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v3.25.1

RELATED PARTY TRANSACTIONS: (Details) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2020 MWh | Dec. 31, 2012 item MW | Dec. 31, 2024 USD ($) | Dec. 31, 2014 item
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | $ 15.0 |  |  |  | $ 13.5 |
Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 15.0 |  |  |  | 13.5 |
Other accrued liabilities | 65.6 |  |  |  | 49.2 |
Total purchases | 106.2 | $ 103.2 |  |  |  |
Total sales | $ 0.8 | 0.8 |  |  |  |
Affiliates | Equity investment in affiliate |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Ownership percentage | 44.20% |  |  |  |  |
Affiliates | Apu Coropuna S.R.L. |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Ownership percentage | 30.00% |  |  |  |  |
Affiliates | Minimum |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Aggregate consideration of Material Affiliate Transaction to be be authorized by the General Counsel and CFO | $ 8.0 |  |  |  |  |
Affiliates | Maximum |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Aggregate consideration of Material Affiliate Transaction to be be authorized by the General Counsel and CFO | 10.0 |  |  |  |  |
Related party receivable and payable | 0.1 |  |  |  | 0.1 |
Total sales | 0.1 | 0.1 |  |  |  |
Threshold revenue from related parties | 0.1 | 0.1 |  |  |  |
Grupo Mexico and affiliates | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Total sales | 31.4 | 22.3 |  |  |  |
Asarco LLC ("Asarco") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 8.2 |  |  |  | 7.1 |
Other accrued liabilities | 13.9 |  |  |  | 6.0 |
Total purchases | 7.8 | 1.2 |  |  |  |
Total sales | 13.0 | 6.7 |  |  |  |
AMMINCO Apoyo Administrativo, S.A. de C.V. ("AMMINCO") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | 8.8 |  |  |  | 6.0 |
Total purchases | 2.5 | 2.5 |  |  |  |
Eolica El Retiro, S.A.P.I. de C.V. |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Number of wind turbines | item |  |  |  |  |  | 37
Eolica El Retiro, S.A.P.I. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | 0.4 |  |  |  | 0.4 |
Total purchases | $ 0.4 | $ 0.1 |  |  |  |
Percentage of supply to third-party energy users | 33.30% | 3.40% |  |  |  |
Ferrocarril Mexicano, S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | $ 8.2 |  |  |  | 2.9 |
Total purchases | 5.5 | $ 8.1 |  |  |  |
Grupo Mexico | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Total purchases | 1.0 | 1.0 |  |  |  |
Donations | 0.0 | 0.6 |  |  |  |
Grupo Mexico Servicios | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | 6.9 |  |  |  | 4.3 |
Total purchases | 5.0 | 5.0 |  |  |  |
Mexico Generadora de Energia S. de R.L. ("MGE") | Mexico |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Number of natural gas-fired combined cycle power generating units | item |  |  |  | 2 |  |
Mexico Generadora de Energia S. de R.L. ("MGE") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 5.4 |  |  |  | 5.4 |
Other accrued liabilities | 16.7 |  |  |  | 15.9 |
Total purchases | 59.7 | 61.7 |  |  |  |
Total sales | $ 18.4 | $ 15.6 |  |  |  |
Mexico Generadora de Energia S. de R.L. ("MGE") | Affiliates | Mexico |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Net total capacity (in megawatts) | MW |  |  |  | 516.2 |  |
Percentage of supply to third-party energy users | 3.70% | 5.20% |  |  |  |
Mexico Compania Constructora S.A de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | $ 4.2 |  |  |  | 8.0 |
Total purchases | 14.2 | $ 20.6 |  |  |  |
Parque Eolico de Fenicias, S. de R.L. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | 4.4 |  |  |  | 2.6 |
Total purchases | $ 8.6 |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts per year) | MWh |  |  | 611,400 |  |  |
Term of power purchase agreement related to sale of power plant |  |  | 20 years |  |  |
Percentage of supply to third-party energy users | 74.80% |  |  |  |  |
Grupo Mexico Servicios de Ingenieria, S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | $ 0.8 |  |  |  | 2.1 |
Total purchases | 2.3 | 4.0 |  |  |  |
Boutique Bowling de Mexico, S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Other accrued liabilities | 0.6 |  |  |  | 0.5 |
Total purchases | 0.1 | 0.2 |  |  |  |
Empresarios Industriales de Mexico, S.A. de C.V | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 1.0 |  |  |  | 0.9 |
Total sales | 0.1 | 0.1 |  |  |  |
Mexico Transportes Aereos S.A. de C.V. ("Mextransport") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 0.4 |  |  |  |  |
Other accrued liabilities | 0.2 |  |  |  | 0.1 |
Total purchases | 0.8 | 0.7 |  |  |  |
Total sales | 0.7 | 0.6 |  |  |  |
Operadora de Cinemas S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 0.1 |  |  |  | 0.1 |
Other accrued liabilities | 0.5 |  |  |  | $ 0.4 |
Total purchases | $ 0.1 | $ 0.1 |  |  |  |

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