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SHARE-BASED COMPENSATION - Disclosure of DSUs and PSUs issued and outstanding (Details) - Share Share in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Deferred Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Outstanding at beginning balance | 2,354 | 2,328
Granted | 572 | 682
Settled | (803) | (656)
Outstanding at ending balance | 2,123 | 2,354
Performance Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Outstanding at beginning balance | 1,675 | 1,210
Granted | 825 | 875
Settled | (400) | (410)
Outstanding at ending balance | 2,100 | 1,675

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- Definition 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. + References No definition available. + Details
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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of other equity instruments (ie other than share options) settled in a share-based payment arrangement. + References No definition available. + Details
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