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Goodwill and Intangible Assets - Narratives (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	$ 129.0		$ 129.0
Amortization expense	8.8	$ 14.0
Cryo Tank Solutions
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	23.5		23.5
Heat Transfer Systems
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	49.3		49.3
Specialty Products
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	35.8		35.8
Repair, Service & Leasing
Finite-Lived Intangible Assets
Accumulated goodwill impairment loss	$ 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

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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