GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS (Change in Carrying Amount of Goodwill) (Details) $ in Millions	9 Months Ended
	Feb. 28, 2016 USD ($)
Goodwill [Roll Forward]
Balance as of beginning of period	$ 4,699.5
Currency translation	(17.3)
Balance as of end of period	4,682.2
Consumer Foods | Reporting segments
Goodwill [Roll Forward]
Balance as of beginning of period	3,824.6
Currency translation	(16.2)
Balance as of end of period	3,808.4
Commercial Foods | Reporting segments
Goodwill [Roll Forward]
Balance as of beginning of period	874.9
Currency translation	(1.1)
Balance as of end of period	$ 873.8