RESTRUCTURING ACTIVITIES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		15 Months Ended	19 Months Ended	27 Months Ended
	Aug. 24, 2014	Aug. 25, 2013	Aug. 24, 2014	Aug. 24, 2014	Aug. 24, 2014
SCAE Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Approved Cost					$ 325.0
Restructuring and Related Cost, Incurred Cost	21.1	7.3
Restructuring and Related Cost, Expected Cost					219.2
Restructuring And Related Cost Expected Cash Outflows	9.9			99.0	165.9
Restructuring And Related Cost Expected Noncash Charges	11.2		53.3	34.2
Acquisition Related Restructuring
Restructuring Cost and Reserve [Line Items]
Restructured and related cost incurred to date				23.6
Acquisition Related Restructuring | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.2	0.9
Restructured and related cost incurred to date				21.1
Acquisition Related Restructuring | Corporate
Restructuring Cost and Reserve [Line Items]
Restructured and related cost incurred to date				2.5
Ralcorp Pre-acquisition Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		1.3
Restructuring And Related Cost Expected Cash Outflows	1.9
Restructuring And Related Cost Expected Noncash Charges	1.8
Restructured and related cost incurred to date				3.7
Ralcorp Pre-acquisition Restructuring | Corporate
Restructuring Cost and Reserve [Line Items]
Restructured and related cost incurred to date				0.2
Ralcorp Pre-acquisition Restructuring | Private Brands
Restructuring Cost and Reserve [Line Items]
Restructured and related cost incurred to date				$ 3.5