SEGMENT INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended
Jul. 30, 2016	Aug. 01, 2015
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	$ 191.9	$ 203.3
Income (loss) from operations	26.7	30.4
Interest income, net	0.0	(0.2)
Other income, net	0.0	(0.3)
Income before income taxes	26.7	30.9
Operating Segments
Segment Reporting Information [Line Items]
Net sales	(191.8)	(203.3)
Transfers between segments
Segment Reporting Information [Line Items]
Net sales	0.1	0.0
Automotive
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	147.1	153.1
Income (loss) from operations	36.1	35.9
Automotive \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	(148.6)	(154.9)
Automotive \| Transfers between segments
Segment Reporting Information [Line Items]
Net sales	(1.5)	(1.8)
Interface
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	32.9	33.7
Income (loss) from operations	(0.7)	0.7
Interface \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	(33.1)	(34.1)
Interface \| Transfers between segments
Segment Reporting Information [Line Items]
Net sales	(0.2)	(0.4)
Power Products
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	12.0	16.5
Income (loss) from operations	2.5	3.1
Power Products \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	(12.1)	(16.5)
Power Products \| Transfers between segments
Segment Reporting Information [Line Items]
Net sales	(0.1)	0.0
Other
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	0.1	0.0
Income (loss) from operations	(2.3)	(2.3)
Other \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	(0.4)	(0.1)
Other \| Transfers between segments
Segment Reporting Information [Line Items]
Net sales	(0.3)	(0.1)
Eliminations/Corporate
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	(0.2)	0.0
Income (loss) from operations	(8.9)	(7.0)
Eliminations/Corporate \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	2.4	2.3
Eliminations/Corporate \| Transfers between segments
Segment Reporting Information [Line Items]
Net sales	$ 2.2	$ 2.3

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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