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Contracts in Progress (Tables)
 12 Months Ended
Dec. 31, 2023
Revenue from Contract with Customer [Abstract]  
Schedule of Cost and Billings on Uncompleted Construction Type Long Term Contracts or Programs
Costs and billings on uncompleted construction-type contracts consist of the following (in millions):
December 31, 2023December 31, 2022
Costs incurred on contracts (from inception to completion)$324.5 $249.6 
Estimated earnings208.7 163.1 
Contracts in progress533.2 412.7 
Less: billings to date(511.3)(371.8)
$21.9 $40.9 
Schedule of Costs in Excess of Billings and Billings in Excess of Costs on Uncompleted Contracts
The carrying amounts related to uncompleted construction-type contracts are included in the accompanying consolidated balance sheets under the following captions (in millions):
December 31, 2023December 31, 2022
Costs and estimated earnings in excess of billings on uncompleted contracts – current$48.7 $50.0 
Costs and estimated earnings in excess of billings on uncompleted contracts – non-current (1)
18.2 17.3 
Billings in excess of costs and estimated earnings on uncompleted contracts – current (2)
(41.1)(25.5)
Billings in excess of costs and estimated earnings on uncompleted contracts – non-current (3)
(3.9)(0.9)
$21.9 $40.9 
(1)Included in other assets within the consolidated balance sheets.
(2)Included in deferred contract revenue – current within the consolidated balance sheets.
(3)Included in other liabilities within the consolidated balance sheets.