Business Segments and Related Information (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 28, 2011	Aug. 29, 2010	May 29, 2011
Business Segments and Related Information (Textuals) [Abstract]
Derivative gain to be reclassified to segment operating results in fiscal year 2012	$ 8.0
Derivative loss to be reclassified to segment operating results in fiscal year 2013	9.2
Derivative gain (loss) of previous year to be reclassified to segment operating results	$ 32.3
Percentage of consolidated net sales in consumer food segment accounted by Wal-Mart Stores, Inc. and its affiliates	18.00%	19.00%
Percentage of consolidated net receivables in commercial foods accounted by Wal-Mart Stores, Inc. and its affiliates	15.00%		15.00%
Number of reportable segment	2