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Financial Risk Management - Percentage of revenues (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Customer A and Its Affiliates [Member] |  |  |
IFRS Statement [Line Items] |  |  |
Percentage of entity's revenue | 32.60% | 29.50% | 28.10%
Customer B and Its Affiliates [Member] |  |  |
IFRS Statement [Line Items] |  |  |
Percentage of entity's revenue | 6.60% | 8.90% | 12.60%
Customer C [Member] |  |  |
IFRS Statement [Line Items] |  |  |
Percentage of entity's revenue | 12.70% | 5.60% | 5.70%

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The percentage of the entity's revenue. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 8 -IssueDate 2020-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_34&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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- Details
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