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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income
Accumulated Deficit
Treasury Stock, at Cost
Beginning balance (in shares) at Dec. 31, 2021   211.2        
Beginning balance at Dec. 31, 2021 $ 1,327.4 $ 2.1 $ 2,500.0 $ 6.9 $ (1,181.6) $ 0.0
Beginning balance (in shares) at Dec. 31, 2021           0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of stock options and release of stock awards (in shares)   1.6        
Exercise of stock options and release of stock awards 0.5   0.5      
Share-based compensation expense 17.0   17.0      
Net loss (38.5)       (38.5)  
Other comprehensive income (loss) 42.0     42.0    
Repurchase of common stock (in shares)           0.4
Repurchase of common stock (4.1)         $ (4.1)
Ending balance (in shares) at Mar. 31, 2022   212.8        
Ending balance at Mar. 31, 2022 $ 1,344.3 $ 2.1 2,517.5 48.9 (1,220.1) $ (4.1)
Ending balance (in shares) at Mar. 31, 2022           0.4
Beginning balance (in shares) at Dec. 31, 2022 212.6 215.7        
Beginning balance at Dec. 31, 2022 $ 629.5 $ 2.2 2,573.3 71.4 (1,986.4) $ (31.0)
Beginning balance (in shares) at Dec. 31, 2022 3.1         3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of stock options and release of stock awards (in shares)   2.4        
Exercise of stock options and release of stock awards $ 0.0   0.0      
Share-based compensation expense 14.7   14.7      
Net loss (612.0)       (612.0)  
Other comprehensive income (loss) $ (7.8)     (7.8)    
Ending balance (in shares) at Mar. 31, 2023 215.0 218.1        
Ending balance at Mar. 31, 2023 $ 24.4 $ 2.2 $ 2,588.0 $ 63.6 $ (2,598.4) $ (31.0)
Ending balance (in shares) at Mar. 31, 2023 3.1         3.1