v3.25.2
Sales and Segment Adjusted EBITDA (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]          
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 $ 1,680.5 $ 1,777.6 $ 3,214.1 $ 3,528.1  
Less: intersegment sales 144.3 145.3 266.6 288.9  
Net external sales 1,536.2 1,632.3 2,947.5 3,239.2  
Segment Reporting, Cost of Goods Sold, Amount 1,247.7 1,321.1 2,398.6 2,637.3  
Segment Reporting, Selling, General and Administrative Expenses, Amount 95.5 100.2 181.3 193.6  
Segment Reporting, Other Segment Item, Amount (9.2) 2.6 (11.9) (5.7)  
Segment Adjusted EBITDA 202.2 208.4 379.5 414.0  
Depreciation and amortization 113.5 119.6 225.7 237.4  
Segment, Expenditure, Addition to Long-Lived Assets 57.3 48.8 126.6 96.8  
Assets 5,273.6 5,336.7 5,273.6 5,336.7 $ 5,059.9
Driveline [Member]          
Segment Reporting Information [Line Items]          
Sales 1,082.1 1,124.5 2,039.9 2,230.9  
Less: intersegment sales 0.8 0.2 1.4 0.2  
Net external sales 1,081.3 1,124.3 2,038.5 2,230.7  
Segment Reporting, Cost of Goods Sold, Amount 864.0 893.5 1,629.6 1,774.9  
Segment Reporting, Selling, General and Administrative Expenses, Amount 72.9 79.0 138.8 150.8  
Segment Reporting, Other Segment Item, Amount (4.5) 0.0 (4.1) (4.2)  
Segment Adjusted EBITDA 148.9 151.8 274.2 309.2  
Depreciation and amortization 60.0 62.0 119.4 124.1  
Segment, Expenditure, Addition to Long-Lived Assets 32.0 28.4 73.5 53.0  
Assets 2,540.0 2,538.7 2,540.0 2,538.7  
Driveline [Member] | Cost of Sales [Member]          
Segment Reporting Information [Line Items]          
Depreciation 50.9 52.9 101.4 106.0  
Driveline [Member] | Selling, General and Administrative Expenses          
Segment Reporting Information [Line Items]          
Depreciation 4.5 4.1 8.7 8.1  
Metal Forming [Member]          
Segment Reporting Information [Line Items]          
Sales 598.4 653.1 1,174.2 1,297.2  
Less: intersegment sales 143.5 145.1 265.2 288.7  
Net external sales 454.9 508.0 909.0 1,008.5  
Segment Reporting, Cost of Goods Sold, Amount 383.7 427.6 769.0 862.4  
Segment Reporting, Selling, General and Administrative Expenses, Amount 22.6 21.2 42.5 42.8  
Segment Reporting, Other Segment Item, Amount (4.7) 2.6 (7.8) (1.5)  
Segment Adjusted EBITDA 53.3 56.6 105.3 104.8  
Depreciation and amortization 53.5 57.6 106.3 113.3  
Segment, Expenditure, Addition to Long-Lived Assets 24.9 19.6 52.1 42.0  
Assets 1,650.6 1,757.1 1,650.6 1,757.1  
Metal Forming [Member] | Cost of Sales [Member]          
Segment Reporting Information [Line Items]          
Depreciation 36.9 41.0 72.9 80.1  
Metal Forming [Member] | Selling, General and Administrative Expenses          
Segment Reporting Information [Line Items]          
Depreciation 0.8 0.9 1.7 1.8  
Corporate Nonsegment          
Segment Reporting Information [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, Expenditure, Addition to Long-Lived Assets 0.4 0.8 1.0 1.8  
Assets $ 1,083.0 $ 1,040.9 $ 1,083.0 $ 1,040.9