Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue by Timing

The following tables represent a disaggregation of revenue by timing of revenue along with the reportable segment for each category:

	Year Ended December 31, 2020
	Cryo Tank Solutions		Heat Transfer Systems		Specialty Products		Repair, Service & Leasing		Intersegment Eliminations		Consolidated
Point in time	$	378.3	$	28.6	$	184.6	$	110.3	$	(4.5)	$	697.3
Over time	37.5		341.2		58.0		48.0		(4.9)		479.8
Total	$	415.8	$	369.8	$	242.6	$	158.3	$	(9.4)	$	1,177.1

	Year Ended December 31, 2019
	Cryo Tank Solutions		Heat Transfer Systems		Specialty Products		Repair, Service & Leasing		Intersegment Eliminations		Consolidated
Point in time	$	385.2	$	26.3	$	161.2	$	117.6	$	(5.2)	$	685.1
Over time	24.7		415.4		46.7		45.0		(1.4)		530.4
Total	$	409.9	$	441.7	$	207.9	$	162.6	$	(6.6)	$	1,215.5

	Year Ended December 31, 2018
	Cryo Tank Solutions		Heat Transfer Systems		Specialty Products		Repair, Service & Leasing		Intersegment Eliminations		Consolidated
Point in time	$	366.9	$	60.3	$	150.3	$	102.5	$	(2.2)	$	677.8
Over time	4.5		229.5		34.2		57.9		—		326.1
Total	$	371.4	$	289.8	$	184.5	$	160.4	$	(2.2)	$	1,003.9

Changes in Contract Assets and Contract Liabilities Balances

The following table represents changes in our contract assets and contract liabilities balances:

	December 31, 2020		December 31, 2019		Year-to-date Change ($)		Year-to-date Change (%)
Contract assets
Accounts receivable, net of allowances	$	200.8	$	191.6	$	9.2	4.8	%
Unbilled contract revenue	79.4		86.1		(6.7)		(7.8)	%
Contract liabilities
Customer advances and billings in excess of contract revenue	$	118.9	$	127.7	$	(8.8)	(6.9)	%
Long-term deferred revenue	1.9		0.8		1.1		137.5	%