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Note 4 - Consolidation - VREs (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Investments	$ 337.1	$ 334.2
Cash and cash equivalents	1,217.2	1,152.4
Other current assets	134.5	174.5
Accounts payable and accrued liabilities	(266.1)	(231.4)
Variable Rights Entity, Primary Beneficiary, Aggregated Disclosure [Member]
Investments	132.5	242.9
Cash and cash equivalents	26.3	6.5
Other current assets	2.7	21.6
Accounts payable and accrued liabilities	(0.9)	(1.1)
Total	160.6	269.9
Redeemable noncontrolling interests in consolidated VREs	(22.7)	(100.9)
JHG’s net interest in consolidated VREs	$ 137.9	$ 169.0

X

- Definition

Portion of equity (net assets) in a voting rights entities (VRE) not attributable, directly or indirectly, to the parent entity. That is, this is the portion of equity in a VRE that is attributable to the redeemable noncontrolling interest (previously referred to as minority interest).

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The net carrying amount of the net interest in consolidated voting rights entities assets and liabilities excluding noncontrolling interest.

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- Definition

The net carrying amount of the Voting Rights Entity's assets and liabilities included in the reporting entity's statement of financial position.

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of current assets classified as other.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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