Note 4 - Management Actions - Pre-tax Severance Related Charges (Details) - Employee Severance [Member] - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Total pre-tax severance-related costs	$ 0.8	$ 4.1
Selling, General and Administrative Expenses [Member]
Total pre-tax severance-related costs	0.8	3.3
Cost of Sales [Member]
Total pre-tax severance-related costs	$ 0.0	$ 0.8

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Name:	us-gaap_RestructuringCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration