v3.25.2
Document and Entity Information
 6 Months Ended
Jun. 30, 2025
shares
Cover [Abstract]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Jun. 30, 2025
Document Transition Report false
Entity File Number 1-6003
Entity Registrant Name FEDERAL SIGNAL CORPORATION
Entity Incorporation, State or Country Name DE
Entity Tax Identification Number 36-1063330
Entity Address, Address Line One 1333 Butterfield Road
Entity Address, City or Town Downers Grove
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60515
City Area Code 630
Local Phone Number 954-2000
Title of 12(b) Security Common Stock, par value $1.00 per share
Trading Symbol FSS
Security Exchange Name NYSE
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Common Stock, Shares Outstanding 60,791,897
Entity Shell Company false
Entity Central Index Key 0000277509
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2025
Document Fiscal Period Focus Q2
Amendment Flag false