BUSINESS SEGMENTS AND RELATED INFORMATION (Net Derivative Gains (Losses)) (Details) - USD ($) $ in Millions	12 Months Ended
	May 29, 2016	May 31, 2015	May 25, 2014
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	$ 3.6
Consumer Foods
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	(18.9)
Commercial Foods
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	(1.4)
Commodity contracts
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	(12.1)	$ (79.3)	$ 21.2
Commodity contracts | General corporate expenses
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	18.1	(32.7)	22.8
Commodity contracts | Reporting segments
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	(30.2)	(46.6)	(1.6)
Commodity contracts | Consumer Foods
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	(21.1)	(41.9)	(5.9)
Commodity contracts | Commercial Foods
Segment Reporting Information [Line Items]
Net derivative gains (losses) incurred	$ (9.1)	$ (4.7)	$ 4.3