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Contracts in Progress (Tables)
 6 Months Ended
Jun. 30, 2024
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):
June 30, 2024December 31, 2023
Costs incurred on contracts (from inception to completion)$374.0 $324.5 
Estimated earnings219.8 208.7 
Contracts in progress593.8 533.2 
Less: billings to date(543.4)(511.3)
$50.4 $21.9 
Schedule of Contract with Customer, Contract Asset, Contract Liability, and Receivable
The carrying amounts related to uncompleted construction-type contracts are included in the accompanying unaudited Condensed Consolidated Balance Sheets under the following captions (in millions):
June 30, 2024December 31, 2023
Costs and estimated earnings in excess of billings on uncompleted contracts – current$63.6 $48.7 
Costs and estimated earnings in excess of billings on uncompleted contracts – non-current (1)
21.8 18.2 
Billings in excess of costs and estimated earnings on uncompleted contracts – current (2)
(32.4)(41.1)
Billings in excess of costs and estimated earnings on uncompleted contracts – non-current (3)
(2.6)(3.9)
$50.4 $21.9 
(1)Included in other assets within the Condensed Consolidated Balance Sheets.
(2)Included in deferred contract revenue – current within the Condensed Consolidated Balance Sheets.
(3)Included in other liabilities within the Condensed Consolidated Balance Sheets.