Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	May 29, 2016	May 31, 2015	May 25, 2014
Goodwill [Line Items]
Beginning balance	$ 8,874.9	$ 8,650.5	$ 8,622.2
Acquisitions	83.5	589.8
Divestitures	(186.4)		(12.2)
Other activity, primarily foreign currency translation	(30.8)	(365.4)	40.5
Ending balance	8,741.2	8,874.9	8,650.5
U S Retail [Member]
Goodwill [Line Items]
Beginning balance	6,419.0	5,829.2	5,841.4
Acquisitions	54.1	589.8
Divestitures	(180.2)		(12.2)
Other activity, primarily foreign currency translation	0.0	0.0	0.0
Ending balance	6,292.9	6,419.0	5,829.2
International [Member]
Goodwill [Line Items]
Beginning balance	1,133.3	1,402.0	1,387.0
Acquisitions	29.4	0.0
Divestitures	(6.2)		0.0
Other activity, primarily foreign currency translation	(35.5)	(268.7)	15.0
Ending balance	1,121.0	1,133.3	1,402.0
Convenience Stores and Foodservice [Member]
Goodwill [Line Items]
Beginning balance	921.1	921.1	921.1
Acquisitions	0.0	0.0
Divestitures	0.0		0.0
Other activity, primarily foreign currency translation	0.0	0.0	0.0
Ending balance	921.1	921.1	921.1
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	401.5	498.2	472.7
Acquisitions	0.0	0.0
Divestitures	0.0		0.0
Other activity, primarily foreign currency translation	4.7	(96.7)	25.5
Ending balance	$ 406.2	$ 401.5	$ 498.2