Preferred Stock and Common stock - Schedule of Stock by Class (Detail) - shares	Sep. 30, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Shares authorized (in shares)	13,850,000,000	13,850,000,000
Shares issued (in shares)	477,843,818	438,098,194
Shares outstanding (in shares)	477,843,818	438,098,194
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)	458,904,462	419,842,991
Shares outstanding (in shares)	458,904,462	419,842,991
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)	18,939,356	18,255,203
Shares outstanding (in shares)	18,939,356	18,255,203