10-K Filing

CLEVELAND-CLIFFS INC. CIK: 764065 FY 2018

Filing Information

Form Type	10-K
Accession Number	`0000764065-19-000025`
Period End Date	20181231
Filing Date	20190208
Fiscal Year	2018
Fiscal Period	FY
XBRL Instance	clf-20181231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 105 Income Statement 160 Cash Flow Statement 104 Stockholders Equity 49 Comprehensive Income 29

Balance Sheet 105 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$978.30M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$823.20M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$106.70M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$226.70M	USD	Point-in-time
Inventories	`InventoryNet`	$87.90M	USD	Point-in-time
Inventories	`InventoryNet`	$138.40M	USD	Point-in-time
Supplies and other inventories	`Supplies`	$88.80M	USD	Point-in-time
Supplies and other inventories	`Supplies`	$93.20M	USD	Point-in-time
Derivative assets	`DerivativeAssetsCurrent`	$91.50M	USD	Point-in-time
Preferred stock, par value	`PreferredStockParOrStatedValuePerShare`	-	USD	Point-in-time
Preferred stock, par value	`PreferredStockParOrStatedValuePerShare`	-	USD	Point-in-time
Derivative assets	`DerivativeAssetsCurrent`	$37.90M	USD	Point-in-time
Income tax receivable, current	`IncomeTaxesReceivable`	$13.30M	USD	Point-in-time
Income tax receivable, current	`IncomeTaxesReceivable`	$117.30M	USD	Point-in-time
Loans to and accounts receivables from the Canadian Entities	`LoanstoandaccountsreceivablesfromtheCanadianEntities`	$51.60M	USD	Point-in-time
Loans to and accounts receivables from the Canadian Entities	`LoanstoandaccountsreceivablesfromtheCanadianEntities`	-	USD	Point-in-time
Current assets of discontinued operations	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$12.40M	USD	Point-in-time
Current assets of discontinued operations	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$118.50M	USD	Point-in-time
Common shares, par value	`CommonStockParOrStatedValuePerShare`	$0.12	USD	Point-in-time
Common shares, par value	`CommonStockParOrStatedValuePerShare`	$0.12	USD	Point-in-time
Common shares, authorized (in shares)	`CommonStockSharesAuthorized`	600.00M	shares	Point-in-time
Other current assets	`OtherAssetsCurrent`	$11.10M	USD	Point-in-time
Common shares, authorized (in shares)	`CommonStockSharesAuthorized`	600.00M	shares	Point-in-time
Other current assets	`OtherAssetsCurrent`	$27.40M	USD	Point-in-time
Common shares, issued (in shares)	`CommonStockSharesIssued`	301.89M	shares	Point-in-time
TOTAL CURRENT ASSETS	`AssetsCurrent`	$1.54B	USD	Point-in-time
TOTAL CURRENT ASSETS	`AssetsCurrent`	$1.48B	USD	Point-in-time
Common shares, issued (in shares)	`CommonStockSharesIssued`	301.89M	shares	Point-in-time
PROPERTY, PLANT AND EQUIPMENT, NET	`PropertyPlantAndEquipmentNet`	$1.03B	USD	Point-in-time
Common shares, outstanding (in shares)	`CommonStockSharesOutstanding`	297.40M	shares	Point-in-time
PROPERTY, PLANT AND EQUIPMENT, NET	`PropertyPlantAndEquipmentNet`	$1.29B	USD	Point-in-time
Common shares, outstanding (in shares)	`CommonStockSharesOutstanding`	292.61M	shares	Point-in-time
Common shares in treasury	`TreasuryStockShares`	9.28M	shares	Point-in-time
Common shares in treasury	`TreasuryStockShares`	4.49M	shares	Point-in-time
Deposits for property, plant and equipment	`PrepaidExpenseAndOtherAssets`	$17.80M	USD	Point-in-time
Deposits for property, plant and equipment	`PrepaidExpenseAndOtherAssets`	$83.00M	USD	Point-in-time
Income tax receivable, non-current	`IncomeTaxesReceivableNoncurrent`	$121.30M	USD	Point-in-time
Income tax receivable, non-current	`IncomeTaxesReceivableNoncurrent`	$235.30M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$464.80M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	-	USD	Point-in-time
Non-current assets of discontinued operations	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	$20.30M	USD	Point-in-time
Non-current assets of discontinued operations	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	-	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$101.60M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$94.90M	USD	Point-in-time
TOTAL ASSETS	`Assets`	$1.92B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$2.95B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$3.53B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$186.80M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$99.50M	USD	Point-in-time
Accrued employment costs	`EmployeeRelatedLiabilitiesCurrent`	$74.00M	USD	Point-in-time
Accrued employment costs	`EmployeeRelatedLiabilitiesCurrent`	$52.70M	USD	Point-in-time
State and local taxes payable	`TaxesPayableCurrent`	$30.20M	USD	Point-in-time
