根据第13或15(d)条提交的季度报告

股东权益累计其他综合收益（亏损）（详情）

v2.4.1.9
股东权益累计其他综合收益（亏损）（明细）（美元）
除非另有说明，单位为百万
3个月结束
2015年3月31日
2014年3月31日
2014年12月31日
2013年12月31日
2013年3月31日
累计其他综合收益（损失），养老金和其他退休后福利计划，税后 (251.5美元)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax   (291.1美元)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (204.9美元)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (202.0美元)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
累计其他综合损失 (38.2)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax   (245.8)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (112.9)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (55.1)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
累计其他综合收益（损失），可供出售证券调整，税后 (0.2)us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax   (1.0)us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 6.2us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 10.1us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
累计其他综合收益（损失），外币折算调整，税后净额 232.4us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax   64.4us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax 106.7us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax 147.2us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
累计其他综合收益（损失），现金流套期保值产生的净收益（损失）累计变化，税后影响 (18.9)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax   (18.1)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax (20.9)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax (10.4)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
累计其他综合收益（损失）[成员]          
其他综合收益（亏损），未重新分类，税前 12.1us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember 		41.6us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember 		     
从累计其他综合收益（损失）中重新分类的金额 195.5clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember 		16.2clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember 		     
累积设定受益计划调整〔成员〕          
其他综合收益（亏损），未重新分类，税前 31.1us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		(0.4)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		     
累计未实现投资净收益（亏损）[成员]          
其他综合收益（亏损），未重新分类，税前 2.8us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember 		3.8us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember 		     
累计翻译调整数[成员]          
其他综合收益（亏损），未重新分类，税前 (14.7)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedTranslationAdjustmentMember 		40.5us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedTranslationAdjustmentMember 		     
指定或合资格现金流量套期累积净收益（亏损）[成员]          
其他综合收益（亏损），未重新分类，税前 (7.1)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 		(2.3)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
/ us-gaap_OtherComprehensiveIncomeLocationAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 		     
累积设定受益计划调整〔成员〕          
从累计其他综合收益（损失）中重新分类的金额 8.5clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		3.3clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember 		     
累计未实现投资净收益（亏损）[成员]          
从累计其他综合收益（损失）中重新分类的金额 (2.0)clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember 		0.1clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember 		     
累计翻译调整数[成员]          
从累计其他综合收益（损失）中重新分类的金额 182.7clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedTranslationAdjustmentMember 		0clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedTranslationAdjustmentMember 		     
指定或合资格现金流量套期累积净收益（亏损）[成员]          
从累计其他综合收益（损失）中重新分类的金额 6.3美元clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 		12.8美元clf_AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLoss
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember