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Changes in Carrying Amount of Goodwill and Trade Names (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 273.8us-gaap_Goodwill		$ 272.3us-gaap_Goodwill
Translation adjustments	(7.5)us-gaap_GoodwillTranslationAdjustments	1.5us-gaap_GoodwillTranslationAdjustments
Goodwill Ending balance	266.3us-gaap_Goodwill	273.8us-gaap_Goodwill	272.3us-gaap_Goodwill
Environmental Solutions
Goodwill [Roll Forward]
Goodwill, Beginning balance	120.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember		120.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember
Translation adjustments	0us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember	0us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember
Goodwill Ending balance	120.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember	120.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember	120.4us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_EnvironmentalSolutionsMember
Fire Rescue
Goodwill [Roll Forward]
Goodwill, Beginning balance	33.8us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember		33.8us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember
Translation adjustments	(2.7)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember	0us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember
Goodwill Ending balance	31.1us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember	33.8us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember	33.8us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_FireRescueMember
Safety And Security Systems
Goodwill [Roll Forward]
Goodwill, Beginning balance	119.6us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember		118.1us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember
Translation adjustments	(4.8)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember	1.5us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember
Goodwill Ending balance	$ 114.8us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember	$ 119.6us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember	$ 118.1us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = fss_SafetyAndSecuritySystemsMember

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

X

- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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X

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X

- Details

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Period Type:

X

- Details

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Period Type: