SEGMENT REPORTING - Schedule Of Segment Reporting Information, By Segment (Details) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2020
USD ($)
segments
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Dec. 31, 2019
USD ($)
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Dec. 31, 2018
USD ($)
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| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number of Operating Segments | segments | 4 | Ìý | Ìý |
| Number of Reportable Segments | segments | 1 | Ìý | Ìý |
| Revenues | $ 5,354 | $ 1,990 | $ 2,332 |
| Adjusted EBITDA, Earnings (Loss) | 353 | 525 | 766 |
| Realization of Deferred Revenue | 35 | 0 | 0 |
| Steelmaking [Member] | Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Revenues | 4,965 | 1,990 | 2,332 |
| Adjusted EBITDA, Earnings (Loss) | 433 | 636 | 872 |
| Other businesses | Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Revenues | 389 | 0 | 0 |
| Adjusted EBITDA, Earnings (Loss) | 47 | 0 | 0 |
| Corporate and Other Segments [Member] | Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Adjusted EBITDA, Earnings (Loss) | $ (127) | $ (111) | $ (106) |
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- Definition Adjusted EBITDA, Earnings (Loss) No definition available.
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- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. No definition available.
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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. No definition available.
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