SHARE-BASED PAYMENTS - Stock Option Plan (Narrative) (Details) - USD ($)	12 Months Ended
May 31, 2020	May 26, 2019	May 27, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	0	0	0
Total intrinsic value of options exercised	$ 3,800,000	$ 7,900,000	$ 15,800,000
Closing market price of common stock (in dollars per share)	$ 34.79
Unrecognized compensation expense, net of estimated forfeitures, related to stock options	$ 0
Cash received from option exercises	11,000,000.0	12,400,000	25,100,000
Actual tax benefit realized for tax deductions from option exercises	$ 1,400,000	2,300,000	5,300,000
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Compensation expense (income)	$ 200,000	2,200,000	4,200,000
Tax benefit	$ 100,000	500,000	1,400,000
Options \| Subsidiary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense (income)		$ 200,000	$ 400,000
Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period of options	7 years
Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period of options	10 years

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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

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Price of a single share of a number of saleable stocks of a company.

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