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Goodwill and Intangible Assets - Schedule of Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Goodwill [Roll Forward]
Beginning balance	$ 59.2	$ 1.6	$ 1.7
Foreign Currency Translation	(1.2)	0.4	(0.1)
Acquisitions	175.3	57.2
Ending balance	233.3	59.2	1.6
Automotive
Goodwill [Roll Forward]
Beginning balance	57.5	0.0	0.0
Foreign Currency Translation	(0.6)	0.3	0.0
Acquisitions	49.4	57.2
Ending balance	106.3	57.5	0.0
Industrial
Goodwill [Roll Forward]
Beginning balance	1.7	1.6	1.7
Foreign Currency Translation	(0.6)	0.1	(0.1)
Acquisitions	125.9	0.0
Ending balance	$ 127.0	$ 1.7	$ 1.6

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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