Restructuring, Impairment, and Other Exit Costs (Schedule of restructuring, impairment, and other exit costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 26, 2013	May 27, 2012	May 29, 2011
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs	$ 19.8	$ 101.6	$ 4.4
Actions Previously Announced [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs	19.8	1.0	2.7
Productivity And Cost Savings Plan [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs	18.6	100.6
Fruit Flavored Snack Product Line [Member]
Restructuring And Related Cost [Line Items]
Restructuring, impairment, and other exit costs			$ 1.7