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Stockholders’ Deficit - Schedule of Stock Option and Restricted Stock Activity (Details)
$ / shares in Units, shares in Millions, $ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Number of shares available for issuance under the Plans    
Beginning balance (in shares) 97.9  
Additional shares authorized (in shares) 17.5  
Options and restricted stock units and awards canceled (in shares) 10.0  
Shares withheld related to net share settlement of restricted stock units and awards (in shares) 4.1  
Options and restricted stock units and awards granted (in shares) (20.4)  
Ending balance (in shares) 109.1 97.9
Options Outstanding, Number of shares outstanding under the Plans    
Beginning balance (in shares) 0.4  
Options exercised and restricted stock units and awards released (in shares) (0.2)  
Ending balance (in shares) 0.2 0.4
Vested at end of period (in shares) 0.2  
Unvested at end of period (in shares) 0.0  
Options Outstanding, Weighted- average exercise price per share    
Beginning balance (in dollars per share) | $ / shares $ 11.30  
Options exercised and restricted stock units and awards released (in dollars per share) | $ / shares 10.59  
Ending balance (in dollars per share) | $ / shares 12.73 $ 11.30
Vested at end of period (in dollars per share) | $ / shares 12.73  
Unvested at end of period (in dollars per share) | $ / shares $ 0  
Options Outstanding, Weighted- average remaining contractual term (In years)    
Weighted-average contractual term 4 years 2 months 12 days 4 years 6 months
Vested at end of period 4 years 2 months 12 days  
Options outstanding, aggregate intrinsic value | $ $ 2.2 $ 4.5
Vested at end of period, aggregate intrinsic value | $ 2.2  
Unvested at end of period, aggregate intrinsic value | $ $ 0.0  
Restricted Stock    
Restricted Stock Outstanding, Number of shares outstanding under the Plans    
Beginning balance (in shares) 34.8  
Options exercised and restricted stock units and awards released (in shares) (11.5)  
Options and restricted stock units and awards canceled (in shares) (10.0)  
Options and restricted stock units and awards granted (in shares) 20.4  
Ending balance (in shares) 33.7 34.8
Vested at end of period (in shares) 0.0  
Restricted Stock Outstanding, Weighted- average grant date fair value per share    
Beginning balance (in dollars per share) | $ / shares $ 23.40  
Options exercised and restricted stock units and awards released (in dollars per share) | $ / shares 22.76  
Options and restricted stock units and awards canceled (in dollars per share) | $ / shares 22.25  
Options and restricted stock units and awards granted (in dollars per share) | $ / shares 22.23  
Ending balance (in dollars per share) | $ / shares 22.89 $ 23.40
Vested at end of period (in dollars per share) | $ / shares $ 0