Segment Reporting and Information about Geographic Areas - Schedule of Total Revenues and Gross Profit by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	$ 16,934	$ 11,958	$ 35,690	$ 22,347
Gross profit	4,234	2,884	9,694	5,099
Automotive Segment [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	16,068	11,157	34,208	21,052
Gross profit	4,137	2,864	9,669	5,180
Energy Generation and Storage [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	866	801	1,482	1,295
Gross profit	$ 97	$ 20	$ 25	$ (81)