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CONTINGENCIES (Details) $ in Millions			12 Months Ended
	Mar. 04, 2016 USD ($)	Feb. 01, 2016 USD ($) project	Jan. 31, 2018 USD ($)	Jan. 31, 2017 USD ($)
GPS
Loss Contingencies
Amount of damages sought by plaintiff			$ 11.0
Outstanding surety bonds			$ 11.1	$ 7.3
Minimum
Loss Contingencies
Warranty period			9 months
Maximum
Loss Contingencies
Warranty period			24 months
PPS Engineers, Inc. claims lawsuit | Pending Litigation
Loss Contingencies
Amount of damages sought by plaintiff		$ 2.3
Number of significant project locations involved in the lawsuit | project		1
Damages sought against bond of the project		$ 2.5
Counter claim amount sought	$ 2.2

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The amount of outstanding surety bonds.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 450
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-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 450
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-Section 50
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