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Condensed Consolidated Statements of Stockholders' Deficit - USD ($)
shares in Millions, $ in Millions
Total
Class A and Class B Common Stock
Additional paid in capital
Accumulated deficit
Accumulated other comprehensive income
Shares outstanding, beginning of the period (in shares) at Dec. 31, 2020   405.7      
Shareholders equity, beginning balance at Dec. 31, 2020 $ 333.8 $ 0.0 $ 2,564.3 $ (2,241.4) $ 10.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Release of restricted stock units and awards (in shares)   3.8      
Shares withheld related to net share settlement of restricted stock units and awards (in shares)   (1.5)      
Shares withheld related to net share settlement of restricted stock units and awards (35.8)   (11.2) (24.6)  
Repurchases of common stock (in shares)   (18.6)      
Repurchases of common stock (431.9)   (142.5) (289.4)  
Exercise of stock options and awards (in shares)   0.4      
Exercise of stock options and awards 2.9   2.9    
Assumed stock options in connection with acquisition 1.2   1.2    
Purchase of bond hedges in connection with issuance of convertible senior notes (265.3)   (265.3)    
Sale of warrants in connection with issuance of convertible senior notes 202.9   202.9    
Tax benefit attributable to bond hedges purchased in connection with issuance of convertible senior notes 0.0        
Stock-based compensation 67.9   67.9    
Other comprehensive loss (6.3)       (6.3)
Net income 47.6     47.6  
Shares outstanding, end of the period (in shares) at Mar. 31, 2021   389.8      
Shareholders equity, ending balance at Mar. 31, 2021 (83.0) $ 0.0 2,420.2 (2,507.8) 4.6
Shares outstanding, beginning of the period (in shares) at Dec. 31, 2021   375.5      
Shareholders equity, beginning balance at Dec. 31, 2021 $ (293.9) $ 0.0 2,448.1 (2,739.4) (2.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Release of restricted stock units and awards (in shares)   3.9      
Shares withheld related to net share settlement of restricted stock units and awards (in shares) (1.5) (1.5)      
Shares withheld related to net share settlement of restricted stock units and awards $ (36.7)   (12.2) (24.5)  
Repurchases of common stock (in shares)   (11.0)      
Repurchases of common stock $ (259.9)   (89.2) (170.7)  
Exercise of stock options and awards (in shares) 0.1 0.1      
Exercise of stock options and awards $ 0.2   0.2    
Assumed stock options in connection with acquisition 0.0        
Purchase of bond hedges in connection with issuance of convertible senior notes 0.0        
Sale of warrants in connection with issuance of convertible senior notes 0.0        
Tax benefit attributable to bond hedges purchased in connection with issuance of convertible senior notes 0.5   0.5    
Stock-based compensation 72.3   72.3    
Other comprehensive loss (25.5)       (25.5)
Net income 79.7     79.7  
Shares outstanding, end of the period (in shares) at Mar. 31, 2022   367.0      
Shareholders equity, ending balance at Mar. 31, 2022 $ (463.3) $ 0.0 $ 2,419.7 $ (2,854.9) $ (28.1)