根据第13和15(d)条提交的年度报告

物业、厂房及设备（各主要类别合并应折旧资产的价值）（详情）

v2.4.1.9
财产、厂房和设备（各主要类别合并可折旧资产的价值）（详情）（美元）
除非另有说明，单位为百万
2014年12月31日
2013年12月31日
2012年12月31日
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 2217 .7美元us-gaap_PropertyPlantAndEquipmentGross 13570美元。9us-gaap_PropertyPlantAndEquipmentGross  
累积折旧及损耗，物业，厂房及设备 802.8clf_AccumulatedDepreciationandDepletionPropertyPlantandEquipment 2,417.5clf_AccumulatedDepreciationandDepletionPropertyPlantandEquipment  
物业、厂房及设备、净 1,414.9us-gaap_PropertyPlantAndEquipmentNet 11,153.4us-gaap_PropertyPlantAndEquipmentNet 11,207.3us-gaap_PropertyPlantAndEquipmentNet
土地权及矿业权[成员]      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 590.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MiningPropertiesAndMineralRightsMember 		7,819.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MiningPropertiesAndMineralRightsMember 		 
办公室及资讯科技〔成员〕      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 75.5us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember 		125.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember 		 
建筑(成员)      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 65.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		255.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		 
采矿设备〔成员〕      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 732.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember 		1,819.3us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember 		 
加工设备〔成员〕      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 567.4us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OtherMachineryAndEquipmentMember 		2,148.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OtherMachineryAndEquipmentMember 		 
电力设施〔委员〕      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 48.8us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ElectricGenerationEquipmentMember 		114.3us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ElectricGenerationEquipmentMember 		 
土地改善〔成员〕      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 25.5us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember 		69.3us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember 		 
其他资产〔成员〕      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 60.8us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OtherAssetsMember 		227.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OtherAssetsMember 		 
工程进行中[委员]      
物业、厂房及设备〔分项〕      
物业、厂房及设备，总值 51.3美元us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember 		991.3美元us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember