Quarterly report pursuant to Section 13 or 15(d)

REVENUES - Revenues By Product Line (Details)

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REVENUES - Revenues By Product Line (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Disaggregation of Revenue [Line Items]        
Revenues $ 4,569 $ 5,605 $ 14,860 $ 16,884
Steelmaking        
Disaggregation of Revenue [Line Items]        
Revenues 4,419 5,443 14,361 16,377
Steelmaking | Hot-rolled steel        
Disaggregation of Revenue [Line Items]        
Revenues 1,003 1,269 3,246 3,747
Steelmaking | Cold-rolled steel        
Disaggregation of Revenue [Line Items]        
Revenues 671 651 2,131 2,038
Steelmaking | Coated steel        
Disaggregation of Revenue [Line Items]        
Revenues 1,377 1,748 4,546 5,154
Steelmaking | Stainless and electrical steel        
Disaggregation of Revenue [Line Items]        
Revenues 449 568 1,390 1,757
Steelmaking | Plate        
Disaggregation of Revenue [Line Items]        
Revenues 237 382 887 1,112
Steelmaking | Slab and other steel products        
Disaggregation of Revenue [Line Items]        
Revenues 276 322 929 1,015
Steelmaking | Other        
Disaggregation of Revenue [Line Items]        
Revenues 406 503 1,232 1,554
Other Businesses        
Disaggregation of Revenue [Line Items]        
Revenues 150 162 499 507
Other Businesses | Other        
Disaggregation of Revenue [Line Items]        
Revenues $ 150 $ 162 $ 499 $ 507