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Note 7 - Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Balance	$ 249.5
Balance, accumulated impairment losses	(41.7)
Balance, net	207.8
Divestitures	(1.7)
Foreign currency fluctuations	(6.9)
Foreign currency fluctuations	0.0
Foreign currency fluctuations	(6.9)
Balance	240.9
Balance, accumulated impairment losses	(41.7)
Balance, net	$ 199.2

X

- Definition

The change to the recorded value of accumulated impairment losses for foreign currency translation adjustments.

+ References

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- Definition

The change to the recorded net goodwill for foreign currency translation adjustments.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-SubTopic 20
-Section 50
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-Subparagraph (f)
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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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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.

+ References

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Amount of divestiture of 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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