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Goodwill and Intangible Assets - Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill
Beginning balance, goodwill	$ 865.9
Goodwill acquired during the period	95.1
Foreign currency translation adjustments and other	(9.2)
Purchase price adjustments	0.9
Ending balance, goodwill	952.7
L.A. Turbine
Goodwill
Goodwill acquired during the period	42.1
Cryo Tank Solutions
Goodwill
Beginning balance, goodwill	93.2
Goodwill acquired during the period	0.0
Foreign currency translation adjustments and other	(6.1)
Purchase price adjustments	0.0
Ending balance, goodwill	87.1
Heat Transfer Systems
Goodwill
Beginning balance, goodwill	435.2
Goodwill acquired during the period	2.9
Foreign currency translation adjustments and other	(3.3)
Purchase price adjustments	0.0
Ending balance, goodwill	434.8
Heat Transfer Systems | L.A. Turbine
Goodwill
Goodwill acquired during the period	2.9
Specialty Products
Goodwill
Beginning balance, goodwill	172.4
Goodwill acquired during the period	82.1
Foreign currency translation adjustments and other	0.2
Purchase price adjustments	0.9
Ending balance, goodwill	255.6
Specialty Products | L.A. Turbine
Goodwill
Goodwill acquired during the period	29.1
Specialty Products | Cryogenic Technologies
Goodwill
Ending balance, goodwill	34.1
Specialty Products | AdEdge
Goodwill
Ending balance, goodwill	18.9
Repair, Service & Leasing
Goodwill
Beginning balance, goodwill	165.1
Goodwill acquired during the period	10.1
Foreign currency translation adjustments and other	0.0
Purchase price adjustments	0.0
Ending balance, goodwill	175.2
Repair, Service & Leasing | L.A. Turbine
Goodwill
Goodwill acquired during the period	$ 10.1

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