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Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 1,090.8	$ 1,001.0	$ 1,137.6
Sales Channel, Directly to Consumer [Member]
Net sales	692.4	664.9	750.9
Sales Channel, Through Intermediary [Member]
Net sales	398.4	336.1	386.7
Equipment Sales [Member]
Net sales	679.9	629.7	741.8
Parts and Consumables [Member]
Net sales	249.3	205.8	221.9
Specialty Service Coatings [Member]
Net sales	1.5	22.7	25.7
Service and Other [Member]
Net sales	160.1	142.8	148.2
Americas [Member]
Net sales	658.3	631.0	722.4
EMEA [Member]
Net sales	331.9	278.2	307.6
Asia Pacific [Member]
Net sales	$ 100.6	$ 91.8	$ 107.6

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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