v3.26.3
Redeemable Convertible Preferred Stock and Shareholders’ Equity - Schedule of Common Stock Activity (Details) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Common Stock        
Balance, beginning of period $ 127,224 $ 5,217 $ 2,573 $ 4,863
Common stock issued, net $ 51 $ 116   923
Conversion of stock       $ 1
Repurchase of common stock (in shares) 0 (18)   (47)
Repurchase of common stock   $ (3)   $ (523)
Transfer of equity in business combinations $ 42,723   42,723 39
Balance, end of period $ 176,768 $ 4,655 $ 176,768 $ 4,655
Share Repurchases from Current and Former xAI Employees        
Common Stock        
Repurchase of common stock (in shares)     (25)  
Repurchase of common stock     $ (2,413)  
Share Repurchases from Existing Shareholders        
Common Stock        
Repurchase of common stock (in shares)     (41)  
Repurchase of common stock     $ (1,944)  
Conversion of redeemable convertible preferred stock pursuant to xAI Merger        
Common Stock        
Conversion of stock     37,475  
Conversion of redeemable convertible preferred stock to common stock        
Common Stock        
Conversion of stock     7,076  
IPO        
Common Stock        
Common stock issued, net     85,675  
Issuances Excluding IPO        
Common Stock        
Common stock issued, net     $ 2,259  
Class A Common Stock        
Common Stock        
Balances, beginning of period (in shares)     1,952  
Balances, end of period (in shares) 8,240   8,240  
Class B Common Stock        
Common Stock        
Balances, beginning of period (in shares)     644  
Balances, end of period (in shares) 5,339   5,339  
Class C Common Stock        
Common Stock        
Balances, beginning of period (in shares)     482  
Balances, end of period (in shares) 0   0  
Common Stock        
Common Stock        
Balances, beginning of period (in shares) 13,176 3,048 3,079 3,023
Balance, beginning of period $ 13 $ 4 $ 4 $ 3
Common stock issued, net (in shares) 9 11   62
Common stock issued, net $ 0 $ 0   $ 1
Conversion of stock (in shares)       2
Conversion of stock       $ 0
Repurchase of common stock (in shares)   (18)   (47)
Repurchase of common stock   $ 0   $ 0
Transfer of equity in business combinations (in shares) 394   394 1
Transfer of equity in business combinations $ 0     $ 0
Balances, end of period (in shares) 13,579 3,041 13,579 3,041
Balance, end of period $ 13 $ 4 $ 13 $ 4
Common Stock | Share Repurchases from Current and Former xAI Employees        
Common Stock        
Repurchase of common stock (in shares)     (25)  
Repurchase of common stock     $ 0  
Common Stock | Share Repurchases from Existing Shareholders        
Common Stock        
Repurchase of common stock (in shares)     (41)  
Repurchase of common stock     $ 0  
Common Stock | Conversion of redeemable convertible preferred stock pursuant to xAI Merger        
Common Stock        
Conversion of stock (in shares)     1,424  
Conversion of stock     $ 1  
Common Stock | Conversion of redeemable convertible preferred stock to common stock        
Common Stock        
Conversion of stock (in shares)     6,728  
Conversion of stock     $ 6  
Common Stock | IPO        
Common Stock        
Common stock issued, net (in shares)     639  
Common stock issued, net     $ 1  
Common Stock | Issuances Excluding IPO        
Common Stock        
Common stock issued, net (in shares)     1,381  
Common stock issued, net     $ 1  
Common Stock | Class A Common Stock        
Common Stock        
Balances, beginning of period (in shares) 7,607 1,867 1,952 1,832
Balance, beginning of period $ 7 $ 3 $ 3 $ 2
Common stock issued, net (in shares)   2   23
Common stock issued, net   $ 0   $ 1
Conversion of stock (in shares)   23    
Conversion of stock   $ 0    
Repurchase of common stock (in shares)   (5)   (19)
Repurchase of common stock   $ 0   $ 0
Transfer of equity in business combinations (in shares) 394   394 1
Transfer of equity in business combinations $ 0   $ 0 $ 0
Balances, end of period (in shares) 8,240 1,887 8,240 1,887
Balance, end of period $ 8 $ 3 $ 8 $ 3
Common Stock | Class A Common Stock | Share Repurchases from Current and Former xAI Employees        
Common Stock        
Repurchase of common stock (in shares)     (3)  
Repurchase of common stock     $ 0  
Common Stock | Class A Common Stock | Share Repurchases from Existing Shareholders        
Common Stock        
Repurchase of common stock (in shares)     (10)  
Repurchase of common stock     $ 0  
Common Stock | Class A Common Stock | Conversion of redeemable convertible preferred stock pursuant to xAI Merger        
Common Stock        
Conversion of stock (in shares)     886  
Conversion of stock     $ 0  
Common Stock | Class A Common Stock | Conversion of redeemable convertible preferred stock to common stock        
Common Stock        
Conversion of stock (in shares)     3,453 1
Conversion of stock     $ 3 $ 0
Common Stock | Class A Common Stock | Conversion between classes of common stock        
Common Stock        
Conversion of stock (in shares) 230   867 49
Conversion of stock $ 1   $ 1 $ 0
Common Stock | Class A Common Stock | IPO        
Common Stock        
Common stock issued, net (in shares)     639  
Common stock issued, net     $ 1  
Common Stock | Class A Common Stock | Issuances Excluding IPO        
Common Stock        
Common stock issued, net (in shares) 9   62  
Common stock issued, net $ 0   $ 0  
Common Stock | Class B Common Stock        
Common Stock        
Balances, beginning of period (in shares) 5,569 728 643 768
Balance, beginning of period $ 6 $ 1 $ 1 $ 1
Common stock issued, net (in shares)   2   3
