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Segment Information (Details Textuals)	Jun. 30, 2011
Segment Information (Textuals) [Abstract]
Number of operating segments	3

X

- Definition

Number of operating segments.

+ Details

Name:	fls_NumberOfOperatingSegments
Namespace Prefix:	fls
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Segment information.

+ Details

Name:	fls_SegmentInformationTextualsAbstract
Namespace Prefix:	fls
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration