v3.26.1
Segment Information - Financial information for segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Revenues $ 658.7 $ 647.5 $ 1,230.4 $ 1,195.1  
Cost of revenues 503.0 497.2 953.8 936.9  
Selling, general, and administrative expenses 89.1 70.0 164.9 141.0  
Other operating (income) expense (17.7) (1.7) (19.7) (5.8)  
Operating profit (loss) 84.3 82.0 131.4 123.0  
Depreciation, depletion, and amortization 58.0 54.2 111.5 105.9  
Capital Expenditures 58.8 27.0 102.3 60.0  
Assets 5,301.9 [1]   5,301.9 [1]   $ 4,985.2
Discontinued Operations, Disposed of by Sale          
Segment Reporting [Line Items]          
Total assets of discontinued operations [2] 0.0   0.0   167.9
Corporate          
Segment Reporting [Line Items]          
Revenues 0.0 0.0 0.0 0.0  
Cost of revenues 0.0 0.0 0.0 0.0  
Selling, general, and administrative expenses 30.6 16.2 48.2 32.6  
Other operating (income) expense 2.2 2.8 2.2 2.5  
Operating profit (loss) (32.8) (19.0) (50.4) (35.1)  
Depreciation, depletion, and amortization 0.4 0.4 0.9 0.8  
Capital Expenditures 0.2 0.4 0.7 1.4  
Assets 528.4   528.4   290.2
Construction Products | Total          
Segment Reporting [Line Items]          
Revenues 357.0 354.5 633.3 617.3  
Cost of revenues 276.2 270.1 506.6 487.2  
Selling, general, and administrative expenses 33.1 30.3 66.6 61.5  
Other operating (income) expense (7.4) (4.5) (9.9) (8.3)  
Operating profit (loss) 55.1 58.6 70.0 76.9  
Depreciation, depletion, and amortization 45.2 41.8 85.6 80.4  
Capital Expenditures 37.1 18.6 69.0 43.0  
Assets 3,442.1   3,442.1   3,281.9
Engineered Structures | Total          
Segment Reporting [Line Items]          
Revenues 301.7 293.0 597.1 577.8  
Cost of revenues 226.8 227.1 447.2 449.7  
Selling, general, and administrative expenses 25.4 23.5 50.1 46.9  
Other operating (income) expense (12.5) 0.0 (12.0) 0.0  
Operating profit (loss) 62.0 42.4 111.8 81.2  
Depreciation, depletion, and amortization 12.4 12.0 25.0 24.7  
Capital Expenditures 21.5 $ 8.0 32.6 $ 15.6  
Assets $ 1,331.4   $ 1,331.4   $ 1,245.2
[1] (unaudited)
[2] (1) Included in current and/or non-current assets of discontinued operations on the Consolidated Balance Sheets