根据第13或15(d)条提交的季度报告

债务及信贷安排(长期债务一览表)(详情)

v2.4.1.9
债务及信贷安排(长期债务一览表)(详情)(美元)
3个月结束 12个月结束
2015年3月31日
2014年3月31日
2013年12月31日
2014年12月31日
2015年3月30日
债务文书〔细目〕          
清偿债务所得 313700000美元us-gaap_GainsLossesOnExtinguishmentOfDebt 0美元us-gaap_GainsLossesOnExtinguishmentOfDebt      
总面值 3621500000年us-gaap_DebtInstrumentFaceAmount     3980000000年us-gaap_DebtInstrumentFaceAmount  
未偿付信用证 136200000年us-gaap_LettersOfCreditOutstandingAmount     149500000年us-gaap_LettersOfCreditOutstandingAmount  
长期债务 2880900000年us-gaap_LongTermDebt     2843300000年us-gaap_LongTermDebt  
长期债务的流动部分 0us-gaap_LongTermDebtCurrent     0us-gaap_LongTermDebtCurrent  
长期债务非流动部分 2880900000年us-gaap_LongTermDebtNoncurrent     2843300000年us-gaap_LongTermDebtNoncurrent  
$7亿4.875% 2021优先票据[成员]          
债务文书〔细目〕          
债务工具,回购票面金额 58300000年us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
       
规定利率 4.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
    4.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
 
债务回购贴现 52.00%clf_DebtRepurchaseDiscount
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
       
债务票据,交换的票面金额 208500000年clf_DebtInstrumentFaceAmountExchanged
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
       
类型 固定   固定    
最后的期限 2021   2021    
总面值 700000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
    700000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
 
债务工具,票面价值 423200000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
    690000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
 
长期债务 422900000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
[1]     689500000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
[1]  
债务工具,未摊销贴现 300000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
    500000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
 
估算利率 4.89%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
    4.88%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
 
$5亿4.80% 2020优先票据[成员]          
债务文书〔细目〕          
债务工具,回购票面金额 43800000年us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
       
规定利率 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
    4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
 
债务回购贴现 54.30%clf_DebtRepurchaseDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
       
债务票据,交换的票面金额 137800000年clf_DebtInstrumentFaceAmountExchanged
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
       
类型 固定   固定    
最后的期限 2020   2020    
总面值 500000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
    500000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
 
债务工具,票面价值 308500000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
    490000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
 
长期债务 308100000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
[2]     489400000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
[2]  
债务工具,未摊销贴现 400000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
    600000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
 
估算利率 4.83%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
    4.83%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionFourPointEightZeroPercentSeniorNoteMember
 
$8亿6.25% 2040优先票据[成员]          
债务文书〔细目〕          
债务工具,回购票面金额 45900000年us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
       
规定利率 6.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
       
债务回购贴现 52.50%clf_DebtRepurchaseDiscount
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
       
债务票据,交换的票面金额 261300000年clf_DebtInstrumentFaceAmountExchanged
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
       
类型 固定   固定    
最后的期限 2040   2040    
总面值 800000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
       
债务工具,票面价值 492800000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
    800000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
 
长期债务 487000000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
[3]     790500000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
[3]  
债务工具,未摊销贴现 5800000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
    9500000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
 
估算利率 6.34%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
    6.34%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_EightHundredMillionSixPointTwoFivePercentSeniorNotesDueTwoThousandFortyMember
 
$4亿5.90% 2020优先票据[成员]          
债务文书〔细目〕          
债务工具,回购票面金额 1300000年us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
       
规定利率 5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
    5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
 
债务回购贴现 58.00%clf_DebtRepurchaseDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
       
债务票据,交换的票面金额 67000000年clf_DebtInstrumentFaceAmountExchanged
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
       
类型 固定   固定    
最后的期限 2020   2020    
总面值 400000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
    400000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
 
债务工具,票面价值 326800000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
    395000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
 
长期债务 325700000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
[4]     393700000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
[4]  
债务工具,未摊销贴现 1100000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
    1300000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
 
估算利率 5.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
    5.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
 
$5亿3.95% 2018优先票据[成员]          
债务文书〔细目〕          
债务工具,回购票面金额 44000000年us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
       
