iso4217:USD 0001710366 2025-01-01 2025-12-31 0001710366 cnr:HighCVThermalPACoalUndergroundMiningMember 2025-01-01 2025-12-31 0001710366 cnr:HighCVThermalCOCoalUndergroundMiningMember 2025-01-01 2025-12-31 0001710366 cnr:MetallurgicalWVCoalUndergroundMiningMember 2025-01-01 2025-12-31 0001710366 cnr:PowderRiverBasinWYCoalOpenPitMember 2025-01-01 2025-12-31 0001710366 country:US cnr:U.S.FederalGovernmentMember 2025-01-01 2025-12-31 0001710366 1 2025-01-01 2025-12-31 0001710366 2 2025-01-01 2025-12-31 0001710366 3 2025-01-01 2025-12-31 0001710366 4 2025-01-01 2025-12-31 0001710366 5 2025-01-01 2025-12-31 0001710366 6 2025-01-01 2025-12-31 0001710366 7 2025-01-01 2025-12-31 0001710366 8 2025-01-01 2025-12-31 0001710366 9 2025-01-01 2025-12-31 0001710366 10 2025-01-01 2025-12-31 0001710366 11 2025-01-01 2025-12-31 0001710366 12 2025-01-01 2025-12-31 0001710366 13 2025-01-01 2025-12-31 0001710366 14 2025-01-01 2025-12-31 0001710366 15 2025-01-01 2025-12-31 0001710366 16 2025-01-01 2025-12-31 0001710366 17 2025-01-01 2025-12-31 0001710366 18 2025-01-01 2025-12-31 0001710366 19 2025-01-01 2025-12-31 0001710366 20 2025-01-01 2025-12-31 0001710366 21 2025-01-01 2025-12-31 0001710366 22 2025-01-01 2025-12-31 0001710366 23 2025-01-01 2025-12-31 0001710366 24 2025-01-01 2025-12-31 2.01 SD false 0001710366 Core Natural Resources, Inc. 2025-12-31 USD NR 132662000 42987000 69495000 15919000 4261000 12726000 2815000 226000 15767000 2274000 8033000 374000 10681000 581000 1531000 95000 2207000 25443000 61462000 11199000 98104000 42987000 69495000 15919000 4261000 132662000 12726000 rxp:Taxes country:US snj:US-PA cnr:U.S.FederalGovernmentMember cnr:HighCVThermalPACoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:HighCVThermalMember 2815000 rxp:Fees country:US snj:US-PA cnr:U.S.FederalGovernmentMember cnr:HighCVThermalPACoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:HighCVThermalMember 226000 rxp:CommunityAndSocial country:US snj:US-PA cnr:U.S.FederalGovernmentMember cnr:HighCVThermalPACoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:HighCVThermalMember 8033000 rxp:Royalties country:US snj:US-CO cnr:U.S.FederalGovernmentMember cnr:HighCVThermalCOCoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:HighCVThermalMember 2274000 rxp:Taxes country:US snj:US-CO cnr:U.S.FederalGovernmentMember cnr:HighCVThermalCOCoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:HighCVThermalMember 374000 rxp:Fees country:US snj:US-CO cnr:U.S.FederalGovernmentMember cnr:HighCVThermalCOCoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:HighCVThermalMember 581000 rxp:Taxes country:US snj:US-WV cnr:U.S.FederalGovernmentMember cnr:MetallurgicalWVCoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:MetallurgicalMember 1531000 rxp:Fees country:US snj:US-WV cnr:U.S.FederalGovernmentMember cnr:MetallurgicalWVCoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:MetallurgicalMember 95000 rxp:CommunityAndSocial country:US snj:US-WV cnr:U.S.FederalGovernmentMember cnr:MetallurgicalWVCoalUndergroundMiningMember cnr:CoalMember Underground Mining cnr:MetallurgicalMember 61462000 rxp:Royalties country:US snj:US-WY cnr:U.S.FederalGovernmentMember cnr:PowderRiverBasinWYCoalOpenPitMember cnr:CoalMember Open Pit cnr:PowderRiverBasinMember 25443000 rxp:Taxes country:US snj:US-WY cnr:U.S.FederalGovernmentMember cnr:PowderRiverBasinWYCoalOpenPitMember cnr:CoalMember Open Pit cnr:PowderRiverBasinMember 11199000 rxp:Fees country:US snj:US-WY cnr:U.S.FederalGovernmentMember cnr:PowderRiverBasinWYCoalOpenPitMember cnr:OtherMember Open Pit cnr:PowderRiverBasinMember 934000 rxp:Taxes country:US cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 450000 rxp:Taxes country:US cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 311000 rxp:Taxes country:US cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 268000 rxp:Taxes country:US cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 1393000 rxp:CommunityAndSocial country:US snj:US-KY cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 1102000 rxp:CommunityAndSocial country:US snj:US-WV cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 754000 rxp:CommunityAndSocial country:US snj:US-VA cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 337000 rxp:CommunityAndSocial country:US snj:US-OH cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 137000 rxp:CommunityAndSocial country:US snj:US-UT cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 132000 rxp:CommunityAndSocial country:US snj:US-PA cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 71000 rxp:CommunityAndSocial country:US snj:US-IL cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember 14000 rxp:CommunityAndSocial country:US snj:US-TN cnr:U.S.FederalGovernmentMember cnr:OtherMember Underground Mining cnr:CorporateAndOtherMember