XML 57 R36.htm IDEA: XBRL DOCUMENT v3.25.0.1

Note 7 - Property, Equipment and Software (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Schedule of Depreciation Expense [Table Text Block]

​		Year ended December 31,
​		2024				2023				2022
Depreciation expense		$	17.4			$	18.4			$	21.6

 ​

Property, Plant and Equipment [Table Text Block]

​	​	Depreciation		December 31,
​		period		2024				2023
Furniture, fixtures and computer equipment		3 - 5 years		$	53.0			$	50.1
Leasehold improvements		Over the shorter of the useful life or the lease term			53.7				47.7
Computer software	​	3 years			95.2				103.3
Property, equipment and software, gross	​	​		$	201.9			$	201.1
Accumulated depreciation	​	​			(162.5	)			(156.9	)
Property, equipment and software, net	​	​		$	39.4			$	44.2

X

- Definition

Tabular disclosure for schedule of depreciation expense.

+ References

No definition available.

+ Details

Name:	jhg_ScheduleOfDepreciationExpenseTableTextBlock
Namespace Prefix:	jhg_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_TableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration