Segment Reporting and Information about Geographic Areas - Schedule of Total Revenues and Gross Profit by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	$ 25,182	$ 23,350	$ 71,983	$ 71,606
Gross profit	4,997	4,178	13,271	13,222
Automotive segment
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	22,806	21,791	64,958	67,009
Gross profit	4,272	3,797	11,403	12,395
Energy generation and storage segment
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	2,376	1,559	7,025	4,597
Gross profit	$ 725	$ 381	$ 1,868	$ 827