XML 77 R44.htm IDEA: XBRL DOCUMENT v3.25.1

Debt - Schedule of Other Significant Noncash Transactions (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Other Significant Noncash Transactions [Line Items]
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 11.3
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ (11.3)

X

- Definition

Derecognition of Finance Lease, Right-of-Use Asset

+ References

No definition available.

+ Details

Name:	fss_DerecognitionOfFinanceLeaseRightOfUseAsset
Namespace Prefix:	fss_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-4

+ Details

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