CONTINGENCIES (Details)			3 Months Ended				12 Months Ended
	Mar. 25, 2016 USD ($)	Jan. 27, 2014 USD ($) defendant	Aug. 28, 2016 USD ($) site	Nov. 23, 2014 USD ($)	Aug. 24, 2014 USD ($)	May 25, 2014 USD ($)	May 26, 2013 USD ($)	May 27, 2012 USD ($)	May 29, 2016 USD ($)
Guarantor Obligations [Line Items]
Face value of federal income tax credits			$ 26,700,000
Accrual reduction				$ 1,200,000	$ 5,800,000	$ 6,700,000
Total liabilities of Lamb Weston Meijer			$ 9,036,300,000						$ 9,595,800,000
Contingent put options, general exercise period			30 days
Loss on lease put option
Guarantor Obligations [Line Items]
Estimate of possible loss			$ 58,500,000
Contingent put options, general exercise period			30 days
Accrued put cost			$ 11,100,000
Lamb Weston Meijer
Guarantor Obligations [Line Items]
Ownership interest (as percent)			50.00%
Total liabilities of Lamb Weston Meijer			$ 198,600,000						203,700,000
Partners' equity			285,900,000						$ 284,500,000
Investigation By The U.S. Attorney's Office In Georgia
Guarantor Obligations [Line Items]
Dispute coverage charge with insurance carrier							$ 7,500,000	$ 17,500,000
Pending litigation
Guarantor Obligations [Line Items]
Estimate of possible loss			$ 11,200,000
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			37
Number of sites under environmental matters for which acquired company is making payments | site			33
Reserves for Beatrice environmental matters			$ 54,300,000
Maximum period expected for disbursements on environmental matters			18 years
Beatrice | California
Guarantor Obligations [Line Items]
Number of other defendants | defendant		2
Estimate of possible loss		$ 1,150,000,000.00
Potato supply agreement guarantee
Guarantor Obligations [Line Items]
Amount of supplier loans effectively guaranteed			$ 67,900,000