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Contracts in Progress (Tables)
 6 Months Ended
Jun. 30, 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):
June 30, 2023December 31, 2022
Costs incurred on contracts (from inception to completion)$287.5 $249.6 
Estimated earnings181.2 163.1 
Contracts in progress468.7 412.7 
Less: billings to date(401.4)(371.8)
$67.3 $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 Condensed Consolidated Balance Sheets under the following captions (in millions):
June 30, 2023December 31, 2022
Costs and estimated earnings in excess of billings on uncompleted contracts – current$81.7 $50.0 
Costs and estimated earnings in excess of billings on uncompleted contracts – non-current (1)
7.5 17.3 
Billings in excess of costs and estimated earnings on uncompleted contracts – current (2)
(19.5)(25.5)
Billings in excess of costs and estimated earnings on uncompleted contracts – non-current (3)
(2.4)(0.9)
$67.3 $40.9 
(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.