v3.26.1
STOCKHOLDERS’ EQUITY (DEFICIT) - Narrative (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 16, 2025
USD ($)
day
vehicle
Sep. 30, 2025
USD ($)
$ / shares
shares
Mar. 31, 2026
shares
Mar. 31, 2025
shares
Dec. 31, 2021
$ / shares
shares
Class of Stock [Line Items]          
Shares repurchased (in shares)     0 0 85,782
Shares repurchased, repurchase price (in dollars per share) | $ / shares         $ 241.50
SMB | 2025 Subscription Agreement          
Class of Stock [Line Items]          
Consideration to be received on agreement | $ $ 300.0        
Sale of stock, arithmetic average daily volume-weighted average price of common stock, consecutive trading days | day 30        
Number of shares issued (in shares)   13,715,121      
Weighted average price (in dollars per share) | $ / shares   $ 21.87      
Net proceeds received | $   $ 299.7      
Commissions and other issuance cost | $   $ 0.3      
Sale of stock, period after close when share transfer is not permitted 18 months        
Employees          
Class of Stock [Line Items]          
Shares repurchased (in shares)         71,274
Board of Directors of Atieva          
Class of Stock [Line Items]          
Shares repurchased (in shares)         14,508
Vehicle Production Agreement | Uber          
Class of Stock [Line Items]          
Long-term purchase commitment minimum quantity required | vehicle 20,000