规定利率 3.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
    3.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
 
债务回购贴现 77.50%clf_DebtRepurchaseDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
       
类型 固定   固定    
最后的期限 2018   2018    
总面值 500000000 .0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
    500000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
 
债务工具,票面价值 436000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
    480000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
 
长期债务 433800000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
[5]     477400000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
[5]  
债务工具,未摊销贴现 2200000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
    2600000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
 
估算利率 6.32%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
    5.17%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
 
五亿四千万八亿二千零二十二第一留置权票据[成员]          
债务文书〔细目〕          
规定利率 8.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
       
类型 固定        
最后的期限 2020        
总面值 540000000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
    0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
 
债务工具,票面价值 540000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
       
长期债务 503500000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
[5]        
债务工具,未摊销贴现 36500000 .0us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
       
估算利率 9.97%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
       
五亿四千四百万七亿七千二百二十二张留置权票[成员]          
债务文书〔细目〕          
规定利率 7.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
在4亿美元5.90%票据的债务交换中收到的折扣 15500000年clf_DiscountReceivedinDebtExchangeof400M5.90Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
债务工具,在4亿美元5.90%票据的债务交换中收到的面值 57500000年clf_DebtInstrumentFaceAmountReceivedinDebtExchangeof400M5.90Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
债务工具,在8亿美元6.25%票据的债务交换中收到的面值 203500000年clf_DebtInstrumentFaceAmountReceivedinDebtExchangeof800M6.25Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
8亿美元6.25%票据的债务交换贴现 55000000年clf_DiscountReceivedinDebtExchangeof800M6.25Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
5亿美元4.80%票据的债务交换贴现 30500000年clf_DiscountReceivedinDebtExchangeof500M4.80Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
债务工具,在5亿美元债务交换中收到的面值4.80%票据 112900000年clf_DebtInstrumentFaceAmountReceivedinDebtExchangeof500M4.80Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
7亿美元4.875%票据的债务交换贴现 46000000年clf_DiscountReceivedinDebtExchangeof700M4.875Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
债务工具,在债务交换中收到的面值为7亿美元4.875%的票据 170300000年clf_DebtinstrumentFaceAmountReceivedinDebtExchangeof700M4.875Notes
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
类型 固定        
最后的期限 2020        
总面值 544200000年us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
    0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
 
债务工具,票面价值 544200000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
长期债务 397200000年us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
[5]        
债务工具,未摊销贴现 147000000年us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
       
估算利率 15.55%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
    15.55%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
 
循环信贷安排〔成员〕          
债务文书〔细目〕          
类型 变量   变量    
最后的期限 2020   2017    
债务工具,票面价值 550000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
    1125000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
900000000年clf_DebtInstrumentParValue
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
信用额度,未偿金额 0us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
[6]     0us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
[7]  
循环信贷额度、借款能力 441100000年us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
       
未偿付信用证 136200000年us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
    149500000年us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
外汇套期保值义务 5500000年clf_ForeignExchangeHedgeObligations
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
       
