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PROPERTY, PLANT AND EQUIPMENT (Tables)
 6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, plant and equipment as of June 30, 2021 and December 31, 2020 consisted of the following (in millions):
20212020
Vehicles$9,963 $9,786 
Aircraft21,093 20,549 
Land2,056 2,052 
Buildings5,699 5,425 
Building and leasehold improvements4,980 4,921 
Plant equipment15,132 14,684 
Technology equipment2,774 2,626 
Construction-in-progress1,632 2,048 
63,329 62,091 
Less: Accumulated depreciation and amortization(30,698)(29,837)
Property, Plant and Equipment, Net$32,631 $32,254