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Share based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Shares      
Balance at the beginning of the period (in shares) 14,731 14,032 16,724
Options, Granted (in shares) 5,733 3,262 4,362
Options, Exercised (in shares) (660) (1,483) (5,243)
Options, Forfeited (in shares) (495) (844) (1,376)
Options, Expired (in shares) (245) (236) (435)
Balance at the end of the period (in shares) 19,064 14,731 14,032
Vested and unvested expected to vest as of the end of the period (in shares) 17,492    
Exercisable at the end of the period (in shares) 10,938    
Weighted Average Exercise Price      
Balance at the beginning of the period (in dollars per share) $ 11.08 $ 9.54 $ 9.15
Options, Granted (in dollars per share) 11.53 16.53 9.98
Options, Exercised (in dollars per share) 6.58 7.05 8.11
Options, Forfeited (in dollars per share) 12.57 12.97 10.42
Options, Expired (in dollars per share) 12.84 13.28 13.33
Balance at the end of the period (in dollars per share) 11.31 $ 11.08 $ 9.54
Vested and unvested expected to vest as of the end of the period (in dollars per share) 11.22    
Exercisable at the end of the period (in dollars per share) $ 10.59    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Balance at the end of the period 6 years 7 months 6 days    
Vested and unvested expected to vest at the end of the period 6 years 4 months 24 days    
Exercisable at the end of the period 5 years    
Aggregate intrinsic value of options outstanding $ 36.7    
Aggregate intrinsic value of options vested and unvested expected to vest 35.1    
Aggregate intrinsic value of options exercisable $ 29.0