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Stockholders' Equity and Noncontrolling Interests - Narrative (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended
Feb. 28, 2025
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Class of Stock [Line Items]        
Preferred stock shares authorized (in shares)   2,000,000,000.0   2,000,000,000.0
Common stock shares authorized (in shares)   5,000,000,000.0   5,000,000,000.0
Preferred stock shares issued (in shares)   0   0
Preferred stock shares outstanding (in shares)   0   0
Common stock shares issued (in shares)   966,000,000   995,000,000
Common stock shares outstanding (in shares)   966,000,000   995,000,000
Cash dividends paid on common stock   $ 116 $ 139  
Purchase of common stock   2,012 331  
Cruise Preferred Shares        
Class of Stock [Line Items]        
Increase in equity due to preferred stock redemption   538    
GM Cruise Holdings LLC        
Class of Stock [Line Items]        
Net income attributable to shareholders and transfers to the noncontrolling interests   3,300    
Common Stock Repurchase Program        
Class of Stock [Line Items]        
Increased capacity under common stock repurchase plan $ 6,000      
Capacity under common stock repurchase plan 6,300      
Purchase of common stock     $ 331  
Reduction in additional paid in capital   $ 400    
Shares repurchased and retired during period     8,000,000  
Accelerated Share Repurchase        
Class of Stock [Line Items]        
Capacity under common stock repurchase plan 2,000      
Amount advanced during period $ 2,000      
Common stock shares repurchased during period 33,000,000      
Purchase of common stock $ 1,600