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Summary of Carrying Amount and Fair Value of Financial Instruments (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long term debt and capital lease obligations	$ 4.7	$ 0.1
Financial service borrowings		$ 0.9

X

- Details

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Period Type:	duration

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- Definition

Discontinued operations, financial service borrowings.

+ References

No definition available.

+ Details

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Namespace Prefix:	fss_
Data Type:	xbrli:monetaryItemType
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- Definition

Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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