Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT (Details)

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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment $ 12,118   $ 12,118   $ 11,526
Allowance for depreciation and depletion (3,088)   (3,088)   (2,340)
Property, plant and equipment, net 9,030   9,030   9,186
Finance lease, right-of-use asset 389   389   411
Depreciation and depletion expense 235 $ 238 782 $ 661  
Middletown          
Property, Plant and Equipment [Line Items]          
Accelerated depreciation     23    
Indiana Harbor          
Property, Plant and Equipment [Line Items]          
Accelerated depreciation     68    
Land, land improvements and mineral rights          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 1,396   1,396   1,291
Buildings          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 914   914   889
Equipment          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 9,042   9,042   8,709
Other          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 232   232   229
Construction in progress          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment $ 534   $ 534   $ 408