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Intangible Assets and Goodwill - Narrative - Indefinite-lived Intangibles Excluding Goodwill, Impairment Test (Details) | Apr. 28, 2018 | Apr. 29, 2017 | Apr. 30, 2016
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Indefinite-lived Intangible Assets [Line Items] |  |  |
Percentage by which fair value exceeded carrying value | 44.00% | 28.00% | 17.00%

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- Definition Intangible Assets, Indefinite-lived (Excluding Goodwill), Impairment Test, Excess of Fair Value over Carrying Value, Percentage + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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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 No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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