SEGMENT INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Segment Reporting Information [Line Items]
Net sales		$ 218.1
Transfers between segments		(218.1)
Net sales to unaffiliated customers	$ 203.3	218.1
Income (loss) from operations	30.4	28.3
Interest income, net	(0.2)	0.0
Other income, net	(0.3)	(0.1)
Income before income taxes	30.9	28.4
Operating Segments
Segment Reporting Information [Line Items]
Net sales	203.3
Transfers between segments	(203.3)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	0.0	0.0
Transfers between segments	0.0	0.0
Automotive
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	153.1	156.3
Income (loss) from operations	35.9	27.3
Automotive | Operating Segments
Segment Reporting Information [Line Items]
Net sales	154.9	156.8
Transfers between segments	(154.9)	(156.8)
Automotive | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	1.8	0.5
Transfers between segments	(1.8)	(0.5)
Interface
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	33.7	44.0
Income (loss) from operations	0.7	7.0
Interface | Operating Segments
Segment Reporting Information [Line Items]
Net sales	34.1	44.6
Transfers between segments	(34.1)	(44.6)
Interface | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	0.4	0.6
Transfers between segments	(0.4)	(0.6)
Power Products
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	16.5	16.2
Income (loss) from operations	3.1	3.0
Power Products | Operating Segments
Segment Reporting Information [Line Items]
Net sales	16.5	16.3
Transfers between segments	(16.5)	(16.3)
Power Products | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	0.0	0.1
Transfers between segments	0.0	(0.1)
Other
Segment Reporting Information [Line Items]
Net sales to unaffiliated customers	0.0	1.6
Income (loss) from operations	(2.3)	(1.9)
Other | Operating Segments
Segment Reporting Information [Line Items]
Net sales	0.1	1.6
Transfers between segments	(0.1)	(1.6)
Other | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	0.1	0.0
Transfers between segments	(0.1)	0.0
Eliminations/Corporate
Segment Reporting Information [Line Items]
Net sales	(2.3)	(1.2)
Transfers between segments	2.3	1.2
Net sales to unaffiliated customers	0.0	0.0
Income (loss) from operations	(7.0)	(7.1)
Eliminations/Corporate | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	(2.3)	(1.2)
Transfers between segments	$ 2.3	$ 1.2