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 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment $ 10,878   $ 10,878   $ 10,217
Allowance for depreciation and depletion (1,896)   (1,896)   (1,474)
Property, plant and equipment, net 8,982   8,982   8,743
Finance lease, right-of-use asset 376   376   361
Depreciation and depletion expense 208 $ 75 423 $ 111  
Land, land improvements and mineral rights          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 1,274   1,274   1,213
Buildings          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 865   865   703
Equipment          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 8,104   8,104   6,786
Other          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment 205   205   151
Construction in progress          
Property, Plant and Equipment [Line Items]          
Total property, plant and equipment $ 430   $ 430   $ 1,364