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REVENUE: - Receivables by reporting segment (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) T	Dec. 31, 2023 USD ($)
Opening and closing balances of receivables
Trade receivables	$ 1,622.3	$ 1,141.1
Related parties, current	16.9	27.3
Corporate, other and eliminations
Opening and closing balances of receivables
Related parties, current	$ (52.8)	(0.1)
Copper concentrates
Long Term Contracts
Long term contracts | T	177,500
Copper cathodes
Long Term Contracts
Long term contracts | T	48,000
Molybdenum concentrates
Long Term Contracts
Long term contracts | T	23,543
Sulfuric acid
Long Term Contracts
Long term contracts | T	271,628
Mexican Open-Pit | Operating segment
Opening and closing balances of receivables
Trade receivables	$ 913.6	556.3
Related parties, current	43.8	25.7
Mexican IMMSA Unit | Operating segment
Opening and closing balances of receivables
Trade receivables	71.0	49.1
Related parties, current	25.6	0.9
Peruvian Operations | Operating segment
Opening and closing balances of receivables
Trade receivables	637.7	535.7
Related parties, current	$ 0.3	$ 0.8

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: 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

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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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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

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