STOCK-BASED COMPENSATION - Stock Option Activity (Details) - Stock options $ / shares in Units, $ in Millions	3 Months Ended
Aug. 26, 2018 USD ($) $ / shares shares
Shares
Outstanding at beginning of the period (in shares) \| shares	651,606
Exercised (in shares) \| shares	(25,522)
Forfeited/cancelled (in shares) \| shares	(408)
Outstanding at end of the period (in shares) \| shares	625,676
Weighted-Average Exercise Price (per share)
Outstanding at beginning of the period (in dollars per share) \| $ / shares	$ 29.08
Exercised (in dollars per share) \| $ / shares	28.73
Forfeited/cancelled (in dollars per share) \| $ / shares	30.67
Outstanding at end of the period (in dollars per share) \| $ / shares	$ 29.09
Additional information
Weighted-Average Remaining Contractual Term - Outstanding (in years)	7 years
Aggregate Intrinsic Value - Outstanding \| $	$ 23.7
Shares - Exercisable at end of year (in shares) \| shares	480,847
Weighted-Average Exercise Price - Exercisable (in dollars per share) \| $ / shares	$ 27.31
Weighted-Average Remaining Contractual Term - Exercisable (in years)	6 years 8 months 12 days
Aggregate Intrinsic Value - Exercisable \| $	$ 19.1

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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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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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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