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PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross $ 76,000 $ 75,162
Less: Accumulated depreciation and amortization (37,971) (37,431)
Property, Plant and Equipment, Net 38,029 37,731
Vehicles    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 11,762 11,787
Aircraft(1)    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 24,458 24,149
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 2,038 2,046
Buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 6,960 6,906
Building and leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 5,687 5,686
Plant equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 20,183 19,817
Technology equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross 2,671 2,635
Construction-in-progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment and finance lease right-of-use asset, gross $ 2,241 $ 2,136