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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($)
$ in Millions
Total
Common Stock
Common Stock
Restricted Shares
Common Stock
RSUs
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021   616,026,565          
Beginning balance at Dec. 31, 2021 $ 2,248 $ 0     $ 3,955 $ (1,705) $ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Vesting of restricted stock and restricted stock units (in shares)   142,129   8,543,024      
Exercise of stock options (in shares)   2,321,415          
Exercise of stock options 3       3    
Stock-based compensation 134       134    
Other comprehensive income (loss) (3)           (3)
Net income (loss) (26)         (26)  
Ending balance (in shares) at Jun. 30, 2022   627,033,133          
Ending balance at Jun. 30, 2022 2,356 $ 0     4,092 (1,731) (5)
Beginning balance (in shares) at Mar. 31, 2022   622,918,512          
Beginning balance at Mar. 31, 2022 2,347 $ 0     4,028 (1,677) (4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Vesting of restricted stock and restricted stock units (in shares)     69,211 3,619,795      
Exercise of stock options (in shares)   425,615          
Exercise of stock options 1       1    
Stock-based compensation 63       63    
Other comprehensive income (loss) (1)           (1)
Net income (loss) (54)         (54)  
Ending balance (in shares) at Jun. 30, 2022   627,033,133          
Ending balance at Jun. 30, 2022 $ 2,356 $ 0     4,092 (1,731) (5)
Beginning balance (in shares) at Dec. 31, 2022 637,387,025 637,387,025          
Beginning balance at Dec. 31, 2022 $ 1,086 $ 0     4,148 (3,058) (4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Vesting of restricted stock and restricted stock units (in shares)       17,136,256      
Exercise of stock options (in shares) 2,170,000 2,169,854          
Exercise of stock options $ 2       2    
Employee stock purchase plan (in shares)   644,431          
Employee stock purchase plan 1       1    
Stock-based compensation 73       73    
Other comprehensive income (loss) 2           2
Net income (loss) $ (78)         (78)  
Ending balance (in shares) at Jun. 30, 2023 657,337,566 657,337,566          
Ending balance at Jun. 30, 2023 $ 1,086 $ 0     4,224 (3,136) (2)
Beginning balance (in shares) at Mar. 31, 2023   647,607,920          
Beginning balance at Mar. 31, 2023 1,036 $ 0     4,198 (3,159) (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Vesting of restricted stock and restricted stock units (in shares)       8,894,761      
Exercise of stock options (in shares)   834,885          
Exercise of stock options 1       1    
Employee stock purchase plan (in shares)   0          
Employee stock purchase plan 0       0    
Stock-based compensation 25       25    
Other comprehensive income (loss) 1           1
Net income (loss) $ 23         23  
Ending balance (in shares) at Jun. 30, 2023 657,337,566 657,337,566          
Ending balance at Jun. 30, 2023 $ 1,086 $ 0     $ 4,224 $ (3,136) $ (2)