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Contracts in Progress (Tables)
 3 Months Ended
Mar. 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):
March 31, 2023December 31, 2022
Costs incurred on contracts (from inception to completion)$270.0 $249.6 
Estimated earnings163.6 163.1 
Contracts in progress433.6 412.7 
Less: billings to date(377.7)(371.8)
$55.9 $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 Condensed Consolidated Balance Sheets under the following captions (in millions):
March 31, 2023December 31, 2022
Costs and estimated earnings in excess of billings on uncompleted contracts – current$67.2 $50.0 
Costs and estimated earnings in excess of billings on uncompleted contracts – non-current (1)
9.6 17.3 
Billings in excess of costs and estimated earnings on uncompleted contracts – current (2)
(18.5)(25.5)
Billings in excess of costs and estimated earnings on uncompleted contracts – non-current (3)
(2.4)(0.9)
$55.9 $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.