DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Statements Of Financial Performance Location Table) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
---|---|---|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
Derivative [Line Items] | ||
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) | $ (7.1)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet | $ (2.3)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (6.3)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet | (12.8)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet |
Australian Dollar Foreign Exchange Contract Hedge Designation [Member] | ||
Derivative [Line Items] | ||
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) |
(2.6)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractHedgeDesignationMember |
5.5us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractHedgeDesignationMember |
Australian Dollar Foreign Exchange Contract Hedge Designation [Member] | Product Revenues [Member] | ||
Derivative [Line Items] | ||
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |
(6.3)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractHedgeDesignationMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesRevenueGoodsNetMember |
(9.1)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractHedgeDesignationMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SalesRevenueGoodsNetMember |
Australian Dollar Foreign Exchange Contracts Hedge Prior to De Designation [Member] | ||
Derivative [Line Items] | ||
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) |
(4.5)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |
0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_AustralianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
Canadian Dollar Foreign Exchange Contracts Hedge Designation [Member] | ||
Derivative [Line Items] | ||
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) |
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgeDesignationMember |
(7.8)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgeDesignationMember |
Canadian Dollar Foreign Exchange Contracts Hedge Designation [Member] | Cost of Sales [Member] | ||
Derivative [Line Items] | ||
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |
0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgeDesignationMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember |
(3.4)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgeDesignationMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember |
Canadian Dollar Foreign Exchange Contracts Hedge Prior to De Designation [Member] | ||
Derivative [Line Items] | ||
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) |
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |
$ 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
$ (0.3)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = clf_CanadianDollarForeignExchangeContractsHedgePriortoDeDesignationMember |
X | ||||||||||
- Definition
The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|