SUPPLEMENTAL CASH FLOW INFORMATION - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Statement of cash flows [abstract]
Debt repayments of interest	$ 7.1	$ 7.1

The cash outflow for interest paid, classified as financing activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 31
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_31&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_InterestPaidClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration