根据第13和15(d)条提交的年度报告

累计其他综合收益（亏损）明细累计其他综合收益（亏损）成分明细（明细）

v2.4.1.9
累计其他综合收益（亏损）明细累计其他综合收益（亏损）构成（明细）（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
累计其他综合收益（亏损）分项详情〔细目〕      
衍生工具，（收益）损失从累积的OCI重新分类为收益，有效部分，净额 (31.0美元)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet (22.1美元)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet 18.1美元us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
当期累计其他综合收益（损失）重分类的总额 33.3clf_TotalAmountReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDuringPeriod 53.6clf_TotalAmountReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDuringPeriod  
累积设定受益计划调整〔成员〕      
累计其他综合收益（亏损）分项详情〔细目〕      
先前服务（成本）贷记的摊销 0.9us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		［1］ 0.6us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		［1］  
固定收益计划，收益（损失）摊销 19.1us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		［1］ 41.4us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		［1］  
固定收益计划，削减 (5.0)us-gaap_DefinedBenefitPlanCurtailments
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		0us-gaap_DefinedBenefitPlanCurtailments
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		 
固定收益计划，特殊终止福利 3.4us-gaap_DefinedBenefitPlanSpecialTerminationBenefits
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		0us-gaap_DefinedBenefitPlanSpecialTerminationBenefits
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		 
其他综合收益（损失），重新分类，养老金和其他退休后福利计划，净收益（损失）确认为净定期收益成本，税前 16.6us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		40.8us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		 
其他综合收益（损失），养老金和其他退休后福利计划，期间产生的未摊销净收益（损失），税收 (5.8)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		(14.3)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		 
从累计其他综合收益（损失）中重新分类的金额 10.8us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		26.5us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		 
有价证券未实现利得（亏损）[成员][成员]      
累计其他综合收益（亏损）分项详情〔细目〕      
有价证券，未实现收益（损失） (11.4)us-gaap_MarketableSecuritiesUnrealizedGainLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesMemberMember 		(0.2)us-gaap_MarketableSecuritiesUnrealizedGainLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesMemberMember 		 
累积非暂时性减值[成员]      
累计其他综合收益（亏损）分项详情〔细目〕      
除临时减值损失外，投资，其他综合损失部分，税前，包括归属于非控制性权益的部分，可供出售证券 (0.5)us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember 		5.3us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedOtherThanTemporaryImpairmentMember 		 
有价证券的未实现利得（亏损）及暂时性减值除外[成员][成员]      
累计其他综合收益（亏损）分项详情〔细目〕      
税前期间证券产生的其他综合收益（亏损）、未实现持有收益（亏损） (11.9)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesandOtherthanTemporaryImpairmentMember 		5.1us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesandOtherthanTemporaryImpairmentMember 		 
其他综合收益（损失），期间产生的未实现持有证券收益（损失），税费 3.4us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesandOtherthanTemporaryImpairmentMember 		(0.1)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesandOtherthanTemporaryImpairmentMember 		 
其他综合收益（损失），期间产生的未实现持有证券收益（损失），税后净额 (8.5)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesandOtherthanTemporaryImpairmentMember 		5.0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossonMarketableSecuritiesandOtherthanTemporaryImpairmentMember 		 
衍生品未实现利得亏损[成员]      
累计其他综合收益（亏损）分项详情〔细目〕      
税前期间产生的其他综合收益（损失）、衍生品未实现收益（损失） 45.6us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		32.3us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		 
其他综合收益（损失）、期间产生的衍生品未实现收益（损失）、税费 (14.6)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		(10.2)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		 
衍生金融工具未实现净利得（亏损），扣除税后 31.0us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		22.1us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		 
衍生品未实现利得亏损[成员]|澳洲对冲合约[成员]      
累计其他综合收益（亏损）分项详情〔细目〕      
衍生工具，（收益）损失从累积的OCI重新分类为收益，有效部分，净额 18.9us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= clf_AustralianHedgeContractsMember
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		17.0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= clf_AustralianHedgeContractsMember
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		 
衍生品未实现利得亏损[成员]|加拿大对冲合约[成员]      
累计其他综合收益（亏损）分项详情〔细目〕      
衍生工具，（收益）损失从累积的OCI重新分类为收益，有效部分，净额 26.7美元us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= clf_CanadianHedgeContractsMember
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		15.3美元us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= clf_CanadianHedgeContractsMember
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= clf_UnrealizedGainLossOnDerivativesMember 		 
［1］ 这些累积的其他综合收益部分包括在截至2014年12月31日和2013年12月31日的年度确认的净定期福利成本中。更多信息见注7 -养老金和其他退休后福利。