Revenue (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Reconciliation of Revenue from Segments to Consolidated

Revenue from contracts with customers consist of the following (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Revenue
Infrastructure	$	232.0	$	172.3	$	393.3	$	348.8
Spectrum	10.6		9.5		21.1		19.6
Life Sciences	1.2		—		1.2		—
Total revenue	$	243.8	$	181.8	$	415.6	$	368.4

Schedule of Accounts Receivable

Accounts receivables, net from contracts with customers consist of the following (in millions):

	June 30, 2021		December 31, 2020
Accounts receivables with customers
Infrastructure	$	343.7	$	168.5
Spectrum	8.5		7.3
Life Sciences	0.1		—
Total accounts receivables with customers	$	352.3	$	175.8

Accounts receivable, net consist of the following (in millions):

	June 30, 2021		December 31, 2020
Contracts in progress	$	250.5	$	118.6
Unbilled retentions	93.8		50.3
Trade receivables	8.6		7.5
Other receivables	12.2		8.9
Allowance for doubtful accounts	(0.5)		(0.6)
Total	$	364.6	$	184.7

Disaggregation of Revenue

The following table disaggregates DBMG's revenue by market (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Commercial	$	84.8	$	54.0	$	134.3	$	116.8
Industrial	79.0		59.6		119.2		118.4
Transportation	10.8		23.5		24.7		39.9
Government	17.2		11.1		38.5		19.7
Leisure	4.7		11.3		12.2		27.3
Healthcare	11.1		4.7		20.0		12.6
Convention	18.8		1.4		28.2		3.8
Other	5.6		6.1		16.2		9.7
Total revenue from contracts with customers	232.0		171.7		393.3		348.2
Other revenue	—		0.6		—		0.6
Total Infrastructure segment revenue	$	232.0	$	172.3	$	393.3	$	348.8

The following table disaggregates the Life Sciences segment's revenue by type (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Systems revenue	$	1.2	$	—	$	1.2	$	—
Total Life Sciences segment revenue	$	1.2	$	—	$	1.2	$	—

Spectrum Segment

The following table disaggregates the Spectrum segment's revenue by type (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Network advertising	$	4.8	$	4.0	$	9.5	$	9.0
Broadcast station	4.5		3.8		8.9		7.3
Network distribution	0.7		1.0		1.6		2.1
Other	0.6		0.7		1.1		1.2
Total Spectrum segment revenue	$	10.6	$	9.5	$	21.1	$	19.6

Contract with Customer, Asset and Liability

Contract assets and contract liabilities consisted of the following (in millions):

	June 30, 2021		December 31, 2020
Costs and recognized earnings in excess of billings on uncompleted contracts	$	63.7	$	55.6
Billings in excess of costs and recognized earnings on uncompleted contracts	$	(146.8)	$	(52.2)

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 year		Within five years		Total
Commercial	$	580.5	$	620.2	$	1,200.7
Industrial	201.3		—		201.3
Transportation	41.5		17.2		58.7
Government	47.3		—		47.3
Leisure	7.0		—		7.0
Healthcare	51.1		—		51.1
Convention	52.7		—		52.7
Other	5.6		—		5.6
Remaining unsatisfied performance obligations	$	987.0	$	637.4	$	1,624.4