根据第13和15(d)条提交的年度报告

所得税（有效税率对账表）（详情）

v2.4.1.9
所得税（有效税率对账表）（详情）
除非另有说明，单位为百万
3个月结束 12个月结束
2014年12月31日
美元($)
2014年12月31日
美元($)
2014年12月31日
2013年12月31日
美元($)
2013年12月31日
2012年12月31日
美元($)
2012年12月31日
所得税或有税〔分项〕              
按联邦法定所得税率调整的有效所得税率，金额   (3361美元。3)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate   171.3美元us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate   (175.6美元)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate  
有效所得税率调整，百分比   35.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 35.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
外币交易收益，税前   (4.1)us-gaap_ForeignCurrencyTransactionGainBeforeTax   (2.6)us-gaap_ForeignCurrencyTransactionGainBeforeTax   62.3us-gaap_ForeignCurrencyTransactionGainBeforeTax  
外币交易税前收益百分比   0.00%clf_ForeignCurrencyTransactionGainBeforeTaxPercent 0.00%clf_ForeignCurrencyTransactionGainBeforeTaxPercent (0.50%)clf_ForeignCurrencyTransactionGainBeforeTaxPercent (0.50%)clf_ForeignCurrencyTransactionGainBeforeTaxPercent (12.40%)clf_ForeignCurrencyTransactionGainBeforeTaxPercent (12.40%)clf_ForeignCurrencyTransactionGainBeforeTaxPercent
与非控制性权益有关的非应税损失（收入）   290.1clf_NonTaxableLossIncomeRelatedToNoncontrollingInterests   (1.5)clf_NonTaxableLossIncomeRelatedToNoncontrollingInterests   61.0clf_NonTaxableLossIncomeRelatedToNoncontrollingInterests  
与非控制性权益有关的非应税损失（收入）   (3.00%)clf_Nontaxablelossincomerelatedtononcontrollinginterestspercent (3.00%)clf_Nontaxablelossincomerelatedtononcontrollinginterestspercent (0.30%)clf_Nontaxablelossincomerelatedtononcontrollinginterestspercent (0.30%)clf_Nontaxablelossincomerelatedtononcontrollinginterestspercent (12.00%)clf_Nontaxablelossincomerelatedtononcontrollinginterestspercent (12.00%)clf_Nontaxablelossincomerelatedtononcontrollinginterestspercent
税法变化的影响   13.0clf_ImpactOfTaxLawChange   0clf_ImpactOfTaxLawChange   (357.1)clf_ImpactOfTaxLawChange  
税法变化百分比的影响   (0.10%)clf_ImpactOfTaxLawChangePercent (0.10%)clf_ImpactOfTaxLawChangePercent 0.00%clf_ImpactOfTaxLawChangePercent 0.00%clf_ImpactOfTaxLawChangePercent 71.20%clf_ImpactOfTaxLawChangePercent 71.20%clf_ImpactOfTaxLawChangePercent
所得税调整对超过成本消耗的消耗百分比进行税收扣除   (87.9)clf_IncomeTaxReconciliationTaxDeductionForPercentageDepletionInExcessOfCostDepletion   (97.6)clf_IncomeTaxReconciliationTaxDeductionForPercentageDepletionInExcessOfCostDepletion   (109.1)clf_IncomeTaxReconciliationTaxDeductionForPercentageDepletionInExcessOfCostDepletion  
所得税调整扣除超过成本消耗百分比的消耗百分比   0.90%clf_IncomeTaxReconciliationTaxDeductionforpercentagedepletioninexcessofcostdepletionpercent 0.90%clf_IncomeTaxReconciliationTaxDeductionforpercentagedepletioninexcessofcostdepletionpercent (19.90%)clf_IncomeTaxReconciliationTaxDeductionforpercentagedepletioninexcessofcostdepletionpercent (19.90%)clf_IncomeTaxReconciliationTaxDeductionforpercentagedepletioninexcessofcostdepletionpercent 21.70%clf_IncomeTaxReconciliationTaxDeductionforpercentagedepletioninexcessofcostdepletionpercent 21.70%clf_IncomeTaxReconciliationTaxDeductionforpercentagedepletioninexcessofcostdepletionpercent
有效所得税率调整，外国所得税率差异，金额   592.0us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential   (10.2)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential   65.2us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential  
有效所得税率调整，外国所得税率差异，百分比   (6.20%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (6.20%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (2.10%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (2.10%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (13.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (13.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
不需纳税的收入   (46.5)clf_IncomeNotSubjectToTax   (106.6)clf_IncomeNotSubjectToTax   (108.0)clf_IncomeNotSubjectToTax  
不受税率限制的收入   0.50%clf_Incomenotsubjecttotaxpercent 0.50%clf_Incomenotsubjecttotaxpercent (21.80%)clf_Incomenotsubjecttotaxpercent (21.80%)clf_Incomenotsubjecttotaxpercent 21.50%clf_Incomenotsubjecttotaxpercent 21.50%clf_Incomenotsubjecttotaxpercent
