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Share-Based Compensation - Stock Option Activity (Details)
shares in Thousands, $ in Millions
 6 Months Ended
Jun. 30, 2022
$ / shares
shares
Jun. 30, 2022
USD ($)
shares
Number of Shares    
Options outstanding (in shares) | shares 14,731  
Options, granted (in shares) | shares 5,402  
Options, exercised (in shares) | shares (339)  
Options, forfeited (in shares) | shares (333)  
Options, expired (in shares) | shares (178)  
Options outstanding (in shares) | shares 19,283  
Options, vested and unvested expected to vest (in shares) | shares   17,589
Options, exercisable (in shares) | shares   10,377
Weighted Average Exercise  Price    
Options outstanding (in dollars per share) | $ / shares $ 11.08  
Options, granted (in dollars per share) | $ / shares 11.55  
Options, exercised (in dollars per share) | $ / shares 5.60  
Options, forfeited (in dollars per share) | $ / shares 12.36  
Options, expired (in dollars per share) | $ / shares 11.98  
Options outstanding (in dollars per share) | $ / shares 11.28  
Options, vested and unvested expected to vest (in dollars per share) | $ / shares 11.18  
Options, exercisable (in dollars per share) | $ / shares $ 10.38  
Additional Disclosures    
Weighted average remaining contractual life, options outstanding 7 years  
Weighted average remaining contractual life, options vested and unvested expected to vest 6 years 9 months 18 days  
Weighted average remaining contractual life, options exercisable 5 years 2 months 12 days  
Aggregate intrinsic value, options outstanding | $   $ 22.2
Aggregate intrinsic value, vested and unvested expected to vest | $   21.5
Aggregate intrinsic value, exercisable | $   $ 18.3