v3.26.1
Sales and Segment Adjusted EBITDA (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Segments
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Line Items]          
Number of Reportable Segments | Segments     2    
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]     Chief Executive Officer [Member]    
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description     We use Segment Adjusted EBITDA as the measure of earnings to assess the performance of each segment and determine the resources to be allocated to the segments.    
Sales $ 3,086.7 $ 1,652.2 $ 5,582.0 $ 3,164.7  
Less: intersegment sales 131.1 116.0 247.5 217.2  
Net external sales 2,955.6 1,536.2 5,334.5 2,947.5  
Segment Reporting, Cost of Goods Sold, Amount 2,428.2 1,247.8 4,386.9 2,398.3  
Segment Reporting, Selling, General and Administrative Expenses, Amount 161.3 95.5 292.9 181.3  
Segment Reporting, Other Segment Item, Amount (23.5) (9.2) (43.4) (11.9)  
Segment Adjusted EBITDA 389.6 202.1 698.1 379.8  
Depreciation and amortization 215.4 113.5 397.2 225.7  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 98.3 57.3 201.9 126.6  
Assets 11,050.0 5,273.6 11,050.0 5,273.6 $ 6,670.2
Loss on disposal of property, plant and equipment (1.3) 0.1 (5.0) (0.3)  
Acquisition-related fair value inventory adjustment 0.0 0.0 (37.7) 0.0  
Segment Reporting, Reconciling Item, Corporate Nonsegment          
Segment Reporting [Line Items]          
Sales 0.0 0.0 0.0 0.0  
Less: intersegment sales 0.0 0.0 0.0 0.0  
Net external sales 0.0 0.0 0.0 0.0  
Segment Reporting, Cost of Goods Sold, Amount 0.0 0.0 0.0 0.0  
Segment Reporting, Selling, General and Administrative Expenses, Amount 0.0 0.0 0.0 0.0  
Segment Reporting, Other Segment Item, Amount 0.0 0.0 0.0 0.0  
Segment Adjusted EBITDA 0.0 0.0 0.0 0.0  
Depreciation and amortization 0.0 0.0 0.0 0.0  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 0.9 0.4 1.7 1.0  
Assets 742.0 1,083.0 742.0 1,083.0  
Driveline [Member]          
Segment Reporting [Line Items]          
Net external sales 2,221.6 1,105.4 3,987.2 2,090.6  
Driveline [Member] | Operating Segments          
Segment Reporting [Line Items]          
Sales 2,225.0 1,107.2 3,994.1 2,094.2  
Less: intersegment sales 3.4 1.8 6.9 3.6  
Net external sales 2,221.6 1,105.4 3,987.2 2,090.6  
Segment Reporting, Cost of Goods Sold, Amount 1,819.1 879.3 3,268.0 1,664.1  
Segment Reporting, Selling, General and Administrative Expenses, Amount 127.6 74.0 220.6 141.2  
Segment Reporting, Other Segment Item, Amount (14.8) (3.3) (29.9) (2.8)  
Segment Adjusted EBITDA 289.7 155.4 528.5 288.1  
Depreciation and amortization 144.6 63.6 263.3 126.6  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 66.0 35.0 146.1 80.1  
Assets 7,651.5 2,694.4 7,651.5 2,694.4  
Driveline [Member] | Cost of goods sold          
Segment Reporting [Line Items]          
Depreciation 133.1 54.5 240.2 108.6  
Loss on disposal of property, plant and equipment 0.2 0.3 1.3 0.4  
Acquisition-related fair value inventory adjustment     28.8    
Driveline [Member] | Selling, general and administrative expenses [Member]          
Segment Reporting [Line Items]          
Depreciation 4.7 4.5 9.5 8.7  
Metal Forming [Member]          
Segment Reporting [Line Items]          
Net external sales 734.0 430.8 1,347.3 856.9  
Metal Forming [Member] | Operating Segments          
Segment Reporting [Line Items]          
Sales 861.7 545.0 1,587.9 1,070.5  
Less: intersegment sales 127.7 114.2 240.6 213.6  
Net external sales 734.0 430.8 1,347.3 856.9  
Segment Reporting, Cost of Goods Sold, Amount 609.1 368.5 1,118.9 734.2  
Segment Reporting, Selling, General and Administrative Expenses, Amount 33.7 21.5 72.3 40.1  
Segment Reporting, Other Segment Item, Amount (8.7) (5.9) (13.5) (9.1)  
Segment Adjusted EBITDA 99.9 46.7 169.6 91.7  
Depreciation and amortization 70.8 49.9 133.9 99.1  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 31.4 21.9 54.1 45.5  
Assets 2,656.5 1,496.2 2,656.5 1,496.2  
Metal Forming [Member] | Cost of goods sold          
Segment Reporting [Line Items]          
Depreciation 54.8 33.3 101.1 65.7  
Loss on disposal of property, plant and equipment 1.1 (0.4) 3.7 (0.1)  
Acquisition-related fair value inventory adjustment     8.9    
Metal Forming [Member] | Selling, general and administrative expenses [Member]          
Segment Reporting [Line Items]          
Depreciation $ 0.9 $ 0.8 $ 1.8 $ 1.7