CONTINGENCIES (Details)			12 Months Ended
	Jul. 10, 2019 USD ($) installment	Jan. 27, 2014 USD ($) defendant	May 26, 2019 USD ($) site period	May 27, 2018 USD ($) building	May 28, 2017 USD ($) lease	Sep. 04, 2018 USD ($)
Guarantor Obligations [Line Items]
Number buildings purchased in period | building				2
Aggregate charges for early termination of leases				$ 48,200,000
Number of expired lease agreements | lease					1
Financing lease obligation					$ 6,700,000
Loss on lease put option
Guarantor Obligations [Line Items]
Estimated possible loss			$ 8,200,000	8,200,000
Accrued put cost			$ 1,600,000	$ 1,200,000
Lamb Weston
Guarantor Obligations [Line Items]
Number of extension periods | period			2
Term of optional extension periods			5 years
Beatrice
Guarantor Obligations [Line Items]
Number of sites where Beatrice is a potentially responsible party | site			40
Accrual for Beatrice-related environmental matters			$ 52,800,000
Performance and payment of all amounts under sublease agreement
Guarantor Obligations [Line Items]
Maximum amount guaranteed			$ 19,100,000
Remaining lease terms			8 years
Guarantee to make payments
Guarantor Obligations [Line Items]
Maximum amount guaranteed			$ 1,200,000
Remaining lease terms			4 years
California | Beatrice
Guarantor Obligations [Line Items]
Number of other defendants | defendant		2
Estimated possible loss		$ 1,150,000,000
Minimum | California | Beatrice
Guarantor Obligations [Line Items]
Estimated possible loss						$ 409,000,000
Other accrued liabilities | Minimum | California | Beatrice
Guarantor Obligations [Line Items]
Estimated possible loss			$ 25,300,000
Other noncurrent liabilities | Minimum | California | Beatrice
Guarantor Obligations [Line Items]
Estimated possible loss			74,100,000
Lamb Weston | Performance and payment of all amounts under sublease agreement
Guarantor Obligations [Line Items]
Maximum amount guaranteed			$ 75,000,000.0
Subsequent event | California | Beatrice
Guarantor Obligations [Line Items]
Total payments to be made under settlement	$ 101,700,000
Number of annual installments to be made | installment	7
Subsequent event | Maximum | California | Beatrice
Guarantor Obligations [Line Items]
Estimated possible loss	$ 15,000,000.0