Annual report [Section 13 and 15(d), not S-K Item 405]

PROPERTY, PLANT AND EQUIPMENT - Narrative (Details)

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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]      
Depreciation $ 903 $ 932 $ 988
Depletion 29 33 38
Property, plant and equipment, net 9,942 8,895 $ 9,070
Right-of-use assets related to finance leases 505 306  
Operating lease, right-of-use asset 351 228  
Finance 63 49  
Operating 50 41  
Finance 319 166  
Operating $ 275 197  
Middletown      
Property, Plant and Equipment [Line Items]      
Accelerated depreciation   23  
Indiana Harbor      
Property, Plant and Equipment [Line Items]      
Accelerated depreciation   $ 68