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Balance Sheet Components - Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Oct. 31, 2020	May 02, 2020	Oct. 26, 2019	Oct. 31, 2020	Oct. 26, 2019
Property Plant And Equipment [Line Items]
Depreciation	$ 7.6		$ 7.2	$ 15.0	$ 14.2
Capital expenditures recorded in accounts payable		$ 5.8		$ 0.7
Minimum | Buildings and Building Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life				5 years
Minimum | Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life				3 years
Maximum | Buildings and Building Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life				40 years
Maximum | Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life				15 years

X

- Definition

Future cash outflow to pay for purchases of fixed assets that have occurred.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586

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-Topic 230
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-Topic 230
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-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

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X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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X

- 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

No definition available.

+ Details

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X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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