Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) $ in Millions	9 Months Ended
	Feb. 23, 2020 USD ($)
Goodwill [Line Items]
Beginning balance	$ 13,995.8
Other activity, primarily foreign currency translation	(45.0)
Ending balance	13,950.8
North America Retail [Member]
Goodwill [Line Items]
Beginning balance	6,406.5
Other activity, primarily foreign currency translation	1.9
Ending balance	6,408.4
Pet [Member]
Goodwill [Line Items]
Beginning balance	5,300.5
Other activity, primarily foreign currency translation	0.0
Ending balance	5,300.5
Convenience Stores & Foodservice [Member]
Goodwill [Line Items]
Beginning balance	918.8
Other activity, primarily foreign currency translation	0.0
Ending balance	918.8
Europe & Australia [Member]
Goodwill [Line Items]
Beginning balance	700.4
Other activity, primarily foreign currency translation	(15.4)
Ending balance	685.0
Asia & Latin America [Member]
Goodwill [Line Items]
Beginning balance	260.2
Other activity, primarily foreign currency translation	(18.5)
Ending balance	241.7
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	409.4
Other activity, primarily foreign currency translation	(13.0)
Ending balance	$ 396.4