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Equity - Changes in Number of Shares Outstanding (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issue of shares upon vesting of restricted stock units (in shares) 850 1,553 867
Issue of shares on exercises of stock options (in shares) 438    
Common Stock | Class A Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of year (in shares) 723,999 650,065  
Issue of shares for employee stock purchase plan (in shares) 2,510 4,378  
Exchange of Class B common stock for Class A common stock (in shares) 194,885 65,995  
Repurchase and cancellation of Class A common stock (in shares) (17,628) 0  
Balance at end of year (in shares) 909,142 723,999 650,065
Common Stock | Class A Common Stock | RSUs      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issue of shares upon vesting of restricted stock units (in shares) 4,968 3,548  
Common Stock | Class A Common Stock | Options      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issue of shares on exercises of stock options (in shares) 408 13  
Common Stock | Class B Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Balance at beginning of year (in shares) 311,433 377,428  
Issue of shares for employee stock purchase plan (in shares) 0 0  
Exchange of Class B common stock for Class A common stock (in shares) (194,885) (65,995)  
Repurchase and cancellation of Class A common stock (in shares) 0 0  
Balance at end of year (in shares) 116,548 311,433 377,428
Common Stock | Class B Common Stock | RSUs      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issue of shares upon vesting of restricted stock units (in shares) 0 0  
Common Stock | Class B Common Stock | Options      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issue of shares on exercises of stock options (in shares) 0 0