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REVENUES - By Market and Product Line (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 21,996 | $ 22,989 | $ 20,444
Steelmaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 21,331 | 22,383 | 19,901
Steelmaking | Hot-rolled steel |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 4,864 | 4,529 | 5,615
Steelmaking | Cold-rolled steel |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 2,658 | 3,193 | 3,186
Steelmaking | Coated steel |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 6,661 | 6,905 | 5,864
Steelmaking | Stainless and electrical steel |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 2,281 | 2,284 | 1,622
Steelmaking | Plate |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 1,444 | 1,651 | 1,316
Steelmaking | Slab and other steel products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 1,329 | 1,492 | 1,247
Steelmaking | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 2,094 | 2,329 | 1,051
Other Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 665 | 606 | 543
Other Businesses | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 665 | 606 | 543
Automotive | Steelmaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 7,440 | 6,661 | 4,726
Automotive | Other Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 545 | 478 | 426
Infrastructure and manufacturing | Steelmaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 5,612 | 5,869 | 5,380
Infrastructure and manufacturing | Other Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 38 | 52 | 47
Distributors and converters | Steelmaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 5,330 | 6,388 | 7,671
Distributors and converters | Other Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 82 | 76 | 70
Steel producers | Steelmaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 2,949 | $ 3,465 | $ 2,124

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