XML 115 R97.htm IDEA: XBRL DOCUMENT
v3.8.0.1

SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Cash Flows) (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Net Cash Provided by (Used in) Operating Activities | $ (142.9) | $ (25.1) |  |
Property, Plant and Equipment, Cash Additions | (12.4) | (25.9) |  |
Purchase of property, plant and equipment | (59.0) | (2.0) |  |
Intercompany investments | 0.0 | 0.0 |  |
Other investing activities | 0.0 | 0.5 |  |
Net Cash Provided by (Used in) Investing Activities | (71.4) | (27.4) |  |
Net proceeds from issuance of common shares | 0.0 | 661.3 |  |
Proceeds from issuance of debt | 0.0 | 500.0 |  |
Debt issuance costs | (1.5) | (8.5) |  |
Gain (Loss) on Repurchase of Debt Instrument |  | (1,115.5) |  |
Distributions of partnership equity | 0.0 | (8.7) |  |
Intercompany financing | 0.0 | 0.0 |  |
Other financing activities | (5.5) | (5.6) |  |
Net Cash Provided by (Used in) Financing Activities | (7.0) | 23.0 |  |
EFFECT OF EXCHANGE RATE CHANGES ON CASH | 0.2 | 1.4 |  |
Cash and Cash Equivalents, Period Increase (Decrease) | (221.1) | (28.1) |  |
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale | 786.6 | 295.3 | $ 1,007.7 | $ 323.4
Reportable Legal Entities [Member] | Cliffs Shareholders Equity [Member] |  |  |  |
Net Cash Provided by (Used in) Operating Activities | (54.7) | (99.5) |  |
Property, Plant and Equipment, Cash Additions | 0.0 | (0.8) |  |
Purchase of property, plant and equipment | 0.0 | 0.0 |  |
Intercompany investments | (137.7) | (56.5) |  |
Other investing activities |  | 0.0 |  |
Net Cash Provided by (Used in) Investing Activities | (137.7) | (57.3) |  |
Net proceeds from issuance of common shares |  | 661.3 |  |
Proceeds from issuance of debt |  | 500.0 |  |
Debt issuance costs | (1.5) | (8.5) |  |
Gain (Loss) on Repurchase of Debt Instrument |  | (1,115.5) |  |
Distributions of partnership equity |  | 0.0 |  |
Intercompany financing | 0.0 | 45.1 |  |
Other financing activities | (1.4) | (0.5) |  |
Net Cash Provided by (Used in) Financing Activities | (2.9) | 81.9 |  |
EFFECT OF EXCHANGE RATE CHANGES ON CASH | 0.0 | 0.0 |  |
Cash and Cash Equivalents, Period Increase (Decrease) | (195.3) | (74.9) |  |
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale | 753.6 | 208.5 | 948.9 | 283.4
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] |  |  |  |
Net Cash Provided by (Used in) Operating Activities | (62.8) | (19.7) |  |
Property, Plant and Equipment, Cash Additions | (8.1) | (24.9) |  |
Purchase of property, plant and equipment | (0.8) | (2.0) |  |
Intercompany investments | (4.8) | (0.5) |  |
Other investing activities |  | 0.5 |  |
Net Cash Provided by (Used in) Investing Activities | (13.7) | (26.9) |  |
Net proceeds from issuance of common shares |  | 0.0 |  |
Proceeds from issuance of debt |  | 0.0 |  |
Debt issuance costs | 0.0 | 0.0 |  |
Gain (Loss) on Repurchase of Debt Instrument |  | 0.0 |  |
Distributions of partnership equity |  | (8.7) |  |
Intercompany financing | 75.9 | 55.8 |  |
Other financing activities | (0.5) | (0.7) |  |
Net Cash Provided by (Used in) Financing Activities | 75.4 | 46.4 |  |
EFFECT OF EXCHANGE RATE CHANGES ON CASH | 0.0 | 0.0 |  |
Cash and Cash Equivalents, Period Increase (Decrease) | (1.1) | (0.2) |  |
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale | 1.0 | 2.3 | 2.1 | 2.5
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] |  |  |  |
Net Cash Provided by (Used in) Operating Activities | (25.4) | 94.1 |  |
Property, Plant and Equipment, Cash Additions | (4.3) | (0.2) |  |
Purchase of property, plant and equipment | (58.2) | 0.0 |  |
Intercompany investments | 0.0 | (45.0) |  |
Other investing activities |  | 0.0 |  |
Net Cash Provided by (Used in) Investing Activities | (62.5) | (45.2) |  |
Net proceeds from issuance of common shares |  | 0.0 |  |
Proceeds from issuance of debt |  | 0.0 |  |
Debt issuance costs | 0.0 | 0.0 |  |
Gain (Loss) on Repurchase of Debt Instrument |  | 0.0 |  |
Distributions of partnership equity |  | 0.0 |  |
Intercompany financing | 66.6 | 1.1 |  |
Other financing activities | (3.6) | (4.4) |  |
Net Cash Provided by (Used in) Financing Activities | 63.0 | (3.3) |  |
EFFECT OF EXCHANGE RATE CHANGES ON CASH | 0.2 | 1.4 |  |
Cash and Cash Equivalents, Period Increase (Decrease) | (24.7) | 47.0 |  |
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale | 32.0 | 84.5 | 56.7 | 37.5
Consolidation, Eliminations [Member] |  |  |  |
Net Cash Provided by (Used in) Operating Activities | 0.0 | 0.0 |  |
Property, Plant and Equipment, Cash Additions | 0.0 | 0.0 |  |
Purchase of property, plant and equipment | 0.0 | 0.0 |  |
Intercompany investments | 142.5 | 102.0 |  |
Other investing activities |  | 0.0 |  |
Net Cash Provided by (Used in) Investing Activities | 142.5 | 102.0 |  |
Net proceeds from issuance of common shares |  | 0.0 |  |
Proceeds from issuance of debt |  | 0.0 |  |
Debt issuance costs | 0.0 | 0.0 |  |
Gain (Loss) on Repurchase of Debt Instrument |  | 0.0 |  |
Distributions of partnership equity |  | 0.0 |  |
Intercompany financing | (142.5) | (102.0) |  |
Other financing activities | 0.0 | 0.0 |  |
Net Cash Provided by (Used in) Financing Activities | (142.5) | (102.0) |  |
EFFECT OF EXCHANGE RATE CHANGES ON CASH | 0.0 | 0.0 |  |
Cash and Cash Equivalents, Period Increase (Decrease) | 0.0 | 0.0 |  |
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0

X
- Definition Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale + References No definition available. + Details
Name: | clf_CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Intercompany financing + References No definition available. + Details
Name: | clf_Intercompanyfinancing
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Intercompany investments + References No definition available. + Details
Name: | clf_Intercompanyinvestments
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Property, Plant and Equipment, Cash Additions + References No definition available. + Details
Name: | clf_PropertyPlantandEquipmentCashAdditions
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 + Details
Name: | us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 + Details
Name: | us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) from the difference between the repurchase price of a debt instrument initially issued by the entity and the net carrying amount of the debt at the time of its repurchase. + References No definition available. + Details
Name: | us-gaap_GainLossOnRepurchaseOfDebtInstrument
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3574-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3574-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInOperatingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDistributionsToAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
Name: | us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_ReportableLegalEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=us-gaap_ParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=us-gaap_GuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=us-gaap_NonGuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_ConsolidationEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |