Restructuring, Impairment, and Other Exit Costs (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012	Nov. 27, 2011
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs	$ 2.7	$ 0.7	$ 11.9	$ 0.8
Productivity And Cost Savings Plan [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs			11.7
Payments for Restructuring			44.6
Productivity And Cost Savings Plan [Member] | U.S. Retail [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs			1.5
Productivity And Cost Savings Plan [Member] | International [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs			9.4
Productivity And Cost Savings Plan [Member] | Bakeries And Foodservice Segment [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs			$ 0.8