RESTRUCTURING (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended				3 Months Ended	9 Months Ended	12 Months Ended				3 Months Ended			9 Months Ended		13 Months Ended
	Feb. 23, 2014 SCAE Plan [Member]	Feb. 23, 2014 Ralcorp Pre-acquisition Restructuring	Feb. 24, 2013 Ralcorp Pre-acquisition Restructuring	Feb. 23, 2014 Ralcorp Pre-acquisition Restructuring	Feb. 24, 2013 Ralcorp Pre-acquisition Restructuring	Feb. 24, 2013 Network Optimization Plan	Feb. 24, 2013 Network Optimization Plan	May 26, 2013 Network Optimization Plan	May 26, 2013 Network Optimization Plan Consumer Foods	May 26, 2013 Network Optimization Plan Corporate, Non-Segment [Member]	May 26, 2013 Network Optimization Plan Commercial Foods	Feb. 24, 2013 Administrative Efficiency Restructuring Plan	Feb. 24, 2013 Administrative Efficiency Restructuring Plan	May 26, 2013 Administrative Efficiency Restructuring Plan	May 26, 2013 Administrative Efficiency Restructuring Plan Consumer Foods	May 26, 2013 Administrative Efficiency Restructuring Plan Corporate, Non-Segment [Member]	May 26, 2013 Administrative Efficiency Restructuring Plan Commercial Foods	Feb. 23, 2014 Acquisition Related Restructuring	Feb. 23, 2014 Acquisition Related Restructuring Consumer Foods	Feb. 24, 2013 Acquisition Related Restructuring Consumer Foods	Feb. 23, 2014 Acquisition Related Restructuring Consumer Foods	Feb. 24, 2013 Acquisition Related Restructuring Consumer Foods	Feb. 23, 2014 Acquisition Related Restructuring Consumer Foods	Feb. 23, 2014 Acquisition Related Restructuring Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructured and related cost incurred to date		$ 4.4						$ 76.7	$ 59.9	$ 0.8	$ 16.0			$ 18.7	$ 13.8	$ 3.9	$ 1.0	$ 19.7					$ 17.2	$ 2.5
Restructuring and Related Cost, Incurred Cost		0.5	0.7	3.1	0.7	0.3	4.2					0.3	1.8						2.4	4.4	5.7	8.4
Restructuring and Related Cost, Expected Cost	280.0	4.6
Restructuring And Related Cost Expected Cash Outflows	254.5	2.8
Restructuring And Related Cost Expected Noncash Charges	$ 25.5	$ 1.8