State and local taxes payable	`TaxesPayableCurrent`	$35.50M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$38.40M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$31.40M	USD	Point-in-time
Contingent claims	`ReserveforunassertedclaimsinCCAA`	$55.60M	USD	Point-in-time
Contingent claims	`ReserveforunassertedclaimsinCCAA`	-	USD	Point-in-time
Partnership distribution payable	`ShortTermNonBankLoansAndNotesPayable`	$44.20M	USD	Point-in-time
Partnership distribution payable	`ShortTermNonBankLoansAndNotesPayable`	$43.50M	USD	Point-in-time
Current liabilities of discontinued operations	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$75.00M	USD	Point-in-time
Current liabilities of discontinued operations	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$6.70M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$63.60M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$83.30M	USD	Point-in-time
TOTAL CURRENT LIABILITIES	`LiabilitiesCurrent`	$468.20M	USD	Point-in-time
TOTAL CURRENT LIABILITIES	`LiabilitiesCurrent`	$452.20M	USD	Point-in-time
Pensions	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$222.80M	USD	Point-in-time
Pensions	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$218.40M	USD	Point-in-time
Other postretirement benefits	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$34.90M	USD	Point-in-time
Other postretirement benefits	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$30.30M	USD	Point-in-time
TOTAL POSTEMPLOYMENT BENEFIT LIABILITIES	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$248.70M	USD	Point-in-time
TOTAL POSTEMPLOYMENT BENEFIT LIABILITIES	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$257.70M	USD	Point-in-time
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS	`MineReclamationAndClosingLiabilityNoncurrent`	$172.00M	USD	Point-in-time
ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS	`MineReclamationAndClosingLiabilityNoncurrent`	$167.70M	USD	Point-in-time
LONG-TERM DEBT	`LongTermDebtNoncurrent`	$2.09B	USD	Point-in-time
LONG-TERM DEBT	`LongTermDebtNoncurrent`	$2.30B	USD	Point-in-time
NON-CURRENT LIABILITIES OF DISCONTINUED OPERATIONS	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	$8.30M	USD	Point-in-time
NON-CURRENT LIABILITIES OF DISCONTINUED OPERATIONS	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	$52.20M	USD	Point-in-time
OTHER LIABILITIES	`OtherLiabilitiesNoncurrent`	$163.50M	USD	Point-in-time
OTHER LIABILITIES	`OtherLiabilitiesNoncurrent`	$115.30M	USD	Point-in-time
TOTAL LIABILITIES	`Liabilities`	$3.11B	USD	Point-in-time
TOTAL LIABILITIES	`Liabilities`	$3.40B	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES (SEE NOTE 19)	`CommitmentsAndContingencies`	-	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES (SEE NOTE 19)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common Shares - par value $0.125 per share, Authorized - 600,000,000 shares (2017 - 600,000,000 shares); Issued - 301,886,794 shares (2017 - 301,886,794) shares); Outstanding - 292,611,569 shares (2017 - 297,400,968) shares)	`CommonStockValueOutstanding`	$37.70M	USD	Point-in-time
Common Shares - par value $0.125 per share, Authorized - 600,000,000 shares (2017 - 600,000,000 shares); Issued - 301,886,794 shares (2017 - 301,886,794) shares); Outstanding - 292,611,569 shares (2017 - 297,400,968) shares)	`CommonStockValueOutstanding`	$37.70M	USD	Point-in-time
Capital in excess of par value of shares	`AdditionalPaidInCapital`	$3.93B	USD	Point-in-time
Capital in excess of par value of shares	`AdditionalPaidInCapital`	$3.92B	USD	Point-in-time
Retained deficit	`RetainedEarningsAccumulatedDeficit`	$-4.21B	USD	Point-in-time
Retained deficit	`RetainedEarningsAccumulatedDeficit`	$-3.06B	USD	Point-in-time
Cost of 9,275,225 common shares in treasury (2017 - 4,485,826 shares)	`TreasuryStockValue`	$186.10M	USD	Point-in-time
Cost of 9,275,225 common shares in treasury (2017 - 4,485,826 shares)	`TreasuryStockValue`	$169.60M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-18.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-21.30M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-39.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-283.90M	USD	Point-in-time
TOTAL CLIFFS SHAREHOLDERS' EQUITY (DEFICIT)	`StockholdersEquity`	$-444.30M	USD	Point-in-time
TOTAL CLIFFS SHAREHOLDERS' EQUITY (DEFICIT)	`StockholdersEquity`	$424.20M	USD	Point-in-time
NONCONTROLLING INTEREST	`MinorityInterest`	$200.00K	USD	Point-in-time
NONCONTROLLING INTEREST	`MinorityInterest`	-	USD	Point-in-time
TOTAL EQUITY (DEFICIT)	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-1.33B	USD	Point-in-time
TOTAL EQUITY (DEFICIT)	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$424.20M	USD	Point-in-time
