Annual report [Section 13 and 15(d), not S-K Item 405]

Revenue, Contract Assets and Liabilities and Other Contract Matters - Summary of Contract with Customer, Asset and Liability (Parenthetical) (Details)

v3.25.0.1
Revenue, Contract Assets and Liabilities and Other Contract Matters - Summary of Contract with Customer, Asset and Liability (Parenthetical) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Contract with customer, asset, revenue recognized in excess of amounts billed, current $ 6.0   $ 4.6
Contract with customer, liability, revenue recognized 4.9 $ 6.6  
Shipyard Division      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Contract with customer, liability, accrued contract losses, current $ 0.4