Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) $ in Millions	9 Months Ended
	Feb. 24, 2019 USD ($)
Goodwill [Line Items]
Beginning balance	$ 14,065.0
Other activity, primarily foreign currency translation	(39.2)
Ending balance	14,025.8
North America Retail [Member]
Goodwill [Line Items]
Beginning balance	6,410.6
Other activity, primarily foreign currency translation	(1.4)
Ending balance	6,409.2
Pet [Member]
Goodwill [Line Items]
Beginning balance	5,294.9
Other activity, primarily foreign currency translation	0.0
Ending balance	5,294.9
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	729.9
Other activity, primarily foreign currency translation	(19.1)
Ending balance	710.8
Asia & Latin America [Member]
Goodwill [Line Items]
Beginning balance	285.0
Other activity, primarily foreign currency translation	(7.1)
Ending balance	277.9
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	425.8
Other activity, primarily foreign currency translation	(11.6)
Ending balance	$ 414.2