Note 11 - Segment Reporting - Long-lived Assets By Country (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Total long-lived assets	$ 3,393.9	$ 3,430.1
UNITED STATES
Total long-lived assets	2,255.0	2,278.4
UNITED KINGDOM
Total long-lived assets	669.2	659.8
Other Countries [Member]
Total long-lived assets	$ 469.7	$ 491.9

Amount of long-lived asset, excluding financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant