iso4217:USD 0001704715 2025-01-01 2025-12-31 0001704715 amr:MetMember amr:CUOUSVAMember 2025-01-01 2025-12-31 0001704715 amr:MetMember amr:CUOUSWVMember 2025-01-01 2025-12-31 0001704715 country:US amr:UnitedStatesDepartmentOfTheTreasuryMember 2025-01-01 2025-12-31 0001704715 country:US amr:OfficeOfSurfaceMiningReclamationAndEnforcementMember 2025-01-01 2025-12-31 0001704715 country:US amr:PensionBenefitGuaranteeCorporationMember 2025-01-01 2025-12-31 0001704715 country:US amr:InternalRevenueServiceMember 2025-01-01 2025-12-31 0001704715 country:CH amr:CasaCantonaleAVSMember 2025-01-01 2025-12-31 0001704715 1 2025-01-01 2025-12-31 0001704715 2 2025-01-01 2025-12-31 0001704715 3 2025-01-01 2025-12-31 0001704715 4 2025-01-01 2025-12-31 0001704715 5 2025-01-01 2025-12-31 0001704715 6 2025-01-01 2025-12-31 0001704715 7 2025-01-01 2025-12-31 0001704715 8 2025-01-01 2025-12-31 0001704715 9 2025-01-01 2025-12-31 0001704715 10 2025-01-01 2025-12-31 2.01 SD false 0001704715 Alpha Metallurgical Resources, Inc. 2025-12-31 USD NR 630155 6216221 6846376 3112181 24576936 27689117 3742336 0 3742336 1863231 1863231 6328266 6328266 31890681 31890681 169967 169967 3742336 40252145 43994481 0 rxp:Taxes country:US amr:UnitedStatesDepartmentOfTheTreasuryMember 6328266 rxp:CommunityAndSocial country:US amr:PensionBenefitGuaranteeCorporationMember 2960755 rxp:CommunityAndSocial country:US amr:InternalRevenueServiceMember 169967 rxp:CommunityAndSocial country:CH amr:CasaCantonaleAVSMember 630155 rxp:Taxes country:US amr:UnitedStatesDepartmentOfTheTreasuryMember amr:CUOUSVAMember amr:CoalMember amr:MetSegmentMember 348812 rxp:CommunityAndSocial country:US amr:OfficeOfSurfaceMiningReclamationAndEnforcementMember amr:CUOUSVAMember amr:CoalMember amr:MetSegmentMember 5867409 rxp:CommunityAndSocial country:US amr:InternalRevenueServiceMember amr:CUOUSVAMember amr:CoalMember amr:MetSegmentMember 3112181 rxp:Taxes country:US amr:UnitedStatesDepartmentOfTheTreasuryMember amr:CUOUSWVMember amr:CoalMember amr:MetSegmentMember 1514419 rxp:CommunityAndSocial country:US amr:OfficeOfSurfaceMiningReclamationAndEnforcementMember amr:CUOUSWVMember amr:CoalMember amr:MetSegmentMember 23062517 rxp:CommunityAndSocial country:US amr:InternalRevenueServiceMember amr:CUOUSWVMember amr:CoalMember amr:MetSegmentMember Payments include United States federal black lung excise taxes. Payments include United States federal employer related payroll taxes, reclamation fees, and pension benefit guarantee corporation fees.