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PROPERTY, PLANT AND EQUIPMENT (Tables)
3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment as of March 31, 2021 and December 31, 2020 consisted of the following (in millions):
20212020
Vehicles$9,901 $9,786 
Aircraft20,844 20,549 
Land2,042 2,052 
Buildings5,445 5,425 
Building and leasehold improvements4,960 4,921 
Plant equipment14,821 14,684 
Technology equipment2,736 2,626 
Construction-in-progress1,889 2,048 
62,638 62,091 
Less: Accumulated depreciation and amortization(30,183)(29,837)
Property, Plant and Equipment, Net$32,455 $32,254