v3.26.1
Warrants - Stellantis N.V. (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Apr. 27, 2026
shares
Jan. 03, 2023
USD ($)
tranche
$ / shares
shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Warrants price per share (in dollars per share)     $ 0.01  
Research and development | $     $ 171.7 $ 103.7
Stellantis N.V.        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Warrants price per share (in dollars per share)   $ 0.01    
Warrants, weighted average grant date fair value (in dollars per share)   $ 1.93    
Stellantis N.V. | Warrant Exercisable Period One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Founder grants, number of tranches | tranche   3,000    
Award vesting period (in years)   12 months    
Stellantis N.V. | Warrant Exercisable Period Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (in years)   24 months    
Stellantis N.V. | Warrant Exercisable Period Three        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (in years)   36 months    
Stellantis N.V. | Warrants For Collaboration Agreement With FCA US LLC        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Research and development | $     $ 0.1 $ 0.8
Stellantis N.V. | Class A        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Sale of stock value | $   $ 150.0    
Number of securities called by warrants or rights (in shares) | shares   15,000,000.0    
Stock price (in dollars per share)   $ 1.93    
FCA US LLC | Warrants For Collaboration Agreement With FCA US LLC        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of securities called by warrants or rights (in shares) | shares     1,671,202  
Warrants price per share (in dollars per share)     $ 0.01  
FCA US LLC | Warrants For Collaboration Agreement With FCA US LLC | Subsequent Event        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Conversion of stock (in shares) | shares 1,669,783