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v3.25.1

REVENUE FROM CONTRACTS WITH CUSTOMERS - Supply contracts (Details) $ in Thousands | Mar. 31, 2025 USD ($)
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Performance obligations unsatisfied or partially unsatisfied |
Total | $ 3,322,372
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 1,322,827
Expected timing of satisfaction period | 9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 848,328
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 | $ 498,148
Expected timing of satisfaction period | 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 653,069
Expected timing of satisfaction period | 1 year
Illinois Basin Coal |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 2,650,766
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 811,427
Expected timing of satisfaction period | 9 months
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 718,227
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 | $ 468,043
Expected timing of satisfaction period | 1 year
Illinois Basin Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 653,069
Expected timing of satisfaction period | 1 year
Appalachia Coal |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 671,606
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 511,400
Expected timing of satisfaction period | 9 months
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Total | $ 130,101
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
Appalachia Coal | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 |
Performance obligations unsatisfied or partially unsatisfied |
Expected timing of satisfaction period | 1 year

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