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Note 8 - Goodwill and Intangible Assets - Summary of Changes in Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill	$ 1,676.0
Goodwill	1,731.8
Insurance [Member]
Goodwill	1,676.0
Goodwill, Acquired During Period	56.4	[1]
Purchase accounting reclassifications	(0.1)
Foreign currency translation adjustment	(0.5)
Goodwill	$ 1,731.8
[1] This adjustment relates to a segment reclassification; refer to Note 19. Segment Reporting

X

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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.

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