Business Segment Information (Schedule of operating segment results) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	May 26, 2013	Feb. 24, 2013	Nov. 25, 2012	Aug. 26, 2012	May 27, 2012	Feb. 26, 2012	Nov. 27, 2011	Aug. 28, 2011	May 26, 2013	May 27, 2012	May 29, 2011
Segment Reporting Information [Line Items]
Net sales	$ 4,410.7	$ 4,430.6	$ 4,881.8	$ 4,051.0	$ 4,066.4	$ 4,120.1	$ 4,623.8	$ 3,847.6	$ 17,774.1	$ 16,657.9	$ 14,880.2
Operating profit									2,851.8	2,562.4	2,774.5
Reportable Segment [Member]
Segment Reporting Information [Line Items]
Net sales									17,774.1	16,657.9	14,880.2
Operating profit									3,197.7	3,011.6	2,945.6
U.S. Retail [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Net sales									10,614.9	10,480.2	10,163.9
Operating profit									2,392.9	2,295.3	2,347.9
International [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Net sales									5,200.2	4,194.3	2,875.5
Operating profit									490.2	429.6	291.4
Bakeries And Foodservice Segment [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Net sales									1,959.0	1,983.4	1,840.8
Operating profit									314.6	286.7	306.3
Unallocated Amount to Segment [Member] | Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating profit									326.1	347.6	184.1
Divestitures (gain) [Member] | Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating profit									0	0	(17.4)
Restructuring Settlement And Impairment Provisions [Member] | Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating profit									$ 19.8	$ 101.6	$ 4.4