XML 115 R83.htm IDEA: XBRL DOCUMENT v3.22.4
Mineral Properties, Plant and Equipment - Rollforward of Carrying Value (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning $ 2,344,551 $ 2,415,006
Additions 300,617 266,474
Disposals (17,124) (18,292)
Depreciation, property, plant and equipment (321,154) (304,293)
Depreciation charge captured in inventory (19,470) (21,249)
(Impairment charges) reversals (99,064) 0
Transfers 0 0
Closure and decommissioning – changes in estimate (Note 16) 37,998 6,905
Carrying value, ending 2,226,354 2,344,551
Cost 5,863,678 5,612,118
Depreciation and amortization included in mine care and maintenance (5,100) (1,300)
Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning (3,267,567)  
Carrying value, ending (3,637,324) (3,267,567)
Other property, plant and equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning 474,727 679,531
Additions 20,470 16,766
Disposals (5,785) (4,542)
Depreciation, property, plant and equipment (113,383) (136,072)
Depreciation charge captured in inventory 0 0
(Impairment charges) reversals (24,863)  
Transfers 41,817 (80,956)
Closure and decommissioning – changes in estimate (Note 16) 0 0
Carrying value, ending 392,983 474,727
Cost 1,281,366 1,288,392
Other property, plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning (813,665)  
Carrying value, ending (888,383) (813,665)
Depletable, Reserves and Resources [member] | Mining property [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning 1,115,905 996,745
Additions 237,339 210,484
Disposals (11,339) (1,435)
Depreciation, property, plant and equipment (201,277) (166,116)
Depreciation charge captured in inventory (19,470) (21,249)
(Impairment charges) reversals (73,723)  
Transfers (122,720) 90,571
Closure and decommissioning – changes in estimate (Note 16) 37,998 6,905
Carrying value, ending 962,713 1,115,905
Cost 3,123,604 3,140,594
Depletable, Reserves and Resources [member] | Mining property [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning (2,024,689)  
Carrying value, ending (2,160,891) (2,024,689)
Non-depletable, Reserves and Resources [member] | Mining property [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning 327,424 307,080
Additions 42,808 31,971
Disposals 0 0
Depreciation, property, plant and equipment (6,494) (2,105)
Depreciation charge captured in inventory 0 0
(Impairment charges) reversals (478)  
Transfers 78,860 (9,522)
Closure and decommissioning – changes in estimate (Note 16) 0 0
Carrying value, ending 442,120 327,424
Cost 617,364 343,705
Non-depletable, Reserves and Resources [member] | Mining property [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning (16,281)  
Carrying value, ending (175,244) (16,281)
Non-depletable, Exploration and Evaluation [member] | Mining property [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning 426,495 431,650
Additions 0 7,253
Disposals 0 (12,315)
Depreciation, property, plant and equipment 0 0
Depreciation charge captured in inventory 0 0
(Impairment charges) reversals 0  
Transfers 2,043 (93)
Closure and decommissioning – changes in estimate (Note 16) 0 0
Carrying value, ending 428,538 426,495
Cost 841,344 839,427
Non-depletable, Exploration and Evaluation [member] | Mining property [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Carrying value, beginning (412,932)  
Carrying value, ending $ (412,806) $ (412,932)