Business Segment Information (Schedule of operating segment results) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 24, 2013	Feb. 26, 2012	Feb. 24, 2013	Feb. 26, 2012
Segment Reporting Information [Line Items]
Net sales	$ 4,430.6	$ 4,120.1	$ 13,363.4	$ 12,591.5
Operating profit	642.1	668.6	2,251.2	2,024.4
Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	748.8	675.0	2,476.0	2,275.0
U.S. Retail [Member]
Segment Reporting Information [Line Items]
Net sales	2,664.6	2,609.4	8,143.5	8,058.0
U.S. Retail [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	577.3	512.5	1,875.6	1,759.1
International [Member]
Segment Reporting Information [Line Items]
Net sales	1,296.1	1,041.3	3,762.8	3,060.9
International [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	96.1	96.0	361.1	310.2
Bakeries and Foodservice [Member]
Segment Reporting Information [Line Items]
Net sales	469.9	469.4	1,457.1	1,472.6
Bakeries and Foodservice [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	75.4	66.5	239.3	205.7
Unallocated corporate items [Member] | Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating profit	100.6	6.3	206.8	249.7
Restructuring Settlement And Impairment Provisions [Member] | Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating profit	$ 6.1	$ 0.1	$ 18.0	$ 0.9