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REVENUE FROM CONTRACTS WITH CUSTOMERS - Supply contracts (Details) $ in Thousands | Sep. 30, 2024 USD ($)
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Performance obligations unsatisfied or partially unsatisfied |
Total | $ 2,565,571
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 564,369
Expected timing of satisfaction period | 3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 1,100,572
Expected timing of satisfaction period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 515,425
Expected timing of satisfaction period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 385,205
Expected timing of satisfaction period | 1 year
Illinois Basin Coal |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 1,800,535
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 361,441
Expected timing of satisfaction period | 3 months
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 668,579
Expected timing of satisfaction period | 1 year
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 415,415
Expected timing of satisfaction period | 1 year
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 355,100
Expected timing of satisfaction period | 1 year
Appalachia Coal |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 765,036
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 202,928
Expected timing of satisfaction period | 3 months
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 431,993
Expected timing of satisfaction period | 1 year
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 100,010
Expected timing of satisfaction period | 1 year
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 30,105
Expected timing of satisfaction period | 1 year

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