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Revenue (Tables)
 9 Months Ended
Sep. 30, 2018
Revenue from Contract with Customer [Abstract]  
Changes in Contract Assets and Contract Liabilities Balances
The following table represents changes in our contract assets and contract liabilities balances:
 
September 30, 2018
 
January 1, 2018
 
Year-to-date Change ($)
 
Year-to-date Change (%)
Contract assets
 
 
 
 
 
 
 
Accounts receivable, net of allowances
$
177.3

 
$
196.4

 
(19.1
)
 
9.7
%
Unbilled contract revenue
34.2

 
43.0

 
(8.8
)
 
20.5
%
 
 
 
 
 
 
 
 
Contract liabilities
 
 
 
 
 
 
 
Customer advances and billings in excess of contract revenue
$
94.5

 
$
99.7

 
(5.2
)
 
5.2
%
Long-term deferred revenue
1.6

 
1.7

 
(0.1
)
 
5.9
%
Disaggregation of Revenue by Product Application
The following table represents a disaggregation of revenue by product application along with the reportable segment for each category:
 
Three Months Ended September 30, 2018
 
Energy & Chemicals
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Natural gas processing (including petrochemical) applications
$
63.5

 
$
—

 
$
—

 
$
—

 
$
63.5

Liquefied natural gas (LNG) applications
12.4

 
20.5

 
11.8

 
(0.4
)
 
44.3

Industrial gas applications
3.4

 
—

 
—

 
—

 
3.4

HVAC, power and refining applications
18.8

 
—

 
—

 
—

 
18.8

Bulk industrial gas applications
—

 
41.1

 
31.8

 
(0.4
)
 
72.5

Packaged gas industrial applications
—

 
37.2

 
13.2

 
(0.9
)
 
49.5

Cryobiological storage
—

 
20.2

 
—

 
—

 
20.2

Total
$
98.1

 
$
119.0

 
$
56.8

 
$
(1.7
)
 
$
272.2

 
Nine Months Ended September 30, 2018
 
Energy & Chemicals
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Natural gas processing (including petrochemical) applications
$
191.2

 
$
—

 
$
—

 
$
—

 
$
191.2

Liquefied natural gas (LNG) applications
28.5

 
54.4

 
48.3

 
(2.0
)
 
129.2

Industrial gas applications
9.8

 
—

 
—

 
—

 
9.8

HVAC, power and refining applications
59.3

 
—

 
—

 
—

 
59.3

Bulk industrial gas applications
—

 
105.7

 
85.8

 
(1.2
)
 
190.3

Packaged gas industrial applications
—

 
117.8

 
40.2

 
(2.9
)
 
155.1

Cryobiological storage
—

 
59.3

 
—

 
—

 
59.3

Total
$
288.8

 
$
337.2

 
$
174.3

 
$
(6.1
)
 
$
794.2
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, 2018
 
Energy & Chemicals
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Point in time
$
18.9

 
$
102.8

 
$
55.0

 
$
(1.3
)
 
$
175.4

Over time
79.2

 
16.2

 
1.8

 
(0.4
)
 
96.8

Total
$
98.1

 
$
119.0

 
$
56.8

 
$
(1.7
)
 
$
272.2

 
Nine Months Ended September 30, 2018
 
Energy & Chemicals
 
D&S West
 
D&S East
 
Intersegment Eliminations
 
Consolidated
Point in time
$
66.5

 
$
299.3

 
$
157.0

 
$
(4.4
)
 
$
518.4

Over time
222.3

 
37.9

 
17.3

 
(1.7
)
 
275.8

Total
$
288.8

 
$
337.2

 
$
174.3

 
$
(6.1
)
 
$
794.2