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Property (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net, by Type [Abstract]
Total property	$ 67,449	$ 65,483
Less: accumulated depreciation	(28,699)	(26,725)
Total property, net	38,750	38,758
Depreciation, Amortization and Impairment [Abstract]
Depreciation and amortization expense	14,060	13,142	$ 11,967
Property, Plant and Equipment
Capitalized Interest and Software [Abstract]
Capitalized Software, Net	1,300	1,100
Depreciation, Amortization and Impairment [Abstract]
Depreciation and amortization expense	6,541	5,347	4,966
Impairment charges	7	466	199
Capitalized software amortization expense	452	424	$ 459
Land
Property, Plant and Equipment, Net, by Type [Abstract]
Total property	1,302	1,349
Buildings and Improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Total property	$ 9,705	9,173
Buildings and Improvements | Minimum
Property, Plant and Equipment, Net, by Type [Abstract]
Estimated Useful Life in Years	5 years
Buildings and Improvements | Maximum
Property, Plant and Equipment, Net, by Type [Abstract]
Estimated Useful Life in Years	40 years
Machinery and Equipment
Property, Plant and Equipment, Net, by Type [Abstract]
Total property	$ 29,814	26,453
Machinery and Equipment | Minimum
Property, Plant and Equipment, Net, by Type [Abstract]
Estimated Useful Life in Years	3 years
Machinery and Equipment | Maximum
Property, Plant and Equipment, Net, by Type [Abstract]
Estimated Useful Life in Years	27 years
Special Tools
Property, Plant and Equipment, Net, by Type [Abstract]
Total property	$ 23,586	23,828
Special Tools | Minimum
Property, Plant and Equipment, Net, by Type [Abstract]
Estimated Useful Life in Years	1 year
Special Tools | Maximum
Property, Plant and Equipment, Net, by Type [Abstract]
Estimated Useful Life in Years	13 years
Construction in Progress
Property, Plant and Equipment, Net, by Type [Abstract]
Total property	$ 3,042	$ 4,680

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of expense for amortization of capitalized computer software costs.

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