CONTINGENCIES (Details) $ in Millions			3 Months Ended			9 Months Ended	12 Months Ended
	Mar. 25, 2016 USD ($)	Jan. 27, 2014 USD ($) defendant	Feb. 22, 2015 USD ($)	Aug. 24, 2014 USD ($)	May. 25, 2014 USD ($)	Feb. 28, 2016 USD ($) 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						$ 9,454.7			$ 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						$ 7.5
Lamb-Weston/Meijer, V.O.F.
Guarantor Obligations [Line Items]
Ownership interest (as percent)						50.00%
Liabilities						$ 149.4			129.1
Partners' equity						264.4			$ 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						$ 52.8
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						$ 11.5
Subsequent event | Judicial ruling
Guarantor Obligations [Line Items]
Loss Contingency, Damages Awarded, Value	$ 108.9