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Equity (Tables)
 12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
Rollforward of Common Stock
A summary of the outstanding shares of common stock is as follows:
Balance as of January 1, 2020763,484,915 
Exercise of stock options342,700 
Issuance of restricted stock17,512 
Forfeiture of unvested restricted stock(2,189)
Balance as of December 31, 2020763,842,938 
Exercise of stock options121,710 
Issuance of restricted stock25,104 
Balance as of December 31, 2021763,989,752 
Issuance of restricted stock46,448 
Vesting of restricted stock units211,083 
Balance as of December 31, 2022764,247,283