Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 26, 2012
Goodwill [Line Items]
Beginning balance	$ 8,182.5
Acquisition	15.8
Other activity, primarily foreign currency translation	9.4
Ending balance	8,207.7
U.S. Retail [Member]
Goodwill [Line Items]
Beginning balance	5,813.2
Acquisition	0
Other activity, primarily foreign currency translation	0
Ending balance	5,813.2
International [Member]
Goodwill [Line Items]
Beginning balance	989.9
Acquisition	15.8
Other activity, primarily foreign currency translation	9.5
Ending balance	1,015.2
Bakeries and Foodservice [Member]
Goodwill [Line Items]
Beginning balance	921.1
Acquisition	0
Other activity, primarily foreign currency translation	0
Ending balance	921.1
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	458.3
Acquisition	0
Other activity, primarily foreign currency translation	(0.1)
Ending balance	$ 458.2