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Management - Labor Relations | 12 Months Ended
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Dec. 31, 2025
Risks and Uncertainties [Abstract] |
Management - Labor Relations | Management — Labor Relations On December 31, 2025, the Company had approximately 5,400 employees worldwide, including approximately 4,200 hourly employees; the employee amounts exclude employees that were employed at operations classified as discontinued operations. Approximately 39% of those hourly employees were represented by organized labor unions and were employed by mines that generated 18% of the Company’s 2025 coal production from continuing operations. In the U.S., the hourly employees of one active mine and one inactive mine are represented by an organized labor union. In Australia, the coal mining industry is unionized and the majority of hourly workers employed at the Company’s Australian mining operations are members of trade unions. The Mining and Energy Union (MEU) generally represents the Company’s Australian subsidiaries’ hourly production and engineering employees, including those employed through contract mining relationships. The following table presents the Company’s active and inactive mining operations as of December 31, 2025 in which the employees are represented by organized labor unions:
Mine |  | Approximate Number of Active Employees Represented |  | Union |  | Current Agreement Expiration Date or Date Amendable
U.S. |  |  |  |  |  |
Kayenta |  | 30 |  | UMWA |  | November 2029
Shoal Creek |  | 290 |  | UMWA |  | June 2029
Australia |  |  |  |  |  |
Wilpinjong |  | 425 |  | MEU |  | May 2028
Coppabella (1) |  | 305 |  | MEU |  | December 2025
Moorvale |  | 125 |  | MEU |  | May 2028
Centurion |  | 240 |  | N/A |  | January 2028
CMJV |  |  |  |  |  |
Handling and preparation plant employees |  | 10 |  | MEU |  | April 2027
Metropolitan |  |  |  |  |  |
Underground employees - Production |  | 190 |  | MEU |  | July 2028
Underground employees - Deputies |  | 15 |  | MEU |  | July 2026
Handling and preparation plant employees |  | 20 |  | MEU |  | January 2027
Wambo |  |  |  |  |  |
Handling and preparation plant employees (1) |  | 20 |  | MEU |  | August 2025
(1) The Company is currently negotiating a new labor agreement with the MEU and employees.

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