CONTINGENCIES (Details)					3 Months Ended	9 Months Ended
	Sep. 12, 2018 legal_action	Sep. 04, 2018 USD ($)	Mar. 25, 2016 USD ($)	Jan. 27, 2014 USD ($) defendant	Feb. 25, 2018 USD ($) building	Feb. 24, 2019 USD ($) site period	Feb. 25, 2018 USD ($)	May 27, 2018 USD ($)
Guarantor Obligations [Line Items]
Number of buildings purchased that were subject to lease | building					2
Net loss on early exit of unfavorable lease contracts					$ 48,200,000	$ 0	$ 48,200,000
Litigation related to the Pinnacle Merger
Guarantor Obligations [Line Items]
Number of actions consolidated | legal_action	3
Loss on lease put option for one building
Guarantor Obligations [Line Items]
Estimate of possible loss						8,200,000		$ 8,200,000
Amount accrued						$ 1,500,000		$ 1,200,000
Judicial ruling
Guarantor Obligations [Line Items]
Damages awarded to plaintiff			$ 108,900,000
Beatrice
Guarantor Obligations [Line Items]
Number of sites under environmental matters for which acquired company has a liability | site						40
Accrual for environmental matters						$ 53,000,000
Beatrice | California
Guarantor Obligations [Line Items]
Number of other defendants | defendant				2
Estimate of possible loss		$ 409,000,000		$ 1,150,000,000
Timing after which any unspent amounts are to be returned to defendant		4 years
Amount accrued						136,000,000
Warehouse services agreement
Guarantor Obligations [Line Items]
Minimum monthly payment required under warehouse services agreement						1,500,000.0
Liability for estimated fair value of guarantee						27,300,000
Performance and payment guarantee for Lamb Weston
Guarantor Obligations [Line Items]
Guarantee under sublease agreement (maximum)						$ 75,000,000.0
Lamb Weston
Guarantor Obligations [Line Items]
Number of optional extension periods | period						2
Period of optional extensions						5 years