BUSINESS SEGMENTS AND RELATED INFORMATION (Net Sales by Product) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	May 25, 2014	Feb. 23, 2014	Nov. 24, 2013	Aug. 25, 2013	May 26, 2013	Feb. 24, 2013	Nov. 25, 2012	Aug. 26, 2012	May 25, 2014	May 26, 2013	May 27, 2012
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net	$ 4,436.8	$ 4,389.7	$ 4,695.3	$ 4,180.8	$ 4,563.3	$ 3,833.8	$ 3,727.2	$ 3,302.3	$ 17,702.6	$ 15,426.6	$ 13,331.1
Consumer Foods
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									7,315.5	7,551.4	6,945.8
Consumer Foods | Grocery
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									2,829.7	2,980.3	2,967.0
Consumer Foods | Frozen
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									2,241.9	2,295.5	1,929.8
Consumer Foods | International
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									1,061.2	1,073.7	839.3
Consumer Foods | Other Brands
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									115.4	88.8	83.6
Consumer Foods | Snacks
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									1,067.3	1,113.1	1,126.1
Commercial Foods
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									6,191.2	6,067.0	5,747.0
Commercial Foods | Specialty Potatoes
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									2,792.7	2,753.1	2,631.0
Commercial Foods | Milled Products
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									1,859.0	1,957.3	1,910.2
Commercial Foods | Foodservice and Flavors [Domain]
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									876.7	891.4	842.3
Commercial Foods | Frozen Bakery and Ingredient Distribution [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									662.8	465.2	363.5
Private Brands
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									4,195.9	1,808.2	638.3
Private Brands | Snacks
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									1,373.0	542.0	91.4
Private Brands | Retail Bakery
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									772.5	234.6
Private Brands | Bars and coordinated
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									679.5	535.2	513.5
Private Brands | Pasta
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									564.3	192.9
Private Brands | Cereal
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									497.1	191.6	33.4
Private Brands | Condiments
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net									309.5	111.9
Ralcorp | Pasta
Segment Reporting Information [Line Items]
Sales Revenue, Goods, Net											$ 0