GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS - Schedule of the Change in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	May 30, 2021	May 31, 2020
Goodwill
Beginning balance	$ 11,361.5	$ 11,360.6
Purchase accounting adjustments		10.1
Currency translation	12.0	(9.2)
Ending balance	11,373.5	11,361.5
Grocery & Snacks
Goodwill
Beginning balance	4,698.2	4,694.7
Purchase accounting adjustments		3.5
Currency translation	0.0	0.0
Ending balance	4,698.2	4,698.2
Refrigerated & Frozen
Goodwill
Beginning balance	5,625.1	5,619.2
Purchase accounting adjustments		5.9
Currency translation	0.0	0.0
Ending balance	5,625.1	5,625.1
International
Goodwill
Beginning balance	290.5	299.0
Purchase accounting adjustments		0.7
Currency translation	12.0	(9.2)
Ending balance	302.5	290.5
Foodservice
Goodwill
Beginning balance	747.7	747.7
Purchase accounting adjustments		0.0
Currency translation	0.0	0.0
Ending balance	$ 747.7	$ 747.7