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ASSETS AND LIABILITIES HELD FOR SALE - Disposal of senegal assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Apr. 25, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of analysis of single amount of discontinued operations [line items]        
Cash and cash equivalents   $ 367.1 $ 407.8 $ 544.9
Property, plant and equipment   3,496.5 2,598.0  
Other non-current assets   76.3 128.8  
Accounts payable and accrued liabilities   (317.6) (294.1)  
Non-controlling interests   58.1 76.0  
Assets   4,537.9 4,425.1  
Net earnings (loss) from discontinued operations   6.3 (16.4)  
Discontinued operations        
Disclosure of analysis of single amount of discontinued operations [line items]        
Assets   34.6 785.6  
Net earnings (loss) from discontinued operations   $ 6.3 $ (16.4)  
Senegal Assets | Discontinued operations        
Disclosure of analysis of single amount of discontinued operations [line items]        
Portion of consideration paid (received) consisting of cash and cash equivalents $ 165.6      
Portion of deferred consideration received consisting of cash and cash equivalents 32.0      
Transaction Costs Related To Disposal Of Subsidiaries (3.7)      
Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations 193.9      
Net earnings (loss) from discontinued operations 109.1      
Assets and liabilities classified as held for sale | Senegal Assets | Discontinued operations        
Disclosure of analysis of single amount of discontinued operations [line items]        
Cash and cash equivalents 1.4      
Property, plant and equipment 83.3      
Other non-current assets 1.1      
Accounts payable and accrued liabilities (0.6)      
Net carrying amount 85.2      
Non-controlling interests (0.4)      
Assets $ 84.8