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Revenue (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Reconciliation of Revenue from Segments to Consolidated
Revenue from contracts with customers consist of the following (in millions):
Years Ended December 31,
 20202019
Revenue (1)
Infrastructure
$676.6 $713.3 
Spectrum40.3 41.8 
Other— 0.5 
Total revenue$716.9 $755.6 
(1) The Insurance segment does not have revenues in scope of ASC 606.
Schedule of Accounts Receivable
Accounts receivables, net from contracts with customers consist of the following (in millions):
December 31,
 20202019
Accounts receivables with customers
Infrastructure
$168.5 $199.2 
Spectrum7.3 8.5 
Total accounts receivables with customers$175.8 $207.7 
Accounts receivable, net consist of the following (in millions):
December 31,
 20202019
Contracts in progress$118.6 $149.0 
Unbilled retentions50.3 51.7 
Trade receivables7.5 8.3 
Other receivables8.9 21.0 
Allowance for doubtful accounts(0.6)(1.1)
Total$184.7 $228.9 
Disaggregation of Revenue
The following table disaggregates DBMG's revenue by market (in millions):
Years Ended December 31,
 20202019
Commercial$217.7 $205.4 
Industrial214.9 238.0 
Transportation72.6 64.8 
Leisure42.8 45.7 
Healthcare29.5 49.5 
Convention10.6 77.4 
Other87.8 32.1 
Total revenue from contracts with customers675.9 712.9 
Other revenue0.7 0.4 
Total Infrastructure segment revenue$676.6 $713.3 
The following table disaggregates the Spectrum segment's revenue by type (in millions):
Years Ended December 31,
20202019
Network advertising$18.4 $22.7 
Broadcast station15.5 11.9 
Network distribution4.0 4.9 
Other2.4 2.3 
Total revenue from contracts with customers40.3 41.8 
Other revenue— — 
Total Spectrum segment revenue$40.3 $41.8 
Contract with Customer, Asset and Liability
Contract assets and contract liabilities consisted of the following (in millions):
December 31,
 20202019
Contract assets$55.6 $50.6 
Contract liabilities$(52.2)$(50.6)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
The transaction price allocated to remaining unsatisfied performance obligations consisted of the following (in millions):

 Within one yearWithin five yearsTotal
Commercial$151.1 $2.9 $154.0 
Convention56.1 — 56.1 
Healthcare26.0 — 26.0 
Industrial49.4 — 49.4 
Transportation27.7 — 27.7 
Leisure10.4 — 10.4 
Other58.9 — 58.9 
Remaining unsatisfied performance obligations$379.6 $2.9 $382.5