v3.26.1
Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue by Major Source (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation Of Revenue [Line Items]    
Revenues $ 22,387 $ 19,335
Total revenues from sales and services    
Disaggregation Of Revenue [Line Items]    
Revenues 21,903 18,779
Automotive sales    
Disaggregation Of Revenue [Line Items]    
Revenues 15,473 12,925
Automotive regulatory credits    
Disaggregation Of Revenue [Line Items]    
Revenues 380 595
Energy generation and storage sales    
Disaggregation Of Revenue [Line Items]    
Revenues 2,305 2,621
Services and other    
Disaggregation Of Revenue [Line Items]    
Revenues 3,745 2,638
Automotive leasing    
Disaggregation Of Revenue [Line Items]    
Revenues 381 447
Energy generation and storage leasing    
Disaggregation Of Revenue [Line Items]    
Revenues $ 103 $ 109