XML 156 R101.htm IDEA: XBRL DOCUMENT v3.25.0.1

Segment Information - Schedule of Capital Expenditures by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Capital Expenditures by Segment [Line Items]
Segment, Expenditure, Addition to Long-Lived Assets	$ 40.6	$ 30.3	$ 53.0
Operating Segments
Schedule of Capital Expenditures by Segment [Line Items]
Segment, Expenditure, Addition to Long-Lived Assets	37.7	28.2	51.8
Environmental Solutions
Schedule of Capital Expenditures by Segment [Line Items]
Segment, Expenditure, Addition to Long-Lived Assets	31.6	23.0	19.4
Safety And Security Systems
Schedule of Capital Expenditures by Segment [Line Items]
Segment, Expenditure, Addition to Long-Lived Assets	6.1	5.2	32.4
Corporate
Schedule of Capital Expenditures by Segment [Line Items]
Segment, Expenditure, Addition to Long-Lived Assets	$ 2.9	$ 2.1	$ 1.2

X

- Definition

Schedule of Capital Expenditures by Segment [Line Items]

+ References

No definition available.

+ Details

Name:	fss_ScheduleOfCapitalExpendituresBySegmentLineItems
Namespace Prefix:	fss_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of expenditure for addition to long-lived assets included in determination of segment assets by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Excludes expenditure for addition to financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-25

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482785/280-10-55-48

+ Details

Name:	us-gaap_SegmentExpenditureAdditionToLongLivedAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=fss_EnvironmentalSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=fss_SafetyAndSecuritySystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: