Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) $ in Millions	9 Months Ended
	Feb. 25, 2018 USD ($)
Goodwill [Line Items]
Beginning balance	$ 8,747.2
Other activity, primarily foreign currency translation	120.1
Ending balance	8,867.3
North America Retail [Member]
Goodwill [Line Items]
Beginning balance	6,406.5
Other activity, primarily foreign currency translation	7.3
Ending balance	6,413.8
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	700.8
Other activity, primarily foreign currency translation	68.4
Ending balance	769.2
Asia & Latin America [Member]
Goodwill [Line Items]
Beginning balance	312.4
Other activity, primarily foreign currency translation	3.8
Ending balance	316.2
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	408.7
Other activity, primarily foreign currency translation	40.6
Ending balance	$ 449.3