TOTAL EQUITY (DEFICIT)	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-1.81B	USD	Point-in-time
TOTAL EQUITY (DEFICIT)	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-444.10M	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY (DEFICIT)	`LiabilitiesAndStockholdersEquity`	$3.53B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY (DEFICIT)	`LiabilitiesAndStockholdersEquity`	$2.95B	USD	Point-in-time

Income Statement 160 line items

Line Item	Tag	Value	Unit	Period
Product revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$2.17B	USD	Annual
Product revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$1.64B	USD	Annual
Product revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$1.38B	USD	Annual
Freight and Reimbursement Revenue	`FreightandReimbursementRevenue`	$174.80M	USD	Annual
Freight and Reimbursement Revenue	`FreightandReimbursementRevenue`	$221.40M	USD	Annual
Freight and Reimbursement Revenue	`FreightandReimbursementRevenue`	$160.10M	USD	Annual
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$2.33B	USD	Annual
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$714.30M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$1.55B	USD	Annual
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$511.80M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$741.80M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$596.70M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$180.00M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$471.30M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$286.20M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$696.30M	USD	1 Quarter
TOTAL REVENUES FROM PRODUCT SALES AND SERVICES	`Revenues`	$1.87B	USD	Annual
COST OF GOODS SOLD AND OPERATING EXPENSES	`CostOfGoodsAndServicesSold`	$1.27B	USD	Annual
COST OF GOODS SOLD AND OPERATING EXPENSES	`CostOfGoodsAndServicesSold`	$1.52B	USD	Annual
COST OF GOODS SOLD AND OPERATING EXPENSES	`CostOfGoodsAndServicesSold`	$1.40B	USD	Annual
SALES MARGIN	`GrossProfit`	$202.00M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$144.70M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$116.10M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$467.60M	USD	Annual
SALES MARGIN	`GrossProfit`	$61.50M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$809.60M	USD	Annual
SALES MARGIN	`GrossProfit`	$280.10M	USD	Annual
SALES MARGIN	`GrossProfit`	$261.60M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$49.00M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$157.80M	USD	1 Quarter
SALES MARGIN	`GrossProfit`	$284.50M	USD	1 Quarter
Selling, general and administrative expenses	`SellingGeneralAndAdministrativeExpense`	$116.80M	USD	Annual
Selling, general and administrative expenses	`SellingGeneralAndAdministrativeExpense`	$102.90M	USD	Annual
Selling, general and administrative expenses	`SellingGeneralAndAdministrativeExpense`	$115.80M	USD	Annual
Miscellaneous - net	`OtherOperatingIncomeExpenseNet`	$-33.60M	USD	Annual
Miscellaneous - net	`OtherOperatingIncomeExpenseNet`	$25.50M	USD	Annual
Miscellaneous - net	`OtherOperatingIncomeExpenseNet`	$-19.60M	USD	Annual
Other operating expense	`OperatingExpenses`	$77.40M	USD	Annual
Other operating expense	`OperatingExpenses`	$136.40M	USD	Annual
Other operating expense	`OperatingExpenses`	$149.40M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$390.20M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$130.70M	USD	Annual
OPERATING INCOME	`OperatingIncomeLoss`	$673.20M	USD	Annual
Interest expense, net	`InterestIncomeExpenseNet`	$-118.90M	USD	Annual
Interest expense, net	`InterestIncomeExpenseNet`	$-193.90M	USD	Annual
Interest expense, net	`InterestIncomeExpenseNet`	$-126.80M	USD	Annual
Gain (loss) on extinguishment/restructuring of debt	`GainsLossesOnExtinguishmentOfDebt`	$-165.40M	USD	Annual
Gain (loss) on extinguishment/restructuring of debt	`GainsLossesOnExtinguishmentOfDebt`	$166.30M	USD	Annual
Gain (loss) on extinguishment/restructuring of debt	`GainsLossesOnExtinguishmentOfDebt`	$-6.80M	USD	Annual
Other non-operating income	`OtherNonoperatingIncomeExpense`	$7.30M	USD	Annual
Other non-operating income	`OtherNonoperatingIncomeExpense`	$10.20M	USD	Annual
Other non-operating income	`OtherNonoperatingIncomeExpense`	$17.20M	USD	Annual
TOTAL OTHER INCOME (EXPENSE)	`NonoperatingIncomeExpense`	$-20.30M	USD	Annual
TOTAL OTHER INCOME (EXPENSE)	`NonoperatingIncomeExpense`	$-108.50M	USD	Annual
TOTAL OTHER INCOME (EXPENSE)	`NonoperatingIncomeExpense`	$-282.00M	USD	Annual
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$110.40M	USD	Annual
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$564.70M	USD	Annual
