Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) $ in Millions	3 Months Ended
	Aug. 26, 2018 USD ($)
Goodwill [Line Items]
Beginning balance	$ 14,065.0
Other activity, primarily foreign currency translation	(34.6)
Ending balance	14,030.4
North America Retail [Member]
Goodwill [Line Items]
Beginning balance	6,410.6
Other activity, primarily foreign currency translation	(0.5)
Ending balance	6,410.1
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	(6.6)
Ending balance	723.3
Asia & Latin America [Member]
Goodwill [Line Items]
Beginning balance	285.0
Other activity, primarily foreign currency translation	(26.4)
Ending balance	258.6
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	425.8
Other activity, primarily foreign currency translation	(1.1)
Ending balance	$ 424.7