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Management - Labor Relations (Details) | 12 Months Ended
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Dec. 31, 2024 numberOfEmployee
Concentration Risk [Line Items] |
Number of employees | 5,600
Number of hourly employees | 4,300
Hourly employees represented by organized labor unions (in percent) | 40.00%
Coal production generated by hourly employees represented by organized labor unions (in percent) | 21.00%
Represented by Organized Labor Union | Kayenta Mine |
Concentration Risk [Line Items] |
Number of employees | 30
Represented by Organized Labor Union | Shoal Creek |
Concentration Risk [Line Items] |
Number of employees | 310
Represented by Organized Labor Union | Wilpinjong Mine |
Concentration Risk [Line Items] |
Number of employees | 460
Represented by Organized Labor Union | Coppabella Mine |
Concentration Risk [Line Items] |
Number of employees | 330
Represented by Organized Labor Union | Moorvale Mine |
Concentration Risk [Line Items] |
Number of employees | 165
Represented by Organized Labor Union | Centurion Mine |
Concentration Risk [Line Items] |
Number of employees | 130
Represented by Organized Labor Union | Metropolitan Underground Mine |
Concentration Risk [Line Items] |
Number of employees | 165
Represented by Organized Labor Union | Metropolitan Prep Plant |
Concentration Risk [Line Items] |
Number of employees | 15
Represented by Organized Labor Union | Wambo Underground Mine |
Concentration Risk [Line Items] |
Number of employees | 90
Represented by Organized Labor Union | Wambo Prep Plant |
Concentration Risk [Line Items] |
Number of employees | 20

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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/2003/role/disclosureRef -Topic 954 -SubTopic 310 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478785/954-310-50-2 + Details
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