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$108.20M	USD	Annual
INCOME TAX BENEFIT	`IncomeTaxExpenseBenefit`	$-252.40M	USD	Annual
INCOME TAX BENEFIT	`IncomeTaxExpenseBenefit`	$-475.20M	USD	Annual
INCOME TAX BENEFIT	`IncomeTaxExpenseBenefit`	$-12.20M	USD	Annual
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$22.30M	USD	1 Quarter
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$83.80M	USD	1 Quarter
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$333.00M	USD	1 Quarter
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$122.60M	USD	Annual
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$1.04B	USD	Annual
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$360.60M	USD	Annual
INCOME FROM CONTINUING OPERATIONS	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$-78.50M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$2.50M	USD	Annual
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$88.20M	USD	Annual
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-64.30M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$30.60M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-14.60M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-23.10M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$238.00M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-53.70M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$48.70M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-70.90M	USD	1 Quarter
INCOME FROM DISCONTINUED OPERATIONS, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$76.70M	USD	Annual
NET INCOME	`ProfitLoss`	$363.10M	USD	Annual
NET INCOME	`ProfitLoss`	$1.13B	USD	Annual
NET INCOME	`ProfitLoss`	$199.30M	USD	Annual
LOSS (INCOME) ATTRIBUTABLE TO NONCONTROLLING INTEREST	`NetIncomeLossAttributableToNoncontrollingInterest`	$25.20M	USD	Annual
LOSS (INCOME) ATTRIBUTABLE TO NONCONTROLLING INTEREST	`NetIncomeLossAttributableToNoncontrollingInterest`	$-3.90M	USD	Annual
LOSS (INCOME) ATTRIBUTABLE TO NONCONTROLLING INTEREST	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	Annual
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$1.13B	USD	Annual
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$174.10M	USD	Annual
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLossAvailableToCommonStockholdersBasic`	$367.00M	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.12	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.28	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$-0.05	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.27	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$3.50	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$-0.29	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.49	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.77	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.08	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.67	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.11	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$-0.22	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$-0.05	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.01	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$-0.18	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.10	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.80	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.30	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$-0.08	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$-0.24	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.39	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare`	$0.18	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$1.47	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$-0.29	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$-0.11	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$1.04	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$0.10	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$1.28	USD	Annual
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$0.88	USD	Annual
