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
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment $ 10,702   $ 10,217
Allowance for depreciation and depletion (1,688)   (1,474)
Property, plant and equipment, net 9,014   8,743
Finance Lease, Right-of-Use Asset 365   361
Depreciation and depletion expense 215 $ 36  
Land, land improvements and mineral rights      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment 1,241   1,213
Buildings      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment 1,004   703
Equipment      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment 7,877   6,786
Other      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment 173   151
Construction in progress      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment $ 407   $ 1,364