估算利率 0.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
    2.94%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
信贷额度剩余能力 299400000年us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
    975500000年us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
利率掉期〔成员〕          
债务文书〔细目〕          
利率套期保值的公允价值调整 2700000年clf_FairValueAdjustmenttoInterestRateHedge
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    2800000年clf_FairValueAdjustmenttoInterestRateHedge
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债务回购[成员]| $7亿4.875% 2021优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 20000000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务回购【成员】| 5亿美元4.80% 2020优先票据【成员】          
债务文书〔细目〕          
清偿债务所得 15600000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务回购[成员]| 8亿美元6.25% 2040优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 15000000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务回购[成员]| 4亿美元5.90% 2020优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 300000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务回购[成员]| 5亿美元3.95% 2018年优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 7100000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务交换[成员]| $7亿4.875% 2021优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 83100000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务交换[成员]| 5亿美元4.80% 2020年优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 54600000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务交换[成员]| 8亿美元6.25% 2040优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 107300000年us-gaap_GainsLossesOnExtinguishmentOfDebt
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债务交换[成员]| 4亿美元5.90% 2020优先票据[成员]          
债务文书〔细目〕          
清偿债务所得 24500000美元us-gaap_GainsLossesOnExtinguishmentOfDebt
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[1] 2015年第一季度,我们以52.0%的折扣购买了5830万美元的4.875%的优先票据,这导致了2000万美元的抵销收益。此外,2015年3月27日,作为要约的一部分,我们以4.875%优先票据中的2.085亿美元交换了7.75%第二留置权票据中的1.703亿美元,基于15.55%的估算利率,折扣率为4600万美元,产生了8310万美元的消灭收益,扣除未摊销的原始发行折扣和递延发起费用。截至2015年3月31日,基于4.89%的估算利率,7亿美元4.875%的优先票据的票面价值为4.232亿美元减去30万美元的未摊销折扣。截至2014年12月31日,按4.88%的估算利率,7亿美元4.875%的优先票据的票面价值为6.9亿美元减去50万美元的未摊销折扣。
[2] 在2015年第一季度,我们以54.3%的折扣购买了4380万美元的4.80%优先票据,这导致了1560万美元的抵销收益。此外,在2015年3月27日,作为要约的一部分,我们以1.378亿美元的4.80%优先票据交换了1.129亿美元的7.75%第二留置权票据,基于15.55%的估算利率,折扣价为3050万美元,产生了5460万美元的消灭收益,扣除未摊销的原始发行折扣和递延发起费用。截至2015年3月31日,根据4.83%的估算利率,5亿美元4.80%的优先票据的票面价值为3.085亿美元减去40万美元的未摊销折扣。截至2014年12月31日,5亿美元4.80%的优先票据的票面价值为4.9亿美元,扣除未摊销折扣60万美元,估算利率为4.83%。
[3] 2015年第一季度,我们以52.5%的折扣率购买了4590万美元未偿还的6.25%优先票据,这导致了1500万美元的抵销收益。此外,在2015年3月27日,作为要约的一部分,我们以2.613亿美元的6.25%优先票据交换了2.035亿美元的7.75%第二留置权票据,基于15.55%的估算利率,折扣价为5500万美元,产生了1.073亿美元的消灭收益,扣除未摊销的原始发行折扣和递延发起费用。截至2015年3月31日,根据6.34%的估算利率,8亿美元6.25%的优先票据的票面价值为4.928亿美元减去580万美元的未摊销折扣。截至2014年12月31日,按6.34%的估算利率,8亿美元6.25%的优先票据的票面价值为8亿美元减去950万美元的未摊销折扣。
[4] 在2015年第一季度,我们购买了价值130万美元的5.90%的优先票据,这些票据以58.0%的折扣进行交易,这导致了30万美元的抵销收益。此外,在2015年3月27日,作为要约的一部分,我们以5.90%优先票据中的6700万美元交换了7.75%第二留置权票据中的5750万美元,基于15.55%的估算利率,折扣价为1550万美元,产生了2450万美元的消灭收益,扣除未摊销的原始发行折扣和递延发起费用。截至2015年3月31日,根据5.98%的估算利率,4.04亿美元5.90%的优先票据的票面价值为3.268亿美元减去110万美元的未摊销折扣。截至2014年12月31日,4.04亿美元5.90%优先级票据的票面价值为3.95亿美元,扣除未摊销折扣130万美元,估算利率为5.98%。
[5] 2015年第一季度,我们以77.5%的折扣购买了价值4400万美元的3.95%的优先票据,这导致了710万美元的债务清偿收益。截至2015年3月31日,基于6.32%的估算利率,5亿美元3.95%的优先票据的票面价值为4.36亿美元减去220万美元的未摊销折扣。截至2014年12月31日,5亿美元3.95%的优先票据的票面价值为4.8亿美元,扣除未摊销折扣260万美元,估算利率为5.17%。
[6] 截至2015年3月31日,ABL基金下没有贷款,由于借款基础限制,我们的可用资金总额为4.411亿美元。截至2015年3月31日,信用证义务的本金总额为1.362亿美元,外汇对冲义务总额为550万美元,从而进一步将我们ABL Facility的可用借款能力降低至2.994亿美元。
[7] 截至2014年12月31日,我们没有根据循环信贷协议提取的循环贷款,该协议的可用性为11.25亿美元。截至2014年12月31日,信用证义务的本金总额为1.495亿美元,从而进一步将循环信贷协议的可用借款能力降低至9.755亿美元。