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$0.18	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$2.06	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$0.55	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Basic:	`EarningsPerShareBasic`	$3.80	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.03	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$-0.05	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.76	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.49	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$-0.29	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$3.42	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.64	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.08	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.25	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.28	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.11	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.24	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.08	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.29	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.21	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.38	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.18	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.01	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.10	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$0.77	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.18	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.05	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$-0.29	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$1.26	USD	Annual
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$1.98	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$3.71	USD	Annual
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$0.55	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$-0.11	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$0.87	USD	Annual
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$1.03	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$0.18	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$0.10	USD	1 Quarter
Earnings (Loss) per Common Share Attributable to Cliffs Common Shareholders - Diluted:	`EarningsPerShareDiluted`	$1.41	USD	1 Quarter
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	297.20M	shares	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	288.40M	shares	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	197.70M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	304.10M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	200.10M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	293.00M	shares	Annual

Cash Flow Statement 104 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$363.10M	USD	Annual
Net income	`ProfitLoss`	$1.13B	USD	Annual
Net income	`ProfitLoss`	$199.30M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$89.00M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$87.70M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$115.40M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-460.50M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	-	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	-	USD	Annual
Loss (gain) on extinguishment of debt	`Gainonextinguishmentofdebtcashflows`	$-165.40M	USD	Annual
Loss (gain) on extinguishment of debt	`Gainonextinguishmentofdebtcashflows`	$-6.80M	USD	Annual
Loss (gain) on extinguishment of debt	`Gainonextinguishmentofdebtcashflows`	$166.30M	USD	Annual
Loss on deconsolidation	`LossonDeconsolidationnetofcashdeconsolidated`	-	USD	Annual
Loss on deconsolidation	`LossonDeconsolidationnetofcashdeconsolidated`	$20.20M	USD	Annual
Loss on deconsolidation	`LossonDeconsolidationnetofcashdeconsolidated`	$17.50M	USD	Annual
Gain on derivatives	`UnrealizedGainLossOnDerivativesAndCommodityContracts`	$110.20M	USD	Annual
Gain on derivatives	`UnrealizedGainLossOnDerivativesAndCommodityContracts`	$4.10M	USD	Annual
Gain on derivatives	`UnrealizedGainLossOnDerivativesAndCommodityContracts`	$30.10M	USD	Annual
Gain on foreign currency translation	`ForeignCurrencyTransactionGainLossRealized`	-	USD	Annual
Gain on foreign currency translation	`ForeignCurrencyTransactionGainLossRealized`	-	USD	Annual
Gain on foreign currency translation	`ForeignCurrencyTransactionGainLossRealized`	$228.10M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-25.30M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-20.70M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-40.10M	USD	Annual
Receivables and other assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$248.70M	USD	Annual
Receivables and other assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$-52.30M	USD	Annual
Receivables and other assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$-43.20M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-42.90M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-157.80M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$1.80M	USD	Annual
Payables, accrued expenses and other liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-73.90M	USD	Annual
Payables, accrued expenses and other liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-62.50M	USD	Annual
