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SEGMENT REPORTING - Depreciation, Depletion and Amortization and Capital Additions By Segment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Depreciation, depletion and amortization $ (1,034) $ (897) $ (308)
Capital additions 1,033 857 483
Steelmaking      
Segment Reporting Information [Line Items]      
Depreciation, depletion and amortization (994) (860) (281)
Capital additions 997 787 436
Other Businesses      
Segment Reporting Information [Line Items]      
Depreciation, depletion and amortization (40) (37) (27)
Capital additions 30 52 45
Corporate/Eliminations      
Segment Reporting Information [Line Items]      
Capital additions $ 6 $ 18 $ 2