Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 01, 2020	Jan. 26, 2019	Feb. 01, 2020	Jan. 26, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 285.9	$ 246.9	$ 813.3	$ 734.3
Income (Loss) from Operations	41.5	26.0	110.8	73.8
Interest Expense, Net	2.4	3.2	8.0	5.0
Other Income, Net	(4.9)	(4.9)	(5.8)	(4.7)
Income before Income Taxes	44.0	27.7	108.6	73.5
Operating Segments
Segment Reporting Information [Line Items]
Net Sales	285.9	246.9	813.3	734.3
Transfers between Segments
Segment Reporting Information [Line Items]
Net Sales	0.0	0.0	0.0	0.0
Automotive
Segment Reporting Information [Line Items]
Net Sales	210.3	172.9	576.6	549.8
Income (Loss) from Operations	39.2	27.0	101.2	96.7
Automotive | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	211.5	174.0	580.3	555.0
Automotive | Transfers between Segments
Segment Reporting Information [Line Items]
Net Sales	(1.2)	(1.1)	(3.7)	(5.2)
Industrial
Segment Reporting Information [Line Items]
Net Sales	60.1	60.2	195.8	139.8
Income (Loss) from Operations	13.2	8.9	44.8	21.1
Industrial | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	60.8	60.9	197.8	141.8
Industrial | Transfers between Segments
Segment Reporting Information [Line Items]
Net Sales	(0.7)	(0.7)	(2.0)	(2.0)
Interface
Segment Reporting Information [Line Items]
Net Sales	14.9	13.7	39.7	44.0
Income (Loss) from Operations	0.7	0.0	0.7	0.2
Interface | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	14.9	13.8	39.8	44.2
Interface | Transfers between Segments
Segment Reporting Information [Line Items]
Net Sales	0.0	(0.1)	(0.1)	(0.2)
Medical
Segment Reporting Information [Line Items]
Net Sales	0.6	0.1	1.2	0.7
Income (Loss) from Operations	(1.6)	(1.7)	(4.9)	(6.3)
Medical | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	0.6	0.1	1.2	0.7
Medical | Transfers between Segments
Segment Reporting Information [Line Items]
Net Sales	0.0	0.0	0.0	0.0
Eliminations/Corporate
Segment Reporting Information [Line Items]
Net Sales	0.0	0.0	0.0	0.0
Income (Loss) from Operations	(10.0)	(8.2)	(31.0)	(37.9)
Eliminations/Corporate | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	(1.9)	(1.9)	(5.8)	(7.4)
Eliminations/Corporate | Transfers between Segments
Segment Reporting Information [Line Items]
Net Sales	$ 1.9	$ 1.9	$ 5.8	$ 7.4