v3.25.4
Segment Information - Schedule of Operating Segment Reporting Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information [Line Items]      
Sales [1],[2] $ 1,893.9 $ 1,903.0 $ 1,789.0
Operating income (loss) 171.6 186.1 215.3
Depreciation and amortization 122.3 124.0 124.8
Equity in earnings (losses) from affiliated companies   81.1 8.1
Other operating expense (income) 37.8 50.0 1.4
Segment assets 2,704.0 2,725.6 2,918.5
Investments in affiliated companies 5.0 5.0 5.0
Accrual basis additions to property, plant and equipment 81.2   121.6
Stock-based compensation 14.4 22.2 20.9
Cost of sales 1,459.1 1,433.2 1,355.8
Gross margin 434.8 469.8 433.2
Selling, general and administrative expenses 169.0 176.6 163.8
Research and technology expenses 56.4 57.1 52.7
Intersegment Elimination      
Segment Reporting Information [Line Items]      
Sales (82.8) (91.2) (73.0)
Composite Materials      
Segment Reporting Information [Line Items]      
Sales 1,516.2 1,531.0 1,474.2
Composite Materials | Operating Segments      
Segment Reporting Information [Line Items]      
Sales 1,595.2 1,621.0 1,544.8
Operating income (loss) 221.0 215.0 237.9
Depreciation and amortization 109.4 109.1 110.4
Other operating expense (income) 2.8 40.8 1.2
Segment assets 2,066.7 2,147.6 2,309.3
Accrual basis additions to property, plant and equipment 75.1 67.1 70.9
Stock-based compensation 5.3 6.1 6.2
Cost of sales 1,217.6 1,218.8 1,165.1
Gross margin 377.6 402.2 379.7
Selling, general and administrative expenses 105.2 98.3 95.5
Research and technology expenses 48.6 48.1 45.1
Composite Materials | Intersegment Elimination      
Segment Reporting Information [Line Items]      
Sales 79.0 90.0 70.6
Engineered Products      
Segment Reporting Information [Line Items]      
Sales 377.7 372.0 314.8
Engineered Products | Operating Segments      
Segment Reporting Information [Line Items]      
Sales 381.5 373.2 317.2
Operating income (loss) 13.1 39.6 32.8
Depreciation and amortization 12.9 14.9 14.4
Equity in earnings (losses) from affiliated companies   14.0 8.1
Other operating expense (income) 29.3 7.7 0.2
Segment assets 596.2 541.4 543.1
Accrual basis additions to property, plant and equipment 6.1   50.7
Stock-based compensation 1.3 1.5 1.7
Cost of sales 319.8 299.5 261.1
Gross margin 61.7 73.7 56.1
Selling, general and administrative expenses 15.2 21.7 19.0
Research and technology expenses 4.1 4.7 4.1
Engineered Products | Intersegment Elimination      
Segment Reporting Information [Line Items]      
Sales 3.8 1.2 2.4
Corporate & Other and Intersegment Elimination      
Segment Reporting Information [Line Items]      
Sales (82.8) (91.2) (73.0)
Corporate & Other and Intersegment Elimination | Operating Segments      
Segment Reporting Information [Line Items]      
Operating income (loss) (62.5) (68.5) (55.4)
Other operating expense (income) 5.7 (1.5) 0.0
Segment assets 41.1 36.6 66.1
Investments in affiliated companies 5.0 5.0 5.0
Stock-based compensation 7.8 14.6 13.0
Cost of sales (78.3) (85.1) (70.4)
Gross margin (4.5) (6.1) (2.6)
Selling, general and administrative expenses 48.6 56.6 49.3
Research and technology expenses $ 3.7 $ 4.3 $ 3.5
[1] Net sales by geography based on the location in which the product sold was manufactured.
[2] Net sales to external customers based on the location to which the product sold was delivered.