Common stock issued, net   $ 0   $ 0
Conversion of stock (in shares)   (23)    
Conversion of stock   $ 0    
Repurchase of common stock (in shares)   (13)   (28)
Repurchase of common stock   $ 0   $ 0
Transfer of equity in business combinations (in shares) 0   0 0
Transfer of equity in business combinations $ 0   $ 0 $ 0
Balances, end of period (in shares) 5,339 694 5,339 694
Balance, end of period $ 5 $ 1 $ 5 $ 1
Common Stock | Class B Common Stock | Share Repurchases from Current and Former xAI Employees        
Common Stock        
Repurchase of common stock (in shares)     (20)  
Repurchase of common stock     $ 0  
Common Stock | Class B Common Stock | Share Repurchases from Existing Shareholders        
Common Stock        
Repurchase of common stock (in shares)     (31)  
Repurchase of common stock     $ 0  
Common Stock | Class B Common Stock | Conversion of redeemable convertible preferred stock pursuant to xAI Merger        
Common Stock        
Conversion of stock (in shares)     537  
Conversion of stock     $ 1  
Common Stock | Class B Common Stock | Conversion of redeemable convertible preferred stock to common stock        
Common Stock        
Conversion of stock (in shares)     3,274 0
Conversion of stock     $ 3 $ 0
Common Stock | Class B Common Stock | Conversion between classes of common stock        
Common Stock        
Conversion of stock (in shares) (230)   (370) (49)
Conversion of stock $ (1)   $ (1) $ 0
Common Stock | Class B Common Stock | IPO        
Common Stock        
Common stock issued, net (in shares)     0  
Common stock issued, net     $ 0  
Common Stock | Class B Common Stock | Issuances Excluding IPO        
Common Stock        
Common stock issued, net (in shares) 0   1,306  
Common stock issued, net $ 0   $ 1  
Common Stock | Class C Common Stock        
Common Stock        
Balances, beginning of period (in shares) 0 453 484 423
Balance, beginning of period $ 0 $ 0 $ 0 $ 0
Common stock issued, net (in shares)   7   36
Common stock issued, net   $ 0   $ 0
Conversion of stock (in shares)   0    
Conversion of stock   $ 0    
Repurchase of common stock (in shares)   0   0
Repurchase of common stock   $ 0   $ 0
Transfer of equity in business combinations (in shares) 0   0 0
Transfer of equity in business combinations $ 0   $ 0 $ 0
Balances, end of period (in shares) 0 460 0 460
Balance, end of period $ 0 $ 0 $ 0 $ 0
Common Stock | Class C Common Stock | Share Repurchases from Current and Former xAI Employees        
Common Stock        
Repurchase of common stock (in shares)     0  
Repurchase of common stock     $ 0  
Common Stock | Class C Common Stock | Share Repurchases from Existing Shareholders        
Common Stock        
Repurchase of common stock (in shares)     0  
Repurchase of common stock     $ 0  
Common Stock | Class C Common Stock | Conversion of redeemable convertible preferred stock pursuant to xAI Merger        
Common Stock        
Conversion of stock (in shares)     0  
Conversion of stock     $ 0  
Common Stock | Class C Common Stock | Conversion of redeemable convertible preferred stock to common stock        
Common Stock        
Conversion of stock (in shares)     0 1
Conversion of stock     $ 0 $ 0
Common Stock | Class C Common Stock | Conversion between classes of common stock        
Common Stock        
Conversion of stock (in shares) 0   (497) 0
Conversion of stock $ 0   $ 0 $ 0
Common Stock | Class C Common Stock | IPO        
Common Stock        
Common stock issued, net (in shares)     0  
Common stock issued, net     $ 0  
Common Stock | Class C Common Stock | Issuances Excluding IPO        
Common Stock        
Common stock issued, net (in shares) 0   13  
Common stock issued, net $ 0   $ 0  
Common Stock | Class D Common Stock        
Common Stock        
Balances, beginning of period (in shares)   0 0 0
Balance, beginning of period   $ 0 $ 0 $ 0
Common stock issued, net (in shares)   0   0
Common stock issued, net   $ 0   $ 0
Conversion of stock (in shares)   0    
Conversion of stock   $ 0    
Repurchase of common stock (in shares)   0   0
Repurchase of common stock   $ 0   $ 0
Transfer of equity in business combinations (in shares)     0 0
Transfer of equity in business combinations     $ 0 $ 0
Balances, end of period (in shares) 0 0 0 0
Balance, end of period $ 0 $ 0 $ 0 $ 0
Common Stock | Class D Common Stock | Share Repurchases from Current and Former xAI Employees        
Common Stock        
Repurchase of common stock (in shares)     0  
Repurchase of common stock     $ 0  
Common Stock | Class D Common Stock | Share Repurchases from Existing Shareholders        
Common Stock        
Repurchase of common stock (in shares)     0  
Repurchase of common stock     $ 0  
Common Stock | Class D Common Stock | Conversion of redeemable convertible preferred stock pursuant to xAI Merger        
Common Stock        
Conversion of stock (in shares)     0  
Conversion of stock     $ 0  
Common Stock | Class D Common Stock | Conversion of redeemable convertible preferred stock to common stock        
Common Stock        
Conversion of stock (in shares)     0 0
Conversion of stock     $ 0 $ 0
Common Stock | Class D Common Stock | Conversion between classes of common stock        
Common Stock        
Conversion of stock (in shares)     0 0
Conversion of stock     $ 0 $ 0
Common Stock | Class D Common Stock | IPO        
Common Stock        
Common stock issued, net (in shares)     0  
Common stock issued, net     $ 0  
Common Stock | Class D Common Stock | Issuances Excluding IPO        
Common Stock        
Common stock issued, net (in shares)     0  
Common stock issued, net     $ 0