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Segments and Related Information - Schedule of Financial Information by Reportable Segment - Depreciation and Amortization (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Depreciation and Amortization:      
Consolidated depreciation and amortization $ 427.1 $ 506.6 $ 603.2
Reportable Segments | Communications      
Depreciation and Amortization:      
Consolidated depreciation and amortization 60.3 74.4 84.0
Reportable Segments | Clean Energy and Infrastructure      
Depreciation and Amortization:      
Consolidated depreciation and amortization 108.1 123.0 144.2
Reportable Segments | Power Delivery      
Depreciation and Amortization:      
Consolidated depreciation and amortization 142.3 170.2 211.7
Reportable Segments | Pipeline Infrastructure      
Depreciation and Amortization:      
Consolidated depreciation and amortization 107.4 128.8 152.9
Reportable Segments | Other      
Depreciation and Amortization:      
Consolidated depreciation and amortization 0.0 0.0 0.0
Corporate      
Depreciation and Amortization:      
Consolidated depreciation and amortization $ 9.0 $ 10.2 $ 10.4