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DEBT AND CREDIT FACILITIES - Debt Redemption (Details) - Cleveland-Cliffs Inc. | 3 Months Ended
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Mar. 31, 2021
4.625% 2029 Senior Notes |
Debt Instrument, Redemption [Line Items] |
Repurchase price if triggering event occurs | 101.00%
4.625% 2029 Senior Notes | Debt Instrument, Redemption, Period One, Upon Equity Issuance |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 104.625%
4.625% 2029 Senior Notes | Debt Instrument, Redemption, Period One |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 100.00%
4.625% 2029 Senior Notes | Debt Instrument, Redemption, Period Two |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 102.313%
4.625% 2029 Senior Notes | Debt Instrument, Redemption, Period Three |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 101.156%
4.625% 2029 Senior Notes | Debt Instrument, Redemption, Period Four |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 100.00%
4.875% 2031 Senior Notes |
Debt Instrument, Redemption [Line Items] |
Repurchase price if triggering event occurs | 101.00%
4.875% 2031 Senior Notes | Debt Instrument, Redemption, Period One, Upon Equity Issuance |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 104.875%
4.875% 2031 Senior Notes | Debt Instrument, Redemption, Period One |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 100.00%
4.875% 2031 Senior Notes | Debt Instrument, Redemption, Period Two |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 102.438%
4.875% 2031 Senior Notes | Debt Instrument, Redemption, Period Three |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 101.625%
4.875% 2031 Senior Notes | Debt Instrument, Redemption, Period Four |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 100.813%
4.875% 2031 Senior Notes | Debt Instrument, Redemption, Period Five |
Debt Instrument, Redemption [Line Items] |
Debt Instrument, Redemption Price, Percentage | 100.00%

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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