XML 76 R62.htm IDEA: XBRL DOCUMENT
v3.5.0.2

FAIR VALUE MEASUREMENTS (Carrying Value And Fair Value Of Financial Instruments Disclosure) (Details) - USD ($) | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | $ 3,131,700,000 |  | $ 3,448,200,000
$700 Million 4.875% 2021 Senior Note [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 336,200,000 | [1],[2],[3],[4],[5],[6],[7],[8],[9] | 412,500,000
$400 Million 5.90% 2020 Senior Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 225,600,000 |  | 290,800,000
$500 Million 3.95% 2018 Senior Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 283,600,000 |  | 311,200,000
Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 540,000,000 |  | 540,000,000
Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 218,500,000 |  |
Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 430,100,000 |  | 544,200,000
Interest Rate Swap [Member] |  |  |
Long-term debt: |  |  |
Fair Value Adjustment to Interest Rate Hedge | 2,100,000 |  | 2,300,000
Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 2,507,200,000 |  | 2,699,400,000
Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |  |
Long-term debt: |  |  |
Fair Value Adjustment to Interest Rate Hedge | 2,100,000 |  | 2,300,000
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 2,108,100,000 |  | 898,200,000
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |  |
Long-term debt: |  |  |
Fair Value Adjustment to Interest Rate Hedge | 2,100,000 |  | 2,300,000
Senior Notes [Member] | $700 Million 4.875% 2021 Senior Note [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 700,000,000 |  | 700,000,000
Senior Notes [Member] | Senior Notes One Point Three Billion [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 1,300,000,000 |  | 1,300,000,000
Senior Notes [Member] | $400 Million 5.90% 2020 Senior Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 400,000,000 |  | 400,000,000
Senior Notes [Member] | $500 Million 3.95% 2018 Senior Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 500,000,000 |  | 500,000,000
Senior Notes [Member] | Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 540,000,000 |  |
Senior Notes [Member] | Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument, Original Face Value | 544,200,000 |  |
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $700 Million 4.875% 2021 Senior Note [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 334,700,000 |  | 410,600,000
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes One Point Three Billion [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 540,700,000 |  | 787,900,000
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $400 Million 5.90% 2020 Senior Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 224,300,000 |  | 288,900,000
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $500 Million 3.95% 2018 Senior Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 282,200,000 |  | 309,100,000
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 501,800,000 |  | 497,400,000
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 328,600,000 |  | 403,200,000
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | Revolving Credit Facility [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value |  |  | 0
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 292,800,000 |  | 0
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $700 Million 4.875% 2021 Senior Note [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 223,600,000 |  | 69,400,000
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes One Point Three Billion [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 349,600,000 |  | 137,400,000
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $400 Million 5.90% 2020 Senior Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 167,000,000 |  | 52,800,000
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $500 Million 3.95% 2018 Senior Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 268,000,000 |  | 87,100,000
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 548,100,000 |  | 414,500,000
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 352,700,000 |  | 134,700,000
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 197,000,000 |  | 0
Line of Credit [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | 0 |  | 0
Line of Credit [Member] | Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member] |  |  |
Long-term debt: |  |  |
Total long-term debt, fair value | $ 0 |  | $ 0
[1] | As of December 31, 2015, no loans were drawn under the ABL Facility and we had total availability of $366.0 million as a result of borrowing base limitations. As of December 31, 2015, the principal amount of letter of credit obligations totaled $186.3 million and commodity hedge obligations totaled $0.5 million, thereby further reducing available borrowing capacity on our ABL Facility to $179.2 million.
[2] | As of June 30, 2016, no loans were drawn under the ABL Facility and we had total availability of $425.6 million as a result of borrowing base limitations. As of June 30, 2016, the principal amount of letter of credit obligations totaled $112.8 million, thereby further reducing available borrowing capacity on our ABL Facility to $312.8 million.
[3] | On March 2, 2016, we exchanged as part of an exchange offer $114.1 million of the 7.75 percent senior notes for $57.0 million of the 8.00 percent 1.5 lien notes that are recorded at a carrying value of $76.3 million, including undiscounted interest payments as of June 30, 2016.
[4] | On March 2, 2016, we exchanged as part of an exchange offer $17.6 million of the 3.95 percent senior notes for $11.4 million of the 8.00 percent 1.5 lien notes that are recorded at a carrying value of $15.3 million, including undiscounted interest payments as of June 30, 2016. Additionally, during the first quarter of 2016 we entered into a debt for equity exchange; see NOTE 15 - CAPITAL STOCK for further discussion of this transaction.
[5] | On March 2, 2016, we exchanged as part of an exchange offer $194.4 million of the 6.25 percent senior notes for $75.8 million of the 8.00 percent 1.5 lien notes that are recorded at a carrying value of $101.5 million, including undiscounted interest payments as of June 30, 2016.
[6] | On March 2, 2016, we exchanged as part of an exchange offer $44.7 million of the 4.80 percent senior notes for $17.9 million of the 8.00 percent 1.5 lien notes that are recorded at a carrying value of $23.9 million, including undiscounted interest payments as of June 30, 2016. Additionally, during the second quarter of 2016 we entered into a debt for equity exchange; see NOTE 15 - CAPITAL STOCK for further discussion of this transaction.
[7] | On March 2, 2016, we exchanged as part of an exchange offer $65.1 million of the 5.90 percent senior notes for $26.0 million of the 8.00 percent 1.5 lien notes that are recorded at a carrying value of $34.9 million, including undiscounted interest payments as of June 30, 2016.
[8] | See the section entitled "$218.5 million 8.00 percent 2020 Senior Secured 1.5 Lien Notes - 2016 Exchange Offers" below for further discussion related to this instrument.
[9] | n March 2, 2016, we exchanged as part of an exchange offer $76.3 million of the 4.875 percent senior notes for $30.5 million of the 8.00 percent 1.5 lien notes that are recorded at a carrying value of $40.9 million, including undiscounted interest payments

X
- Definition Fair Value Adjustment to Interest Rate Hedge + References No definition available. + Details
Name: | clf_FairValueAdjustmenttoInterestRateHedge
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long Term Debt Noncurrent Fair Value [Abstract] + References No definition available. + Details
Name: | clf_LongTermDebtNoncurrentFairValueAbstract
Namespace Prefix: | clf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_SevenHundredMillionFourPointEightSevenFiveTwoThousandTwentyoneSeniorNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_FourHundredMillionFivePointNineZeroTwoThousandAndTwentySeniorNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_FiveHundredMillionThreePointNineFiveTwoThousandEighteenSeniorNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_FivehundredfortymillionEightpointtwofiveTwentytwentyFirstLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_TwohundredEighteenPointFiveMillionEightPointZeroTwentyTwentyOnePointFiveLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_FivehundredFortyfourMillionSevenPointSevenFiveTwentyTwentySecondLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=clf_SeniorNotesOnePointThreeBillionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |