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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Millions
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2019     92,300,000          
Beginning balance at Dec. 31, 2019 $ 636.9   $ 0.1 $ 1,768.1   $ 1.4 $ (1,132.7)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 407.3           407.3  
Other comprehensive income (loss), net of tax 0.4         0.4    
Stock-based compensation expense 100.0     100.0        
Equity component of repurchased convertible senior notes, net (47.5)     (47.5)        
Issuances of common stock under stock plans (in shares)     1,200,000          
Issuances of common stock under stock plans 29.1     29.1        
Ending balance (in shares) at Dec. 31, 2020     93,500,000          
Ending balance at Dec. 31, 2020 1,126.2   $ 0.1 1,849.7   1.8 (725.4)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 89.6           89.6  
Other comprehensive income (loss), net of tax $ (3.5)         (3.5)    
Accounting Standards Update [Extensible List] Accounting Standards Update 2020-06              
Stock-based compensation expense $ 134.2     134.2        
Issuances of common stock under stock plans (in shares)     1,400,000          
Issuances of common stock under stock plans 27.5     27.5        
Ending balance (in shares) at Dec. 31, 2021     94,900,000          
Ending balance at Dec. 31, 2021 1,374.0 $ (32.3) $ 0.1 2,011.4 $ (106.8) (1.7) (635.8) $ 74.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 154.5           154.5  
Other comprehensive income (loss), net of tax (6.2)         (6.2)    
Stock-based compensation expense 173.1     173.1        
Issuances of common stock under stock plans (in shares)     1,600,000          
Issuances of common stock under stock plans 44.7     44.7        
Ending balance (in shares) at Dec. 31, 2022     96,500,000          
Ending balance at Dec. 31, 2022 $ 1,707.8   $ 0.1 $ 2,122.4   $ (7.9) $ (406.8)