | 181
Revenue | 4,074 | 4,076 | [2] | $ 4,043 |  |  |
Cost of sales | (1,146) | (1,205) | [2] | (1,175) |  |  |
Operating expenses | (1,674) | (1,593) | [2] | (1,627) |  |  |
Share of profit in joint ventures in Guatemala and Honduras | 154 | 140 | [2],[3] | 115 | [3] |  |
Charge for taxes, net | (116) | (158) | [2] | $ (179) |  |  |
Finance lease liabilities | 353 | $ 365 |  |  |  |  |
Increase (decrease) due to application of IFRS 15 [member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Investments in joint ventures | 28 |  |  |  |  |  |
Contract costs, net | 4 |  |  |  |  |  |
Deferred tax assets | 2 |  |  |  |  |  |
Contract assets, net | 37 |  |  |  |  |  |
LIABILITIES |  |  |  |  |  |  |
Contract liabilities | 87 |  |  |  |  |  |
Provisions and other current liabilities | (82) |  |  |  |  |  |
Current income tax liabilities | 3 |  |  |  |  |  |
Deferred tax liabilities | 7 |  |  |  |  |  |
EQUITY |  |  |  |  |  |  |
Retained profits and loss for the year | 57 |  |  |  |  |  |
Non-controlling interests | 3 |  |  |  |  |  |
Revenue | (77) |  |  |  |  |  |
Cost of sales | 48 |  |  |  |  |  |
Operating expenses | 40 |  |  |  |  |  |
Share of profit in joint ventures in Guatemala and Honduras | 2 |  |  |  |  |  |
Charge for taxes, net | (1) |  |  |  |  |  |
Calculated Under Guidance in Effect Prior to Adoption of IFRS 15 [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Investments in joint ventures | 2,839 |  |  |  |  |  |
Contract costs, net | 0 |  |  |  |  |  |
Deferred tax assets | 200 |  |  |  |  |  |
Contract assets, net | 0 |  |  |  |  |  |
LIABILITIES |  |  |  |  |  |  |
Contract liabilities | 0 |  |  |  |  |  |
Provisions and other current liabilities | 576 |  |  |  |  |  |
Current income tax liabilities | 55 |  |  |  |  |  |
Deferred tax liabilities | 226 |  |  |  |  |  |
EQUITY |  |  |  |  |  |  |
Retained profits and loss for the year | 2,468 |  |  |  |  |  |
Non-controlling interests | 246 |  |  |  |  |  |
Revenue | 4,151 |  |  |  |  |  |
Cost of sales | (1,194) |  |  |  |  |  |
Operating expenses | (1,714) |  |  |  |  |  |
Share of profit in joint ventures in Guatemala and Honduras | 152 |  |  |  |  |  |
Charge for taxes, net | $ (115) |  |  |  |  |  |
IFRS 15 [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Investments in joint ventures |  |  |  |  |  |  | 27
Contract costs, net |  |  |  |  |  |  | 4
Deferred tax assets |  |  |  |  |  |  | 0
Other non-current assets |  |  |  |  |  |  | 0
Trade receivables, net |  |  |  |  |  |  | 0
Contract assets, net |  |  |  |  |  |  | 29
LIABILITIES |  |  |  |  |  |  |
Contract liabilities |  |  |  |  |  |  | 51
Provisions and other current liabilities |  |  |  |  |  |  | (46)
Deferred tax liabilities |  |  |  |  |  |  | 7
EQUITY |  |  |  |  |  |  |
Retained profits and loss for the year |  |  |  |  |  |  | 48
Non-controlling interests |  |  |  |  |  |  | 0
IFRS 9 [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Investments in joint ventures |  |  |  |  |  |  | (4)
Contract costs, net |  |  |  |  |  |  | 0
Deferred tax assets |  |  |  |  |  |  | 10
Other non-current assets |  |  |  |  |  |  | (1)
Trade receivables, net |  |  |  |  |  |  | (47)
Contract assets, net |  |  |  |  |  |  | (1)
LIABILITIES |  |  |  |  |  |  |
Contract liabilities |  |  |  |  |  |  | 0
Provisions and other current liabilities |  |  |  |  |  |  | 0
Deferred tax liabilities |  |  |  |  |  |  | (1)
EQUITY |  |  |  |  |  |  |
Retained profits and loss for the year |  |  |  |  |  |  | (38)
Non-controlling interests |  |  |  |  |  |  | $ (5)
Minimum [Member] |  |  |  |  |  |  |
EQUITY |  |  |  |  |  |  |
Revenue From Contracts with Customers, Subscription Period | 12 months |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
EQUITY |  |  |  |  |  |  |
Revenue From Contracts with Customers, Subscription Period | 36 months |  |  |  |  |  |
Forecast [Member] | Increase (Decrease) Due To Application of IFRS 16 [Member] |  |  |  |  |  |  |
EQUITY |  |  |  |  |  |  |
Finance lease liabilities |  |  |  |  |  | $ 600 |
[1] | Not restated for the application of IFRS 15 and 9, as the Group elected the modified retrospective approach for both standards.
[2] | Re-presented for discontinued operations (shown in note A.4.). Not restated for the application of IFRS 15 and 9, as the Group elected the modified retrospective approach for both standards.
[3] | 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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