Goodwill and Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
May 26, 2019	May 27, 2018	May 28, 2017
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 76,742,000	$ 54,510,000	$ 54,510,000
Amortization expense related to finite-lived intangible assets	1,500,000	$ 1,000,000	$ 900,000
Amortization expense, next year	1,900,000
Amortization expense, year two	1,900,000.0
Amortization expense, year three	1,900,000.0
Amortization expense, year four	1,900,000.0
Amortization expense, year five	1,900,000.0
Curation Foods
Indefinite-lived Intangible Assets [Line Items]
Goodwill	62,800,000
Lifecore
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 13,900,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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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.

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