CASH FLOW ITEMS - Changes in Non-Cash Working Capital Items and Non-Current Ore Stockpiles (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Cash Flow Statement [Abstract]
Receivables and other current assets	$ 18.0	$ (36.9)
Inventories and non-current ore stockpiles	(76.6)	(32.6)
Accounts payable and accrued liabilities	43.7	28.9
Movements in non-cash working capital items and non-current ore stockpiles	$ (14.9)	$ (40.6)

The increase (decrease) in working capital.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2023-01-01
-Paragraph 20
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_20&doctype=Standard
-URIDate 2023-03-23

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