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Revenue (Tables)
 9 Months Ended
Sep. 30, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue by Timing
The following table represents a disaggregation of revenue by timing of revenue along with the reportable segment for each category:
 
Three Months Ended September 30, 2019
 
E&C Cryogenics
 
E&C FinFans
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Point in time
$
1.7

 
$
20.7

 
$
101.2

 
$
64.1

 
$
(5.0
)
 
$
182.7

Over time
47.2

 
107.9

 
13.7

 
6.3

 
—

 
175.1

Total
$
48.9

 
$
128.6

 
$
114.9

 
$
70.4

 
$
(5.0
)
 
$
357.8

 
Three Months Ended September 30, 2018
 
E&C Cryogenics
 
E&C FinFans
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Point in time
$
2.3

 
$
16.6

 
$
102.8

 
$
55.0

 
$
(1.3
)
 
$
175.4

Over time
33.3

 
45.9

 
16.2

 
1.8

 
(0.4
)
 
96.8

Total
$
35.6

 
$
62.5

 
$
119.0

 
$
56.8

 
$
(1.7
)
 
$
272.2

 
Nine Months Ended September 30, 2019
 
E&C Cryogenics
 
E&C FinFans
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Point in time
$
10.8

 
$
58.6

 
$
310.5

 
$
203.0

 
$
(8.2
)
 
$
574.7

Over time
120.5

 
213.4

 
34.3

 
13.8

 
—

 
382.0

Total
$
131.3

 
$
272.0

 
$
344.8

 
$
216.8

 
$
(8.2
)
 
$
956.7

 
Nine Months Ended September 30, 2018
 
E&C Cryogenics
 
E&C FinFans
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Point in time
$
10.6

 
$
55.9

 
$
299.3

 
$
157.0

 
$
(4.4
)
 
$
518.4

Over time
88.0

 
134.3

 
37.9

 
17.3

 
(1.7
)
 
275.8

Total
$
98.6

 
$
190.2

 
$
337.2

 
$
174.3

 
$
(6.1
)
 
$
794.2
Changes in Contract Assets and Contract Liabilities Balances
The following table represents changes in our contract assets and contract liabilities balances:
 
September 30,
 2019
 
December 31, 2018
 
Year-to-date Change ($)
 
Year-to-date Change (%)
Contract assets
 
 
 
 
 
 
 
Accounts receivable, net of allowances
$
224.5

 
$
194.8

 
$
29.7

 
15.2
 %
Unbilled contract revenue
81.6

 
54.5

 
27.1

 
49.7
 %
 
 
 
 
 
 
 
 
Contract liabilities
 
 
 
 
 
 
 
Customer advances and billings in excess of contract revenue
$
120.5

 
$
130.0

 
$
(9.5
)
 
(7.3
)%
Long-term deferred revenue
1.0

 
1.4

 
(0.4
)
 
(28.6
)%