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Stock-based Compensation and Stockholders’ Equity - Weighted Average Assumptions (Details) - $ / shares	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Share-based Payment Arrangement [Abstract]
Options granted (in shares)	435,000	368,264	498,000
Weighted-average exercise price (in dollars per share)	$ 13.05
Weighted-average grant date fair value (in dollars per share)	2.55	$ 2.80	$ 2.90
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in dollars per share)	$ 10.42	$ 11.85	$ 12.93
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	3 years 6 months	3 years 6 months	3 years 6 months
Risk-free interest rate	1.01%	2.47%	1.73%
Volatility	31.00%	27.00%	27.00%
Dividend yield	0.00%	0.00%	0.00%

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average grant-date fair value of options vested.

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