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Stockholders' Equity and Noncontrolling Interests - Preferred and Common Stock (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 01, 2023
USD ($)
shares
Mar. 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
vote
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
shares
Nov. 30, 2023
USD ($)
Class of Stock [Line Items]              
Preferred stock shares authorized (in shares) | shares       2,000,000,000      
Common stock shares authorized (in shares) | shares       5,000,000,000      
Preferred stock shares outstanding (in shares) | shares       0 0    
Common stock number of shares issued (in shares) | shares       1,200,000,000 1,400,000,000    
Common stock shares outstanding (in shares) | shares       1,200,000,000 1,400,000,000    
Dividends declared per common share (in dollars per share) | $ / shares       $ 0.36 $ 0.18    
Cash dividends paid on common stock       $ 477 $ 257    
Number of votes per share | vote       1      
Common shares purchased during period (in shares) | shares           0  
Amount of common stock purchased during period       $ 11,115 2,500    
Cruise Stock Incentive Awards              
Class of Stock [Line Items]              
Cash used to settle awards     $ 0 $ 300 $ 600    
Common Stock Repurchase Program              
Class of Stock [Line Items]              
Increased capacity under common stock repurchase plan             $ 10,000
Remaining authorized repurchase amount             $ 11,400
Common shares purchased during period (in shares) | shares 215,000,000     245,000,000 64,000,000    
Amount of common stock purchased during period $ 6,800     $ 7,900 $ 2,500    
Reduction in additional paid in capital       3,200      
Common Class B              
Class of Stock [Line Items]              
Recorded value of vested awards       42 60    
Common Class B | Cruise Stock Incentive Awards              
Class of Stock [Line Items]              
Cash used to settle awards       300 600    
Cruise Preferred Shares              
Class of Stock [Line Items]              
Decrease in equity due to preferred stock redemption         700    
GM Cruise              
Class of Stock [Line Items]              
Net income attributable to shareholders and transfers to the noncontrolling interests       10,300 9,200    
GM Cruise | Series G Preferred Shares | Microsoft and other investors              
Class of Stock [Line Items]              
Proceeds from sale of stock           $ 2,700  
GM Cruise | Series G Preferred Shares | General Motors Holdings LLC              
Class of Stock [Line Items]              
Proceeds from sale of stock           $ 1,000  
GM Cruise | Cruise Class A-1, Class F and Class G Preferred Shares | SoftBank              
Class of Stock [Line Items]              
Payments for repurchase of equity   $ 2,100          
GM Cruise | Common Class B              
Class of Stock [Line Items]              
Amount of stock issued during period       400 800    
Payments for statutory tax withholdings       $ 200 $ 500    
GM Cruise              
Class of Stock [Line Items]              
Payments to acquire additional investment   $ 1,350