v3.26.1
Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings (Accumulated Deficit)
Treasury Stock, Common
AOCI Attributable to Parent
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Total stockholders' equity   $ 1.3 $ 1,397.6 $ (248.2) $ (235.7) $ (352.2) $ 0.0
Total stockholders' equity   1.3 1,397.6 (248.2) (235.7) (352.2) 0.0
Common stock, shares, outstanding at Dec. 31, 2024 117.6            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss)       7.1      
Net income (loss) attributable to noncontrolling interest             0.0
Vesting of stock-based compensation 1.3            
Stock-based compensation     3.9        
Treasury Stock, Shares, Acquired (0.6)            
Purchase of treasury stock         (2.7)    
Changes in hedges, net of tax           2.2  
Foreign currency translation adjustments           23.3  
Defined benefit plans, net of tax           (0.3)  
Common stock, shares, outstanding at Mar. 31, 2025 118.3            
Common stock, shares, outstanding at Dec. 31, 2024 117.6            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) $ 46.4            
Net income (loss) attributable to noncontrolling interest 0.0            
Purchase of treasury stock 2.7            
Changes in hedges, net of tax [1] 11.0            
Foreign currency translation adjustments 48.1            
Defined benefit plans, net of tax [2] (0.5)            
Non-cash investing activities: Dauch common shares issued for acquisition of Dowlais $ 0.0            
Common stock, shares, outstanding at Jun. 30, 2025 118.6            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Total stockholders' equity   1.3 1,401.5 (241.1) (238.4) (327.0) 0.0
Total stockholders' equity   1.3 1,401.5 (241.1) (238.4) (327.0) 0.0
Common stock, shares, outstanding at Mar. 31, 2025 118.3            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) $ 39.3     39.3      
Net income (loss) attributable to noncontrolling interest $ 0.0           0.0
Vesting of stock-based compensation 0.3            
Stock-based compensation     4.0        
Changes in hedges, net of tax $ 8.8 [1]         8.8  
Foreign currency translation adjustments 24.8         24.8  
Defined benefit plans, net of tax $ (0.2) [2]         (0.2)  
Common stock, shares, outstanding at Jun. 30, 2025 118.6            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Total stockholders' equity   1.3 1,405.5 (201.8) (238.4) (293.6) 0.0
Total stockholders' equity   1.3 1,405.5 (201.8) (238.4) (293.6) 0.0
Total stockholders' equity $ 640.0 1.3 1,411.2 (267.9) (238.5) (266.1) 0.0
Total stockholders' equity $ 640.0 1.3 1,411.2 (267.9) (238.5) (266.1) 0.0
Common stock, shares, outstanding at Dec. 31, 2025 118.7            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss)       (100.3)      
Net income (loss) attributable to noncontrolling interest             0.3
Vesting of stock-based compensation 1.9            
Stock-based compensation     11.0        
Treasury Stock, Shares, Acquired (0.8)            
Purchase of treasury stock         (6.2)    
Changes in hedges, net of tax           6.6  
Foreign currency translation adjustments           13.4  
Defined benefit plans, net of tax           0.4  
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares 117.0            
Non-cash investing activities: Dauch common shares issued for acquisition of Dowlais   1.2 932.2        
Noncontrolling Interest, Increase from Business Combination             19.3
Noncontrolling Interest, Period Increase (Decrease)             (14.3)
Common stock, shares, outstanding at Mar. 31, 2026 236.8            
Common stock, shares, outstanding at Dec. 31, 2025 118.7            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) $ (99.3)            
Net income (loss) attributable to noncontrolling interest 0.8            
Purchase of treasury stock 8.2            
Changes in hedges, net of tax [1] 11.9            
Foreign currency translation adjustments 6.4            
Defined benefit plans, net of tax [2] 0.8            
Non-cash investing activities: Dauch common shares issued for acquisition of Dowlais $ 933.4            
Common stock, shares, outstanding at Jun. 30, 2026 237.5            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Total stockholders' equity   2.5 2,354.4 (368.2) (244.7) (245.7) 5.3
Total stockholders' equity   2.5 2,354.4 (368.2) (244.7) (245.7) 5.3
Common stock, shares, outstanding at Mar. 31, 2026 236.8            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) $ 1.0     1.0      
Net income (loss) attributable to noncontrolling interest $ 0.5           0.5
Vesting of stock-based compensation 1.1            
Stock-based compensation     13.7        
Treasury Stock, Shares, Acquired (0.4)            
Purchase of treasury stock         (2.0)    
Changes in hedges, net of tax $ 5.3 [1]         5.3  
Foreign currency translation adjustments (7.0)         (7.0)  
Defined benefit plans, net of tax $ 0.4 [2]         0.4  
Common stock, shares, outstanding at Jun. 30, 2026 237.5            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Total stockholders' equity $ 1,515.5 2.5 2,368.1 (367.2) (246.7) (247.0) 5.8
Total stockholders' equity $ 1,515.5 $ 2.5 $ 2,368.1 $ (367.2) $ (246.7) $ (247.0) $ 5.8
[1]
Amounts are net of tax of $(1.4) million and $(3.2) million for the three and six months ended June 30, 2026 and $(2.8) million and $(3.7) million for the three and six months ended June 30, 2025.
[2]
Amounts are net of tax of $— million and $0.1 million for the three and six months ended June 30, 2026 and $0.1 million and $0.2 million for the three and six months ended June 30, 2025.