CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended		12 Months Ended		30 Months Ended		3 Months Ended			9 Months Ended			9 Months Ended	0 Months Ended	3 Months Ended	1 Months Ended
	Feb. 24, 2013	Aug. 26, 2012	May 27, 2012	Feb. 24, 2013 hog	Feb. 26, 2012	May 27, 2012	May 31, 2009	Nov. 25, 2012	May 31, 2012	Aug. 26, 2012 Litigation Matter [Member]	Aug. 26, 2012 Compensatory Damages [Member]	Aug. 26, 2012 Punitive Damages [Member]	Feb. 24, 2013 Beatrice [Member] site	Feb. 24, 2013 Potato Supply Agreement Guarantee [Member]	Feb. 24, 2013 Onion Supply Agreement Guarantee [Member]	Feb. 24, 2013 Leases and Other Commercial Obligations Guarantee [Member]	Mar. 26, 2013 Employee Collectibility [Member] Subsidiary of Ralcorp [Member] case employee	Aug. 26, 2012 Threatened Litigation [Member] Damage from Fire, Explosion or Other Hazard [Member] employee	Apr. 30, 2010 Subcontractor [Member] Pending Litigation [Member] Damage from Fire, Explosion or Other Hazard [Member] employee	Apr. 30, 2010 Primary Contractor [Member] Pending Litigation [Member] Damage from Fire, Explosion or Other Hazard [Member] employee	Nov. 25, 2012 Diacetyl [Member] Damages to Health [Member] case
Guarantor Obligations [Line Items]
Number of sites under environmental matters for which acquired company has a liability													36
Number of sites under environmental matters for which acquired company is making payments													32
Reserves for Beatrice environmental matters													$ 63.6
Maximum period expected for disbursements on environmental matters													18 years
Maximum period of guarantee																3 years
Guarantee obligation under purchase agreement															25.0	8.8
Minimum quantity of hogs to be purchased under hog purchase agreement through 2014				1,200,000
Amount of supplier loans effectively guaranteed														7.2
Loan purchase under agreement			40.8			40.8
Asset impairment charges	10.2			19.8	7.9
Face value of federal income tax credits	21.2			21.2
Dispute coverage charge with insurance carrier						17.5	24.8			7.5
Favorable claim related to defense cost			11.8	1.4
Favorable claim for disputed coverage			25.0
Pre-Judgment interest								4.7
Loss Contingency, Number of Plaintiffs																		3	2	1
Unfavorable verdict											77.5	100.0
Punitive award against the company		7
Damages accrued in prior period									$ 3
Litigation Settlement, Expense																					3
Loss Contingency, New Claims Filed, Number																	3
Number of Subsidiaries																	2