Revenue and Contracts in Process - Schedule of Infrastructure Segment Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Total Infrastructure segment revenue	$ 1,246.0	$ 1,107.1
Infrastructure
Disaggregation of Revenue [Line Items]
Revenue	1,208.6	1,069.9
Other revenue	1.7	1.7
Total Infrastructure segment revenue	1,210.3	1,071.6
Infrastructure \| Commercial
Disaggregation of Revenue [Line Items]
Revenue	371.9	292.6
Infrastructure \| Industrial
Disaggregation of Revenue [Line Items]
Revenue	306.6	307.9
Infrastructure \| Transportation
Disaggregation of Revenue [Line Items]
Revenue	192.9	275.3
Infrastructure \| Healthcare
Disaggregation of Revenue [Line Items]
Revenue	173.1	151.6
Infrastructure \| Government
Disaggregation of Revenue [Line Items]
Revenue	128.8	11.7
Infrastructure \| Energy
Disaggregation of Revenue [Line Items]
Revenue	13.5	7.2
Infrastructure \| Leisure
Disaggregation of Revenue [Line Items]
Revenue	13.0	9.6
Infrastructure \| Convention
Disaggregation of Revenue [Line Items]
Revenue	$ 8.8	$ 14.0

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