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Restructuring - Schedule of Restructuring Costs by Reportable Segment (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Oct. 31, 2020	Oct. 31, 2020	May 02, 2020	Oct. 26, 2019	Oct. 31, 2020	Oct. 26, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring Costs	$ 2.8	$ 4.2	$ 0.2	$ 0.5	$ 7.6	$ 0.5
Auto
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		3.9		0.2	5.9	0.2
Auto
Restructuring Cost And Reserve [Line Items]
Restructuring Costs		$ 0.3		0.2	0.9	0.2
Auto
Restructuring Cost And Reserve [Line Items]
Restructuring Costs					0.7
Auto
Restructuring Cost And Reserve [Line Items]
Restructuring Costs				$ 0.1		$ 0.1
Eliminations/Corporate [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Costs					$ 0.1

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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