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Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.8.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2018
Apr. 20, 2018
Document and Entity Information [Abstract] Ìý Ìý
Entity Registrant Name CLEVELAND-CLIFFS INC. Ìý
Entity Central Index Key 0000764065 Ìý
Current Fiscal Year End Date --12-31 Ìý
Entity Filer Category Large Accelerated Filer Ìý
Document Type 10-Q Ìý
Document Period End Date Mar. 31, 2018 Ìý
Document Fiscal Year Focus 2018 Ìý
Document Fiscal Period Focus Q1 Ìý
Amendment Flag false Ìý
Entity Common Stock, Shares Outstanding Ìý 297,733,061
Trading Symbol clf Ìý
Entity Well-known Seasoned Issuer Yes Ìý
Entity Voluntary Filers No Ìý
Entity Current Reporting Status Yes Ìý