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Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($)
$ in Millions
Total
Common stock
Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit
Beginning balance at Dec. 31, 2022 $ 885.8 $ 0.8 $ 1,260.1 $ (8.9) $ (366.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock under stock-based compensation plans, net of shares exchanged for withholding tax (4.9)   (4.9)    
Stock-based compensation expense 7.5   7.5    
Net loss (54.7)       (54.7)
Other comprehensive income (loss), net of tax 1.5     1.5  
Ending balance at Mar. 31, 2023 835.2 0.8 1,262.7 (7.4) (420.9)
Beginning balance at Dec. 31, 2022 885.8 0.8 1,260.1 (8.9) (366.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net loss (232.1)        
Ending balance at Sep. 30, 2023 683.4 0.8 1,286.2 (5.3) (598.3)
Beginning balance at Mar. 31, 2023 835.2 0.8 1,262.7 (7.4) (420.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock under stock-based compensation plans, net of shares exchanged for withholding tax 2.9   2.9    
Stock-based compensation expense 11.2   11.2    
Net loss (116.1)       (116.1)
Other comprehensive income (loss), net of tax 2.0     2.0  
Ending balance at Jun. 30, 2023 735.2 0.8 1,276.8 (5.4) (537.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock under stock-based compensation plans, net of shares exchanged for withholding tax (2.2)   (2.2)    
Stock-based compensation expense 11.6   11.6    
Net loss (61.3)       (61.3)
Other comprehensive income (loss), net of tax 0.1     0.1  
Ending balance at Sep. 30, 2023 683.4 0.8 1,286.2 (5.3) (598.3)
Beginning balance at Dec. 31, 2023 783.2 0.9 1,415.5 (3.7) (629.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock under stock-based compensation plans, net of shares exchanged for withholding tax (8.7)   (8.7)    
Stock-based compensation expense 12.0   12.0    
Net loss (26.0)       (26.0)
Other comprehensive income (loss), net of tax (0.5)     (0.5)  
Ending balance at Mar. 31, 2024 760.0 0.9 1,418.8 (4.2) (655.5)
Beginning balance at Dec. 31, 2023 783.2 0.9 1,415.5 (3.7) (629.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net loss (84.8)        
Ending balance at Sep. 30, 2024 731.7 0.9 1,445.2 (0.1) (714.3)
Beginning balance at Mar. 31, 2024 760.0 0.9 1,418.8 (4.2) (655.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock under stock-based compensation plans, net of shares exchanged for withholding tax 2.5   2.5    
Stock-based compensation expense 14.5   14.5    
Net loss (36.7)       (36.7)
Other comprehensive income (loss), net of tax 0.2     0.2  
Ending balance at Jun. 30, 2024 740.5 0.9 1,435.8 (4.0) (692.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock under stock-based compensation plans, net of shares exchanged for withholding tax (3.0)   (3.0)    
Stock-based compensation expense 12.4   12.4    
Net loss (22.1)       (22.1)
Other comprehensive income (loss), net of tax 3.9     3.9  
Ending balance at Sep. 30, 2024 $ 731.7 $ 0.9 $ 1,445.2 $ (0.1) $ (714.3)