Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue by Major Source (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation Of Revenue [Line Items]
Revenues	$ 22,496	$ 25,500	$ 41,831	$ 46,801
Total revenues from sales and services
Disaggregation Of Revenue [Line Items]
Revenues	21,918	24,894	40,697	45,606
Automotive sales
Disaggregation Of Revenue [Line Items]
Revenues	15,787	18,530	28,712	34,990
Automotive regulatory credits
Disaggregation Of Revenue [Line Items]
Revenues	439	890	1,034	1,332
Energy generation and storage sales
Disaggregation Of Revenue [Line Items]
Revenues	2,646	2,866	5,267	4,388
Services and other
Disaggregation Of Revenue [Line Items]
Revenues	3,046	2,608	5,684	4,896
Automotive leasing
Disaggregation Of Revenue [Line Items]
Revenues	435	458	882	934
Energy generation and storage leasing
Disaggregation Of Revenue [Line Items]
Revenues	$ 143	$ 148	$ 252	$ 261