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Goodwill and Intangible Assets - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	$ 129.0		$ 129.0		$ 129.0
Amortization expense	9.6	$ 14.0	18.4	$ 28.0
Cryo Tank Solutions
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	23.5		23.5		23.5
Heat Transfer Systems
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	49.3		49.3		49.3
Specialty Products
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	35.8		35.8		35.8
Repair, Service & Leasing
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	$ 20.4		$ 20.4		$ 20.4
Government grants \| Minimum
Finite-Lived Intangible Assets
Finite lived intangible assets useful life (in years)			10 years
Government grants \| Maximum
Finite-Lived Intangible Assets
Finite lived intangible assets useful life (in years)			50 years