有效所得税税率调整，不可扣除费用，减值损失，金额   22.7us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses   20.5us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses   202.2us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses  
有效所得税税率调整，不可扣除费用，减值损失，百分比   (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses 4.20%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses 4.20%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses (40.30%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses (40.30%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
有效所得税税率调整，州和地方所得税，金额   (43.6)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes   5.6us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes   7.3us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes  
有效所得税税率调整，州和地方所得税，百分比   0.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 0.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (1.50%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (1.50%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
有效所得税率调整，税收结算，金额   (343.3)us-gaap_IncomeTaxReconciliationTaxSettlements   0us-gaap_IncomeTaxReconciliationTaxSettlements   0us-gaap_IncomeTaxReconciliationTaxSettlements  
有效所得税率调整，税收结算，百分比   3.60%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements 3.60%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements
所得税调节制造商扣除   0clf_IncomeTaxReconciliationManufacturersDeduction   (7.9)clf_IncomeTaxReconciliationManufacturersDeduction   (4.7)clf_IncomeTaxReconciliationManufacturersDeduction  
所得税对账，制造商扣除百分比   0.00%clf_IncomeTaxReconciliationManufacturersDeductionPercent 0.00%clf_IncomeTaxReconciliationManufacturersDeductionPercent (1.60%)clf_IncomeTaxReconciliationManufacturersDeductionPercent (1.60%)clf_IncomeTaxReconciliationManufacturersDeductionPercent 0.90%clf_IncomeTaxReconciliationManufacturersDeductionPercent 0.90%clf_IncomeTaxReconciliationManufacturersDeductionPercent
有效所得税税率调整，递延所得税资产估值准备的变化，金额   1,660.6us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance   73.0us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance   634.5us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance  
有效所得税税率调整，递延所得税资产估值准备的变化，百分比   (17.30%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (17.30%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 14.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 14.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (126.50%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (126.50%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
税收调整、结算和特殊规定   0.2us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions   19.6us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions   (14.8)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions  
税收调整、结算和特殊拨备百分比   0.00%clf_TaxAdjustmentsSettlementsAndUnusualProvisionsPercent 0.00%clf_TaxAdjustmentsSettlementsAndUnusualProvisionsPercent 5.30%clf_TaxAdjustmentsSettlementsAndUnusualProvisionsPercent 5.30%clf_TaxAdjustmentsSettlementsAndUnusualProvisionsPercent 2.90%clf_TaxAdjustmentsSettlementsAndUnusualProvisionsPercent 2.90%clf_TaxAdjustmentsSettlementsAndUnusualProvisionsPercent
有效所得税税率调整，上一年所得税，百分比   0.10%us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes (1040000000.00%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes (3.60%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes (1140000000.00%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes (570000000.00%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes
有效所得税率调整，其他调整，金额   16.5us-gaap_IncomeTaxReconciliationOtherAdjustments   2.9us-gaap_IncomeTaxReconciliationOtherAdjustments   (1.6)us-gaap_IncomeTaxReconciliationOtherAdjustments  
有效所得税率调整，其他调整，百分比   (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
费用（收益） (289.7美元)us-gaap_IncomeTaxExpenseBenefit 美元(1302 0)us-gaap_IncomeTaxExpenseBenefit   55.1美元us-gaap_IncomeTaxExpenseBenefit   255.9美元us-gaap_IncomeTaxExpenseBenefit  
所得税费用收益百分比   13.60%clf_IncomeTaxExpenseBenefitPercent 13.60%clf_IncomeTaxExpenseBenefitPercent 11.30%clf_IncomeTaxExpenseBenefitPercent 11.30%clf_IncomeTaxExpenseBenefitPercent (51.00%)clf_IncomeTaxExpenseBenefitPercent (51.00%)clf_IncomeTaxExpenseBenefitPercent