Payables, accrued expenses and other liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-69.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$303.00M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$478.50M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$338.10M	USD	Annual
Purchase of property, plant and equipment	`PropertyPlantandEquipmentCashAdditions`	$-208.60M	USD	Annual
Purchase of property, plant and equipment	`PropertyPlantandEquipmentCashAdditions`	$-61.70M	USD	Annual
Purchase of property, plant and equipment	`PropertyPlantandEquipmentCashAdditions`	$-134.90M	USD	Annual
Deposits for property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$87.50M	USD	Annual
Deposits for property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$16.80M	USD	Annual
Deposits for property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$7.40M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$4.30M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-11.20M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-23.00M	USD	Annual
Net cash used by investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-57.90M	USD	Annual
Net cash used by investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-156.00M	USD	Annual
Net cash used by investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-273.10M	USD	Annual
Net proceeds from issuance of common shares	`ProceedsFromIssuanceOfCommonStock`	$661.30M	USD	Annual
Net proceeds from issuance of common shares	`ProceedsFromIssuanceOfCommonStock`	$287.40M	USD	Annual
Net proceeds from issuance of common shares	`ProceedsFromIssuanceOfCommonStock`	-	USD	Annual
Repurchase of common shares	`StockRepurchasedDuringPeriodValue`	-	USD	Annual
Repurchase of common shares	`StockRepurchasedDuringPeriodValue`	$47.50M	USD	Annual
Repurchase of common shares	`StockRepurchasedDuringPeriodValue`	-	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfSeniorLongTermDebt`	-	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfSeniorLongTermDebt`	-	USD	Annual
Proceeds from issuance of debt	`ProceedsFromIssuanceOfSeniorLongTermDebt`	$1.77B	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$28.60M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$1.50M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$5.20M	USD	Annual
Borrowings under credit facilities	`ProceedsFromLongTermLinesOfCredit`	-	USD	Annual
Borrowings under credit facilities	`ProceedsFromLongTermLinesOfCredit`	-	USD	Annual
Borrowings under credit facilities	`ProceedsFromLongTermLinesOfCredit`	$105.00M	USD	Annual
Repayment under credit facilities	`RepaymentsOfLongTermLinesOfCredit`	-	USD	Annual
Repayment under credit facilities	`RepaymentsOfLongTermLinesOfCredit`	$105.00M	USD	Annual
Repayment under credit facilities	`RepaymentsOfLongTermLinesOfCredit`	-	USD	Annual
Repayments on equipment loans	`Repaymentsofequipmentloans`	$95.60M	USD	Annual
Repayments on equipment loans	`Repaymentsofequipmentloans`	-	USD	Annual
Repayments on equipment loans	`Repaymentsofequipmentloans`	-	USD	Annual
Repurchase of debt	`GainLossOnRepurchaseOfDebtInstrument`	$305.40M	USD	Annual
Repurchase of debt	`GainLossOnRepurchaseOfDebtInstrument`	$1.72B	USD	Annual
Repurchase of debt	`GainLossOnRepurchaseOfDebtInstrument`	$234.50M	USD	Annual
Acquisition of noncontrolling interest	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	-	USD	Annual
Acquisition of noncontrolling interest	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	-	USD	Annual
Acquisition of noncontrolling interest	`PaymentsForRepurchaseOfRedeemableNoncontrollingInterest`	$105.00M	USD	Annual
Distributions of partnership equity	`PaymentsOfDistributionsToAffiliates`	$59.90M	USD	Annual
Distributions of partnership equity	`PaymentsOfDistributionsToAffiliates`	$44.20M	USD	Annual
Distributions of partnership equity	`PaymentsOfDistributionsToAffiliates`	$52.90M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-26.70M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-27.70M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-47.50M	USD	Annual
Net cash provided (used) by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-206.40M	USD	Annual
Net cash provided (used) by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$498.90M	USD	Annual
Net cash provided (used) by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-375.20M	USD	Annual
EFFECT OF EXCHANGE RATE CHANGES ON CASH	`EffectOfExchangeRateOnCashAndCashEquivalents`	$-500.00K	USD	Annual
EFFECT OF EXCHANGE RATE CHANGES ON CASH	`EffectOfExchangeRateOnCashAndCashEquivalents`	$3.30M	USD	Annual
EFFECT OF EXCHANGE RATE CHANGES ON CASH	`EffectOfExchangeRateOnCashAndCashEquivalents`	$-2.30M	USD	Annual
Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations	`IncreaseDecreaseinCashandCashEquivalentsIncludingCashClassifiedWithinCurrentAssetsofDiscontinuedOperations`	$684.30M	USD	Annual
Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations	`IncreaseDecreaseinCashandCashEquivalentsIncludingCashClassifiedWithinCurrentAssetsofDiscontinuedOperations`	$38.20M	USD	Annual
Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations	`IncreaseDecreaseinCashandCashEquivalentsIncludingCashClassifiedWithinCurrentAssetsofDiscontinuedOperations`	$-172.10M	USD	Annual
LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS	`IncreaseDecreaseinCashandCashEquivalentsinCashClassifiedwithinCurrentAssetsofDiscontinuedOperations`	$17.00M	USD	Annual
LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS	`IncreaseDecreaseinCashandCashEquivalentsinCashClassifiedwithinCurrentAssetsofDiscontinuedOperations`	$-18.80M	USD	Annual
LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS	`IncreaseDecreaseinCashandCashEquivalentsinCashClassifiedwithinCurrentAssetsofDiscontinuedOperations`	$35.30M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$73.50M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-155.10M	USD	Annual
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$665.50M	USD	Annual
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$312.80M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$978.30M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$823.20M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$239.30M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$312.80M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$978.30M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$823.20M	USD	Point-in-time
CASH AND CASH EQUIVALENTS AT END OF YEAR	`CashAndCashEquivalentsAtCarryingValueIncludingAssetsHeldForSale`	$239.30M	USD	Point-in-time

Stockholders Equity 49 line items

Line Item	Tag	Value	Unit	Period
Common Stock, Dividends, Per Share, Declared	`CommonStockDividendsPerShareDeclared`	$0.05	USD	Annual
Common Stock, Dividends, Per Share, Declared	`CommonStockDividendsPerShareDeclared`	-	USD	Annual
Common Stock, Dividends, Per Share, Declared	`CommonStockDividendsPerShareDeclared`	-	USD	Annual
Balance, beginning of period (in shares)	`CommonStockSharesOutstanding`	297.40M	shares	Point-in-time
Balance, beginning of period (in shares)	`CommonStockSharesOutstanding`	292.61M	shares	Point-in-time
Balance, beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-1.33B	USD	Point-in-time
Balance, beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$424.20M	USD	Point-in-time
Balance, beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-1.81B	USD	Point-in-time
Balance, beginning of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-444.10M	USD	Point-in-time
NET INCOME	`ProfitLoss`	$363.10M	USD	Annual
NET INCOME	`ProfitLoss`	$1.13B	USD	Annual
NET INCOME	`ProfitLoss`	$199.30M	USD	Annual
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-4.00M	USD	Annual
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-3.30M	USD	Annual
Other Comprehensive Loss	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-244.90M	USD	Annual
OTHER COMPREHENSIVE INCOME	`OtherComprehensiveIncomeLossNetOfTax`	$-244.90M	USD	Annual
OTHER COMPREHENSIVE INCOME	`OtherComprehensiveIncomeLossNetOfTax`	$-2.90M	USD	Annual
OTHER COMPREHENSIVE INCOME	`OtherComprehensiveIncomeLossNetOfTax`	$-3.80M	USD	Annual
Pension and OPEB liability, net of tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-11.50M	USD	Annual
Pension and OPEB liability, net of tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$19.80M	USD	Annual
Pension and OPEB liability, net of tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$17.20M	USD	Annual
Total comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$883.20M	USD	Annual
Total comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$360.20M	USD	Annual
Total comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$195.50M	USD	Annual
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	`NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification`	$34.00M	USD	Annual
Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature	`AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature`	$83.40M	USD	Annual
Distributions to noncontrolling interest	`UndistributedEarningsLossesRelatedToNoncontrollingInterests`	$-3.20M	USD	Annual
Distributions to noncontrolling interest	`UndistributedEarningsLossesRelatedToNoncontrollingInterests`	$-200.00K	USD	Annual
Distributions of partnership equity	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$57.50M	USD	Annual
Distributions of partnership equity	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$128.80M	USD	Annual
