REVENUE: - Receivables by reporting segment (Details) $ in Millions	9 Months Ended
Sep. 30, 2024 USD ($) T	Dec. 31, 2023 USD ($)
Opening and closing balances of receivables
Trade receivables	$ 1,530.2	$ 1,141.1
Related parties, current	12.3	27.3
Corporate, other and eliminations
Opening and closing balances of receivables
Related parties, current	$ (29.5)	(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	21,315
Sulfuric acid
Long Term Contracts
Long term contracts \| T	251,143
Mexican Open-Pit \| Operating segment
Opening and closing balances of receivables
Trade receivables	$ 874.7	556.3
Related parties, current	26.2	25.7
Mexican IMMSA Unit \| Operating segment
Opening and closing balances of receivables
Trade receivables	78.6	49.1
Related parties, current	15.2	0.9
Peruvian Operations \| Operating segment
Opening and closing balances of receivables
Trade receivables	577.0	535.7
Related parties, current	$ 0.4	$ 0.8

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Represents the quantity of product agreed to be supplied over a specified time period under the long-term sales contract.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ 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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Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

+ References

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