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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Revenue    
Metal sales $ 3,455.1 $ 2,599.6
Cost of sales    
Production cost of sales 1,805.7 1,218.3
Depreciation, depletion and amortization 784.0 695.7
Impairment charges and asset derecognition 350.0 144.5
Total cost of sales 2,939.7 2,058.5
Gross profit 515.4 541.1
Other operating expense 113.8 266.4
Exploration and business development 154.1 88.2
General and administrative 129.8 114.4
Operating earnings 117.7 72.1
Other income - net 64.4 83.6
Finance income 18.3 10.8
Finance expense (93.7) (82.2)
Earnings from continuing operations before tax 106.7 84.3
Income tax expense - net (76.1) (115.0)
Earnings (loss) from continuing operations after tax 30.6 (30.7)
(Loss) earnings from discontinued operations after tax (636.3) 249.4
Net (loss) earnings (605.7) 218.7
Net earnings (loss) from continuing operations attributable to:    
Non-controlling interests (1.3) (0.8)
Common shareholders 31.9 (29.9)
Net (loss) earnings from discontinued operations attributable to:    
Non-controlling interests 0.8 (1.7)
Common shareholders (637.1) 251.1
Net (loss) earnings attributable to:    
Non-controlling interests (0.5) (2.5)
Common shareholders $ (605.2) $ 221.2
Earnings (loss) per share from continuing operations attributable to common shareholders    
Basic $ 0.02 $ (0.02)
Diluted 0.02 (0.02)
(Loss) earnings per share from discontinued operations attributable to common shareholders    
Basic (0.50) 0.20
Diluted (0.50) 0.20
(Loss) earnings per share attributable to common shareholders    
Basic (0.47) 0.18
Diluted $ (0.47) $ 0.17