Capital contributions by noncontrolling interest to subsidiary	`Capitalcontributionsbynoncontrollinginteresttosubsidiary`	$1.80M	USD	Annual
Stock and other incentive plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$13.70M	USD	Annual
Stock and other incentive plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$13.50M	USD	Annual
Stock and other incentive plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$13.80M	USD	Annual
Stock Repurchased During Period, Shares	`StockRepurchasedDuringPeriodShares`	5.40M	shares	Annual
Repurchase of common shares	`StockRepurchasedDuringPeriodValue`	-	USD	Annual
Repurchase of common shares	`StockRepurchasedDuringPeriodValue`	$47.50M	USD	Annual
Repurchase of common shares	`StockRepurchasedDuringPeriodValue`	-	USD	Annual
Common stock dividends ($0.05 per share)	`DividendsCommonStock`	$15.00M	USD	Annual
Debt for equity exchange (value)	`Debtforequityexchangevalue`	$45.20M	USD	Annual
Common stock issuance (value)	`Commonstockissuancevalue`	$287.40M	USD	Annual
Common stock issuance (value)	`Commonstockissuancevalue`	$661.30M	USD	Annual
Acquisition of Noncontrolling Interest	`MinorityInterestDecreaseFromRedemptions`	$-105.00M	USD	Annual
Balance, end of period (in shares)	`CommonStockSharesOutstanding`	297.40M	shares	Point-in-time
Balance, end of period (in shares)	`CommonStockSharesOutstanding`	292.61M	shares	Point-in-time
Balance, end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-1.33B	USD	Point-in-time
Balance, end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$424.20M	USD	Point-in-time
Balance, end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-1.81B	USD	Point-in-time
Balance, end of period	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-444.10M	USD	Point-in-time

Comprehensive Income 29 line items

Line Item	Tag	Value	Unit	Period
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$-28.10M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$53.40M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$367.00M	USD	Annual
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$31.80M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$-84.30M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$609.50M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$1.13B	USD	Annual
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$437.80M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$309.90M	USD	1 Quarter
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$174.10M	USD	Annual
NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`NetIncomeLoss`	$165.10M	USD	1 Quarter
Changes in pension and other post-retirement benefits, net of tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-11.50M	USD	Annual
Changes in pension and other post-retirement benefits, net of tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$19.80M	USD	Annual
Changes in pension and other post-retirement benefits, net of tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$17.20M	USD	Annual
Changes in foreign currency translation	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$18.60M	USD	Annual
Changes in foreign currency translation	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-13.90M	USD	Annual
Changes in foreign currency translation	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-225.40M	USD	Annual
Changes in derivative financial instruments, net of tax	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$-500.00K	USD	Annual
Changes in derivative financial instruments, net of tax	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$-2.30M	USD	Annual
Changes in derivative financial instruments, net of tax	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$-2.60M	USD	Annual
OTHER COMPREHENSIVE LOSS	`OtherComprehensiveIncomeLossNetOfTax`	$-244.90M	USD	Annual
OTHER COMPREHENSIVE LOSS	`OtherComprehensiveIncomeLossNetOfTax`	$-2.90M	USD	Annual
OTHER COMPREHENSIVE LOSS	`OtherComprehensiveIncomeLossNetOfTax`	$-3.80M	USD	Annual
OTHER COMPREHENSIVE LOSS (INCOME) ATTRIBUTABLE TO THE NONCONTROLLING INTEREST	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$-500.00K	USD	Annual
OTHER COMPREHENSIVE LOSS (INCOME) ATTRIBUTABLE TO THE NONCONTROLLING INTEREST	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	Annual
OTHER COMPREHENSIVE LOSS (INCOME) ATTRIBUTABLE TO THE NONCONTROLLING INTEREST	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$1.10M	USD	Annual
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$363.00M	USD	Annual
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$883.20M	USD	Annual
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS	`ComprehensiveIncomeNetOfTax`	$170.80M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.