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Commitments and Contingencies (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Aug. 16, 2024	Mar. 31, 2018
Loss Contingencies [Line Items]
Accrued liability related to obligation		$ 5.8
Discontinued Operations \| Minimum
Loss Contingencies [Line Items]
Estimated amount of potential loss liability	$ 5.8	5.8
Discontinued Operations \| Maximum
Loss Contingencies [Line Items]
Estimated amount of potential loss liability	19.4	19.4
Surety Bond \| Maritech
Loss Contingencies [Line Items]
Estimated amount of potential loss liability			$ 10.7
Bond proceeds	3.9
Discontinued Operations, Disposed of by Sale \| Offshore Division \| Initial Bonds
Loss Contingencies [Line Items]
Aggregate amount of performance bonds				$ 46.8
Discontinued Operations, Disposed of by Sale \| Offshore Division \| Interim Replacement Bonds
Loss Contingencies [Line Items]
Aggregate amount of performance bonds				$ 47.0
Supply Agreements
Loss Contingencies [Line Items]
Purchase obligation	69.5	69.5
Purchase obligation, remainder of 2024	3.3	3.3
Purchase obligation, 2025	26.1	26.1
Purchase obligation, 2026	22.3	22.3
Purchase obligation, 2027	15.5	15.5
Purchase obligation, 2028	2.3	2.3
Long-lead Infrastructure
Loss Contingencies [Line Items]
Purchase obligation	$ 5.6	$ 5.6