Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION Property, Plant and Equipment (Details)

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BASIS OF PRESENTATION Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 55,365 $ 54,488
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 28,118 27,912
Building and leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 4,461 4,323
Vehicles    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 9,936 9,820
Aircraft    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 17,625 17,499
Land    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 2,056 2,000
Buildings    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 4,844 4,808
Plant equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 11,899 11,833
Technology equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 2,097 2,093
Construction-in-progress    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 2,447 $ 2,112