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RELATED PARTY TRANSACTIONS: (Details) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($) | Dec. 31, 2012 item MW | Dec. 31, 2014 item
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | $ 33.3 | $ 49.1 |  |  |
Related parties payable: |  |  | 120.2 | 103.3 |  |  |
Total purchases |  |  | 534.6 | 454.4 | $ 576.3 |  |
Total sales |  |  | $ 2.1 | 2.0 | 1.9 |  |
Equity investment in affiliate |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Ownership percentage |  |  | 44.20% |  |  |  |
Apu Coropuna S.R.L. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Ownership percentage |  |  | 30.00% |  |  |  |
Minimum |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Aggregate consideration of Material Affiliate Transaction to be be authorized by the General Counsel and CFO |  |  | $ 8.0 |  |  |  |
Maximum |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Aggregate consideration of Material Affiliate Transaction to be be authorized by the General Counsel and CFO |  |  | 10.0 |  |  |  |
Grupo Mexico and affiliates |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Total purchases |  |  | 2.7 | 2.5 | 4.1 |  |
Total sales |  |  | 213.0 | 160.5 | 132.9 |  |
Asarco LLC ("Asarco") |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | 9.2 | 10.0 |  |  |
Related parties payable: |  |  | 23.8 | 14.9 |  |  |
Total purchases |  |  | 66.3 | 31.3 | 233.9 |  |
Total sales |  |  | 48.0 | 33.4 | 77.9 |  |
Accounts Receivable |  | $ 62.0 |  |  |  |  |
Making quarterly payments |  | $ 0.5 |  |  |  |  |
Asarco LLC ("Asarco") | Other Noncurrent Assets [Member] |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable |  |  |  |  | 2.2 |  |
Asarco LLC ("Asarco") | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 2.00% |  |  |  |  |
Americas Mining Corporation |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  |  | 0.1 |  |  |
Total sales |  |  |  | 0.1 |  |  |
AMMINCO Apoyo Administrativo, S.A. de C.V. ("AMMINCO") |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties payable: |  |  | 5.0 | 9.5 |  |  |
Total purchases |  |  | 10.0 | 8.9 | 18.6 |  |
Total sales |  |  |  | 0.1 | 0.1 |  |
AMMINCO Apoyo Administrativo, S.A. de C.V. ("AMMINCO") | Maximum |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  |  | 0.1 |  |  |
Compania Perforadora Mexico S.A.P.I. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | 0.3 | 0.3 |  |  |
Eolica El Retiro, S.A.P.I. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties payable: |  |  | 0.4 | 2.7 |  |  |
Total purchases |  |  | $ 3.0 | $ 9.3 | 1.0 |  |
Number of wind turbines | item |  |  |  |  |  |  | 37
Percentage of supply to third-party energy users |  |  | 27.00% | 61.00% |  |  |
Ferrocarril Mexicano, S.A. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties payable: |  |  | $ 5.6 | $ 4.0 |  |  |
Total purchases |  |  | 42.9 | 41.8 | 45.8 |  |
Grupo Mexico |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Total purchases |  |  |  |  | 10.0 |  |
Donations |  |  | 3.5 | 0.9 | 7.1 |  |
Grupo Mexico Servicios |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties payable: |  |  | 20.2 | 11.1 |  |  |
Total purchases |  |  | 20.1 | 20.1 |  |  |
Intermodal Mexico S.A. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Total purchases |  |  |  | 0.5 |  |  |
MGE |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | 23.4 | 38.4 |  |  |
Related parties payable: |  |  | 57.5 | 57.2 |  |  |
Total purchases |  |  | 331.0 | 287.3 | 213.3 |  |
Total sales |  |  | $ 165.0 | $ 126.9 | 54.9 |  |
Accounts Receivable | $ 97.2 |  |  |  |  |  |
Making quarterly payments | $ 5.1 |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 8.28% |  |  |  |  |  |
MGE | Mexico |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Number of natural gas-fired combined cycle power generating units | item |  |  |  |  |  | 2 |
Net total capacity (in megawatts) | MW |  |  |  |  |  | 516.2 |
Percentage of supply to third-party energy users |  |  | 1.40% | 2.00% |  |  |
Mexico Compania Constructora S.A de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties payable: |  |  | $ 5.9 | $ 2.0 |  |  |
Total purchases |  |  | 43.8 | 44.5 | 42.6 |  |
Peru Mining Exploration And Development Company |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Total purchases |  |  |  | $ 0.4 |  |  |
Number of mining concessions purchased | item |  |  |  | 3 |  |  |
Grupo Mexico Servicios de Ingenieria, S.A. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | 0.2 | $ 0.2 |  |  |
Related parties payable: |  |  | 1.2 | 0.9 |  |  |
Total purchases |  |  | 16.7 | 10.3 | 11.1 |  |
Controladora de Infraestructura Energetica Mexico, S. A. de C. V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Total purchases |  |  | 0.8 |  |  |  |
Boutique Bowling de Mexico, S.A. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | 0.1 | 0.1 |  |  |
Related parties payable: |  |  | 0.3 | 0.3 |  |  |
Total purchases |  |  | 0.4 | 0.3 | 0.4 |  |
Total sales |  |  | 0.1 | 0.1 | 0.1 |  |
Mexico Transportes Aereos S.A. de C.V. ("Mextransport") |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties payable: |  |  | 0.1 | 0.5 |  |  |
Total purchases |  |  | 2.1 | 1.8 | 3.5 |  |
Total sales |  |  | 1.9 | 1.8 | 1.7 |  |
Operadora de Cinemas S.A. de C.V. |  |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |  |
Related parties receivable current: |  |  | 0.1 |  |  |  |
Related parties payable: |  |  | 0.2 | 0.2 |  |  |
Total purchases |  |  | 0.2 | 0.4 | 0.2 |  |
Total sales |  |  | $ 0.1 | $ 0.1 | $ 0.1 |  |

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