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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Millions
Total
$0.001 Par Value Common Stock
Treasury Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Beginning balance (in shares) at Dec. 31, 2021   55,100,000        
Beginning balance at Dec. 31, 2021 $ 1,611.5 $ 0.1 $ (152.2) $ 829.4 $ (16.1) $ 950.3
Beginning balance (in shares) at Dec. 31, 2021     (3,800,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (4.6)         (4.6)
Share-based compensation activity (in shares)   200,000        
Share-based compensation activity 5.4     5.4    
Repurchases of stock (in shares)     (1,100,000)      
Repurchases of common stock (52.2)   $ (52.2)      
Other comprehensive income (loss), net of tax 6.8       6.8  
Ending balance (in shares) at Mar. 31, 2022   55,300,000        
Ending balance at Mar. 31, 2022 1,566.9 $ 0.1 $ (204.4) 834.8 (9.3) 945.7
Ending balance (in shares) at Mar. 31, 2022     (4,900,000)      
Beginning balance (in shares) at Dec. 31, 2021   55,100,000        
Beginning balance at Dec. 31, 2021 1,611.5 $ 0.1 $ (152.2) 829.4 (16.1) 950.3
Beginning balance (in shares) at Dec. 31, 2021     (3,800,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (144.6)          
Repurchases of stock (in shares)     (1,800,000)      
Repurchases of common stock     $ (75.5)      
Other comprehensive income (loss), net of tax $ 10.9          
Ending balance (in shares) at Sep. 30, 2022 55,500,000 55,500,000        
Ending balance at Sep. 30, 2022 $ 1,433.0 $ 0.1 $ (227.7) 860.1 (5.2) 805.7
Ending balance (in shares) at Sep. 30, 2022 (5,600,000)   (5,600,000)      
Beginning balance (in shares) at Mar. 31, 2022   55,300,000        
Beginning balance at Mar. 31, 2022 $ 1,566.9 $ 0.1 $ (204.4) 834.8 (9.3) 945.7
Beginning balance (in shares) at Mar. 31, 2022     (4,900,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (52.9)         (52.9)
Share-based compensation activity (in shares)   200,000        
Share-based compensation activity 14.4     14.4    
Repurchases of stock (in shares)     (700,000)      
Repurchases of common stock (23.3)   $ (23.3)      
Other comprehensive income (loss), net of tax 3.2       3.2  
Ending balance (in shares) at Jun. 30, 2022   55,500,000        
Ending balance at Jun. 30, 2022 1,508.3 $ 0.1 $ (227.7) 849.2 (6.1) 892.8
Ending balance (in shares) at Jun. 30, 2022     (5,600,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (87.1)         (87.1)
Share-based compensation activity 10.9     10.9    
Repurchases of stock (in shares)     0      
Other comprehensive income (loss), net of tax $ 0.9       0.9  
Ending balance (in shares) at Sep. 30, 2022 55,500,000 55,500,000        
Ending balance at Sep. 30, 2022 $ 1,433.0 $ 0.1 $ (227.7) 860.1 (5.2) 805.7
Ending balance (in shares) at Sep. 30, 2022 (5,600,000)   (5,600,000)      
Beginning balance (in shares) at Dec. 31, 2022 55,700,000 55,700,000        
Beginning balance at Dec. 31, 2022 $ 1,387.7 $ 0.1 $ (227.7) 873.5 3.1 738.7
Beginning balance (in shares) at Dec. 31, 2022 (5,600,000)   (5,600,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss $ (186.2)         (186.2)
Share-based compensation activity (in shares)   300,000        
Share-based compensation activity 4.7     4.7    
Other comprehensive income (loss), net of tax (2.1)       (2.1)  
Ending balance (in shares) at Mar. 31, 2023   56,000,000.0        
Ending balance at Mar. 31, 2023 $ 1,204.1 $ 0.1 $ (227.7) 878.2 1.0 552.5
Ending balance (in shares) at Mar. 31, 2023     (5,600,000)      
Beginning balance (in shares) at Dec. 31, 2022 55,700,000 55,700,000        
Beginning balance at Dec. 31, 2022 $ 1,387.7 $ 0.1 $ (227.7) 873.5 3.1 738.7
Beginning balance (in shares) at Dec. 31, 2022 (5,600,000)   (5,600,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss $ (711.0)          
Other comprehensive income (loss), net of tax $ (5.7)          
Ending balance (in shares) at Sep. 30, 2023 57,400,000 57,400,000        
Ending balance at Sep. 30, 2023 $ 697.2 $ 0.1 $ (227.7) 899.7 (2.6) 27.7
Ending balance (in shares) at Sep. 30, 2023 (5,600,000)   (5,600,000)      
Beginning balance (in shares) at Mar. 31, 2023   56,000,000.0        
Beginning balance at Mar. 31, 2023 $ 1,204.1 $ 0.1 $ (227.7) 878.2 1.0 552.5
Beginning balance (in shares) at Mar. 31, 2023     (5,600,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (261.4)         (261.4)
Share-based compensation activity (in shares)   300,000        
Share-based compensation activity 9.4     9.4    
At-the-market sale of stock, net of commissions and expenses (in shares)   1,100,000        
At-the-market sale of stock, net of commissions and expenses 8.2     8.2    
Other comprehensive income (loss), net of tax (2.6)       (2.6)  
Ending balance (in shares) at Jun. 30, 2023   57,400,000        
Ending balance at Jun. 30, 2023 957.7 $ 0.1 $ (227.7) 895.8 (1.6) 291.1
Ending balance (in shares) at Jun. 30, 2023     (5,600,000)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (263.4)         (263.4)
Share-based compensation activity 3.9     3.9    
Other comprehensive income (loss), net of tax $ (1.0)       (1.0)  
Ending balance (in shares) at Sep. 30, 2023 57,400,000 57,400,000        
Ending balance at Sep. 30, 2023 $ 697.2 $ 0.1 $ (227.7) $ 899.7 $ (2.6) $ 27.7
Ending balance (in shares) at Sep. 30, 2023 (5,600,000)   (5,600,000)