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SEGMENT AND RELATED INFORMATION: - Receivables (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Financial information related to segments    
Trade receivables $ 1,394.1 $ 1,358.7
Related parties receivable current: 33.3 49.1
Corporate, other and eliminations    
Financial information related to segments    
Related parties receivable current: 2.0 2.0
Mexican Open-Pit    
Financial information related to segments    
Trade receivables 788.1 656.0
Related parties receivable current: 31.1 46.9
Mexican IMMSA Unit    
Financial information related to segments    
Trade receivables 60.0 51.2
Related parties receivable current: 0.1 0.2
Peruvian Operations    
Financial information related to segments    
Trade receivables 546.0 $ 651.5
Related parties receivable current: $ 0.1