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REVENUE: - Receivables by reporting segment (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($) T	Dec. 31, 2022 USD ($)
Opening and closing balances of receivables
Trade receivables	$ 1,131.0	$ 1,394.1
Related parties, current	24.6	33.3
Corporate, other and eliminations
Opening and closing balances of receivables
Related parties, current	$ (4.2)	2.0
Copper concentrates
Long Term Contracts
Long term contracts | T	145,000
Copper cathodes
Long Term Contracts
Long term contracts | T	48,000
Molybdenum concentrates
Long Term Contracts
Long term contracts | T	19,290
Sulfuric acid
Long Term Contracts
Long term contracts | T	413,672
Mexican Open-Pit | Operating segment
Opening and closing balances of receivables
Trade receivables	$ 684.3	788.1
Related parties, current	24.2	31.1
Mexican IMMSA Unit | Operating segment
Opening and closing balances of receivables
Trade receivables	49.0	60.0
Related parties, current	4.1	0.1
Peruvian Operations | Operating segment
Opening and closing balances of receivables
Trade receivables	397.7	546.0
Related parties, current	$ 0.5	$ 0.1

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- References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-9

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- Definition

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