RESTRUCTURING ACTIVITIES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		18 Months Ended	22 Months Ended	30 Months Ended
	Nov. 23, 2014	Nov. 24, 2013	Nov. 23, 2014	Nov. 24, 2013	Nov. 23, 2014	Nov. 23, 2014	Nov. 23, 2014
SCAE Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Approved Cost							$ 325.0
Restructuring and Related Cost, Expected Cost							217.6
Restructuring and Related Cost, Incurred Cost	17.4	7.3	38.5	14.6
Restructuring And Related Cost Expected Cash Outflows	7.5		17.4			106.5	157.1
Restructuring And Related Cost Expected Noncash Charges	9.9		21.1		60.5	44.1
Acquisition Related Restructuring
Restructuring Cost and Reserve [Line Items]
Restructured and related cost incurred to date						23.7
Acquisition Related Restructuring | Consumer Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0.1	2.4	0.3	3.3
Restructured and related cost incurred to date						21.2
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		2.6
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