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Performance B.3. Segmental Information - Revenue from contracts with customers (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | $ 4,074 | $ 4,076 | [1] | $ 4,043 | [1]
Service revenue |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 3,861 | 3,876 |  | 3,820 |
Mobile |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 2,248 | 2,281 |  | 2,343 |
Cable and other fixed services |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 1,568 | 1,553 |  | 1,437 |
Other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 46 | 41 |  | 39 |
Telephone and equipment and other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 213 | $ 200 |  | $ 223 |
Latin America |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 3,548 |  |  |  |
Latin America | Service revenue |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 3,336 |  |  |  |
Latin America | Cable and other fixed services |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 1,556 |  |  |  |
Latin America | Other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 42 |  |  |  |
Africa |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 526 |  |  |  |
Africa | Service revenue |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 526 |  |  |  |
Africa | Cable and other fixed services |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 12 |  |  |  |
Africa | Other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 3 |  |  |  |
Over time | Mobile |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 2,102 |  |  |  |
Over time | Latin America | Mobile |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 1,701 |  |  |  |
Over time | Africa | Mobile |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 401 |  |  |  |
Point in time | Cable and other fixed services |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 147 |  |  |  |
Point in time | Telephone and equipment and other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 213 |  |  |  |
Point in time | Latin America | Cable and other fixed services |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 37 |  |  |  |
Point in time | Latin America | Telephone and equipment and other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 212 |  |  |  |
Point in time | Africa | Cable and other fixed services |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | 109 |  |  |  |
Point in time | Africa | Telephone and equipment and other |  |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |  |
Revenue | $ 1 |  |  |  |
[1] | 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.

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2018-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2018-03-01&anchor=para_113_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2018-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2018-03-01&anchor=para_114&doctype=Standard -URIDate 2018-03-16 + Details
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