Revenue and Contracts in Process - Schedule of Infrastructure Segment Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total Infrastructure segment revenue	$ 1,107.1	$ 1,423.0
Infrastructure
Disaggregation of Revenue [Line Items]
Revenue	1,069.9	1,396.4
Other revenue	1.7	0.8
Total Infrastructure segment revenue	1,071.6	1,397.2
Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue	307.9	403.0
Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue	292.6	382.9
Infrastructure | Transportation
Disaggregation of Revenue [Line Items]
Revenue	275.3	292.3
Infrastructure | Healthcare
Disaggregation of Revenue [Line Items]
Revenue	151.6	165.5
Infrastructure | Convention
Disaggregation of Revenue [Line Items]
Revenue	14.0	124.2
Infrastructure | Government
Disaggregation of Revenue [Line Items]
Revenue	11.7	11.2
Infrastructure | Leisure
Disaggregation of Revenue [Line Items]
Revenue	9.6	8.1
Infrastructure | Energy
Disaggregation of Revenue [Line Items]
Revenue	$ 7.2	$ 9.2