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Revenue and Contracts in Process (Tables)
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Reconciliation of Revenue from Segments to Consolidated
Revenue from contracts with customers consisted of the following (in millions):

Year Ended December 31,
 20242023
Infrastructure
$1,071.6 $1,397.2 
Life Sciences9.8 3.3 
Spectrum25.7 22.5 
Total revenue$1,107.1 $1,423.0 
Schedule of Accounts Receivable, net
Accounts receivables, net, from contracts with customers consisted of the following (in millions):
December 31,
 20242023
Infrastructure
$184.8 $271.5 
Life Sciences1.5 0.3 
Spectrum1.9 1.4 
Total accounts receivables with customers$188.2 $273.2 
Accounts receivable, net, consisted of the following (in millions):
December 31,
 20242023
Contracts in progress$184.9 $271.7 
Unbilled retentions0.1 — 
Trade receivables3.3 1.9 
Other receivables5.8 5.2 
Allowance for expected credit losses
(0.1)(0.4)
Total$194.0 $278.4 
Schedule of Disaggregation of Revenue
The following table disaggregates DBMG's revenue by market (in millions):

Year ended December 31,
 20242023
Industrial$307.9 $403.0 
Commercial292.6 382.9 
Transportation275.3 292.3 
Healthcare151.6 165.5 
Convention14.0 124.2 
Government11.7 11.2 
Leisure9.6 8.1 
Energy7.2 9.2 
Total revenue from contracts with customers$1,069.9 $1,396.4 
Other revenue1.7 0.8 
Total Infrastructure segment revenue$1,071.6 $1,397.2 
The following table disaggregates the Life Sciences segment's revenue by type (in millions):

Year Ended December 31,
20242023
Systems and consumables revenue$9.8 $3.3 
Total Life Sciences segment revenue$9.8 $3.3 
The following table disaggregates the Spectrum segment's revenue by type (in millions):

Year ended December 31,
20242023
Broadcast station$25.7 $21.9 
Other— 0.6 
Total Spectrum segment revenue$25.7 $22.5 
Schedule of Costs and Recognized Earnings in Excess of Billings and Billings in Excess of Costs and Recognized Earnings on Uncompleted Contracts
Contract assets and contract liabilities consisted of the following (in millions):
December 31,

20242023
Costs incurred on contracts in progress$1,435.2 $2,811.8 
Estimated earnings75.8 510.1
Contract revenue earned on uncompleted contracts1,511.0 3,321.9 
Less: progress billings1,513.8 3,356.8 
$(2.8)$(34.9)
The above is included in the accompanying Consolidated Balance Sheets under the following line items:
Contract assets$106.3 $118.6 
Contract liabilities(109.1)(153.5)
$(2.8)$(34.9)
Schedule of Contract with Customer, Asset and Liability
December 31,
 20242023
Cost in excess of billings and estimated earnings$50.8 $73.8 
Conditional retainage55.5 44.8 
Contract assets$106.3 $118.6 
Billings in excess of costs and estimated earnings$(147.7)$(229.3)
Conditional retainage38.6 75.8 
Contract liabilities$(109.1)$(153.5)
Schedule of Remaining Performance Obligations
As of December 31, 2024, the transaction price allocated to remaining unsatisfied performance obligations consisted of the following (in millions):
 Within One YearWithin Five YearsTotal
Healthcare$172.6 $128.7 $301.3 
Transportation133.3 58.1 191.4 
Commercial158.5 6.1 164.6 
Industrial144.0 0.3 144.3 
Government87.1 22.8 109.9 
Leisure11.1 11.4 22.5 
Convention7.5 — 7.5 
Energy2.1 — 2.1 
Remaining unsatisfied performance obligations$716.2 $227.4 $943.6