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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Treasury Stock
Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2019     $ 1,593.9 $ (288.3) $ (8.9) $ (32.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise or redemption of share-based awards     0.0      
Stock-based compensation expense     2.5      
Net (loss) income $ 3.7     3.7    
Purchases of treasury stock         0.0  
Other comprehensive loss, net of tax           (14.9)
Ending balance at Mar. 31, 2020 1,256.5 $ 0.5 1,596.4 (284.6) (8.9) (46.9)
Beginning balance at Dec. 31, 2020 1,256.5   1,609.4 (315.5) (9.8) (28.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise or redemption of share-based awards     4.8      
Stock-based compensation expense     3.1      
Net (loss) income (7.6)     (7.6)    
Purchases of treasury stock         0.0  
Other comprehensive loss, net of tax           (4.2)
Ending balance at Mar. 31, 2021 $ 1,252.6 $ 0.5 $ 1,617.3 $ (323.1) $ (9.8) $ (32.3)