Business Segments and Related Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Aug. 26, 2012	Aug. 28, 2011	May 27, 2012 Segment
Number of reportable segments			2
Increase in cost of goods sold	$ 33.2
Cumulative net derivative gains from economic hedges recognized in corporate	71.3
Net derivative gains recognized in general corporate expenses	130.2	(33.5)
Derivative gain and loss to be reclassified to segment operating results thereafter			58.9
Expect to reclassify gains in 2013			37.0
Expect to reclassify gains in 2014 and after			$ 34.3
Percentage of consolidated net sales in consumer food segment accounted by Wal-Mart Stores, Inc. and its affiliates	17.00%	18.00%
Percentage of consolidated net receivables in commercial foods accounted by Wal-Mart Stores, Inc. and its affiliates	14.00%		15.00%