v3.26.3
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($)
$ in Millions
Total
Common Stock
Additional paid-in capital
Treasury Stock, Common
Retained earnings
Accumulated other comprehensive income
Noncontrolling interests
Balance, beginning of period at Dec. 31, 2024   $ 1.9 $ 3,990.5 $ (1,926.5) $ 1,445.8 $ 138.8 $ 58.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation for equity-classified awards     8.9        
Capped calls related to the issuance of 2031 Convertible Notes     0.0        
Net loss $ (54.9)       (63.3)   8.4
Dividends declared ($0.075, $0.075, $0.225 and $0.225 per share, respectively)     0.3   27.8    
Repurchase of employee common stock relinquished for tax withholding (0.8)     (0.8)      
Postretirement plans (net of $0.0 tax provisions in each period) (30.6)         (30.6)  
Foreign currency translation adjustment 2.6         2.6  
Distributions to noncontrolling interests             (22.8)
Balance, end of period at Sep. 30, 2025 $ 3,583.7 1.9 3,999.7 (1,927.3) 1,354.7 110.8 43.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Remaining Fair Value Adjustment on Convertible Notes     0.0        
Dividends declared per share $ 0.225            
Balance, beginning of period at Jun. 30, 2025   1.9 3,996.0 (1,927.3) 1,434.1 120.6 48.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation for equity-classified awards     3.6        
Capped calls related to the issuance of 2031 Convertible Notes     0.0        
Net loss $ (66.9)       (70.1)   3.2
Dividends declared ($0.075, $0.075, $0.225 and $0.225 per share, respectively)         9.3    
Repurchase of employee common stock relinquished for tax withholding       0.0      
Postretirement plans (net of $0.0 tax provisions in each period) (10.2)         (10.2)  
Foreign currency translation adjustment 0.4         0.4  
Distributions to noncontrolling interests             (8.1)
Balance, end of period at Sep. 30, 2025 3,583.7 1.9 3,999.7 (1,927.3) 1,354.7 110.8 43.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends, Stock $ 0.1            
Remaining Fair Value Adjustment on Convertible Notes     0.0        
Dividends declared per share $ 0.075            
Balance, beginning of period at Dec. 31, 2025 $ 3,582.2 1.9 4,004.8 (1,927.3) 1,355.9 101.1 45.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation for equity-classified awards     11.1        
Capped calls related to the issuance of 2031 Convertible Notes     (16.7)        
Net loss (140.7)       (155.8)   15.1
Dividends declared ($0.075, $0.075, $0.225 and $0.225 per share, respectively)     0.3   27.7    
Repurchase of employee common stock relinquished for tax withholding (3.3)     (3.3)      
Postretirement plans (net of $0.0 tax provisions in each period) 2.9         2.9  
Foreign currency translation adjustment 2.1         2.1  
Distributions to noncontrolling interests             (16.4)
Balance, end of period at Sep. 30, 2026 $ 3,246.5 1.9 3,852.2 (1,930.6) 1,172.4 106.1 44.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Remaining Fair Value Adjustment on Convertible Notes     (147.3)        
Dividends declared per share $ 0.225            
Balance, beginning of period at Jun. 30, 2026   1.9 3,865.8 (1,930.6) 1,214.4 97.1 49.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation for equity-classified awards     2.5        
Capped calls related to the issuance of 2031 Convertible Notes     0.0        
Net loss $ (28.9)       (32.8)   3.9
Dividends declared ($0.075, $0.075, $0.225 and $0.225 per share, respectively)         9.2    
Repurchase of employee common stock relinquished for tax withholding       0.0      
Postretirement plans (net of $0.0 tax provisions in each period) 8.6         8.6  
Foreign currency translation adjustment 0.4         0.4  
Distributions to noncontrolling interests             (8.7)
Balance, end of period at Sep. 30, 2026 3,246.5 $ 1.9 3,852.2 $ (1,930.6) $ 1,172.4 $ 106.1 $ 44.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends, Stock $ 0.1            
Remaining Fair Value Adjustment on Convertible Notes     $ (16.2)        
Dividends declared per share $ 0.075