v3.25.2

Goodwill and Other Intangible Assets - Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 193.6	$ 172.9
Accumulated Amortization	(94.6)	(85.6)
Net Carrying Value	99.0	87.3
Indefinite-lived intangible assets	123.5	112.4
Total intangible assets, gross carrying value	317.1	285.3
Total intangible assets, net	$ 222.5	199.7
Finite-lived intangible asset, useful life	11 years
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 119.2	108.1
Distribution Rights
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	4.3	4.3
Customer Relationships [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Value	182.8	165.7
Accumulated Amortization	(89.0)	(80.7)
Net Carrying Value	$ 93.8	85.0
Finite-lived intangible asset, useful life	11 years
Other
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 10.8	7.2
Accumulated Amortization	(5.6)	(4.9)
Net Carrying Value	$ 5.2	$ 2.3
Finite-lived intangible asset, useful life	6 years

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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FEDERAL SIGNAL CORP /DE/ 10-Q