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Preferred Stock and Common Stock - Schedule of Stock by Class (Detail) - shares
Sep. 30, 2024
Dec. 31, 2023
Class of Stock [Line Items]    
Shares authorized (in shares) 13,850,000,000 13,850,000,000
Shares issued (in shares) 507,581,054 484,893,266
Shares outstanding (in shares) 507,581,054 484,893,266
Class A common stock    
Class of Stock [Line Items]    
Shares authorized (in shares) 12,500,000,000 12,500,000,000
Shares issued (in shares) 491,822,267 465,633,122
Shares outstanding (in shares) 491,822,267 465,633,122
Class B common stock    
Class of Stock [Line Items]    
Shares authorized (in shares) 1,250,000,000 1,250,000,000
Shares issued (in shares) 0 0
Shares outstanding (in shares) 0 0
Class C common stock    
Class of Stock [Line Items]    
Shares authorized (in shares) 100,000,000 100,000,000
Shares issued (in shares) 15,758,787 19,260,144
Shares outstanding (in shares) 15,758,787 19,260,144