Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment, Net (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 16,662	$ 14,130
Less: Accumulated depreciation	(4,814)	(3,734)
Property, plant and equipment, net	11,848	10,396
Machinery, equipment, vehicles and office furniture [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	7,943	7,167
Tooling [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	1,794	1,493
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	1,291	1,087
Land and buildings [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	3,245	3,024
Computer equipment, hardware and software [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	782	595
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 1,607	$ 764