根据第13和15(d)条提交的年度报告

清单（叙述）（详情）

v2.4.1.9
存货（记叙）（详情）（美元）
除非另有说明，单位为百万
12个月结束
2014年12月31日
2013年12月31日
2012年12月31日
皇冠体育官网铁矿石[成员]      
存货〔分项目录〕      
库存，后进先出储备 119.0美元us-gaap_InventoryLIFOReserve
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		115.3美元us-gaap_InventoryLIFOReserve
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		 
后进先出存货清算对收益的影响 44.8us-gaap_EffectOfLIFOInventoryLiquidationOnIncome
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		   
由于后进先出层的建立，库存增加   7.4clf_IncreaseInInventoriesDueToBuildUpOfLifoLayers
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		 
销售成本[成员]|加拿大东部铁矿石[成员]      
存货〔分项目录〕      
存货减记 38.9us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_EasternCanadianIronOreMember 		  0us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_EasternCanadianIronOreMember
销售成本[成员]|北美煤炭[成员]      
存货〔分项目录〕      
存货减记 44.5us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_NorthAmericanCoalMember 		11.1us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_NorthAmericanCoalMember 		24.4us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_NorthAmericanCoalMember
在制品库存[成员]| Bloom Lake[成员]|销售成本[成员]      
存货〔分项目录〕      
存货减记 0us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_WorkinprocessinventoryMember
/ clf_ReportingUnitAxis
= clf_BloomLakeMember 		   
在制品库存[成员]| Wabush[成员]|销售成本[成员]      
存货〔分项目录〕      
存货减记 0us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_WorkinprocessinventoryMember
/ clf_ReportingUnitAxis
= clf_WabushMember 		   
成品库存[成员]| Bloom Lake[成员]|销售成本[成员]      
存货〔分项目录〕      
存货减记 0us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_FinishedgoodsinventoryMember
/ clf_ReportingUnitAxis
= clf_BloomLakeMember 		   
成品库存【会员】|沃布什【会员】|销售成本【会员】      
存货〔分项目录〕      
存货减记 0us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_FinishedgoodsinventoryMember
/ clf_ReportingUnitAxis
= clf_WabushMember 		   
球团[成员]|销售成本[成员]|加拿大东部铁矿石[成员]      
存货〔分项目录〕      
存货减记   11.1us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_PelletsMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_EasternCanadianIronOreMember 		 
颗粒[会员]|沃布什[会员]|销售成本[会员]      
存货〔分项目录〕      
滞销存货减值费用   10.6clf_UnsaleableInventoryImpairmentCharge
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_PelletsMember
/ clf_ReportingUnitAxis
= clf_WabushMember 		 
精矿[成员]|销售成本[成员]|加拿大东部铁矿石[成员]      
存货〔分项目录〕      
存货减记   13.2us-gaap_InventoryWriteDown
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_ConcentrateMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_EasternCanadianIronOreMember 		 
集中[会员]|沃布什[会员]|销售成本[会员]      
存货〔分项目录〕      
滞销存货减值费用   7.9美元clf_UnsaleableInventoryImpairmentCharge
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
/ us-gaap_PublicUtilitiesInventoryAxis
= clf_ConcentrateMember
/ clf_ReportingUnitAxis
= clf_WabushMember