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INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES) - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
royalty
Dec. 31, 2020
USD ($)
Disclosure of detailed information about borrowings [line items]    
Number of royalties | royalty 35  
Sale of royalties, cash consideration $ 46.2  
Sale of royalties, transaction costs 0.3  
Gain on sale of royalties 45.9 $ 0.0
Insurance recovery 10.2  
Percent of assets and liabilities derecognized   30.00%
Gain on establishment of the Rosebel UJV3 $ 0.0 $ 16.9
Rosebel UJV    
Disclosure of detailed information about borrowings [line items]    
Percent of assets and liabilities derecognized   30.00%
Gain on establishment of the Rosebel UJV3   $ 16.9