CONTINGENCIES (Details) $ in Millions		3 Months Ended			6 Months Ended	12 Months Ended
	Jan. 27, 2014 USD ($) defendant	Nov. 23, 2014 USD ($)	Aug. 24, 2014 USD ($)	May. 25, 2014 USD ($)	Nov. 29, 2015 USD ($) site	May. 26, 2013 USD ($)	May. 27, 2012 USD ($)	May. 31, 2015 USD ($)
Guarantor Obligations [Line Items]
Face value of federal income tax credits					$ 26.7
Accrual reduction		$ 1.2	$ 5.8	$ 6.7
Liabilities					$ 12,479.9			$ 12,932.2
Contingent put options general exercise period					30 days
Loss on lease put option
Guarantor Obligations [Line Items]
Estimate of possible loss					$ 58.5
Accrued put cost					$ 5.6
Lamb-Weston/Meijer, V.O.F.
Guarantor Obligations [Line Items]
Ownership interest (as percent)					50.00%
Liabilities					$ 143.5			129.1
Partners' equity					278.7			$ 255.9
Investigation By The U.S. Attorney's Office In Georgia And The Consumer Protection Branch Of The Department Of Justice [Member]
Guarantor Obligations [Line Items]
Dispute coverage charge with insurance carrier						$ 7.5	$ 17.5
Pending litigation
Guarantor Obligations [Line Items]
Estimate of possible loss					$ 11.2
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					$ 53.5
Maximum period expected for disbursements on environmental matters					18 years
Beatrice | California
Guarantor Obligations [Line Items]
Other defendants | defendant	2
Expected decision from court	$ 1,150.0
Potato supply agreement guarantee
Guarantor Obligations [Line Items]
Amount of supplier loans effectively guaranteed					$ 29.1