Business Segments and Related Information (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 26, 2012	Feb. 27, 2011	Feb. 26, 2012	Feb. 27, 2011	May 29, 2011
Business Segments and Related Information (Textual) [Abstract]
Derivative gain to be reclassified to segment operating results in fiscal year 2012			$ 5.7
Derivative loss to be reclassified to segment operating results in fiscal year 2013			0.7
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	17.00%	18.00%	18.00%	18.00%
Percentage of consolidated net receivables in commercial foods accounted by Wal-Mart Stores, Inc. and its affiliates	16.00%		16.00%		15.00%