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REVENUE: - Receivables by reporting segment (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($) T	Dec. 31, 2021 USD ($)
Opening and closing balances of receivables
Trade receivables	$ 1,065.8	$ 1,358.7
Related parties, current	48.1	49.1
Corporate, other and eliminations
Opening and closing balances of receivables
Related parties, current	$ 2.1	2.0
Copper concentrates
Long Term Contracts
Long term contracts | T	110,000
Copper cathodes
Long Term Contracts
Long term contracts | T	48,000
Molybdenum concentrates
Long Term Contracts
Long term contracts | T	36,558
Sulfuric acid
Long Term Contracts
Long term contracts | T	342,058
Mexican Open-Pit | Operating segment
Opening and closing balances of receivables
Trade receivables	$ 532.0	656.0
Related parties, current	45.1	46.9
Mexican IMMSA Unit | Operating segment
Opening and closing balances of receivables
Trade receivables	60.3	51.2
Related parties, current	0.1	0.2
Peruvian Operations | Operating segment
Opening and closing balances of receivables
Trade receivables	473.5	$ 651.5
Related parties, current	$ 0.8

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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