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Note 10 - Noncontrolling Interests - Schedule of Changes in Noncontrolling Interests (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Opening balance | $ 744.7 | $ 346.7 | $ 365.0 | $ 317.2
Changes in market value | 39.0 | 22.7 | 72.4 | 37.0
Changes in ownership | 11.9 | 116.9 | 324.5 | 132.8
Foreign currency translation | (24.3) | 7.2 | 9.4 | 6.5
Closing balance | $ 771.3 | $ 493.5 | $ 771.3 | $ 493.5

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- Definition Represents the change in value of redeemable minority interest due to change in market value of seeded investment products. + References No definition available. + Details
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- Definition Represents the change in value of redeemable minority interest due to change in ownership of seeded investment products. + References No definition available. + Details
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- Definition Represents the change in value of redeemable minority interest due to foreign currency translation adjustments of seeded investment products. + References No definition available. + Details
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- Definition The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479857/480-10-S50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479887/480-10-S45-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3A -Subparagraph (24) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-3A + Details
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