Contingencies (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Feb. 22, 2009	Nov. 27, 2011 Hogs
Additional Contingencies (Textual) [Abstract]
Maximum period of guarantee under leases and other commercial obligations guarantee agreement		four years
Minimum quantity of hogs to be purchased under hog purchase agreement through 2014		1,200,000
Guaranteed period to third parties for income tax credits over their statutory lives		7 years
Face value of federal income tax credits		$ 21.2
Dispute coverage charge with insurance carrier	$ 24.8
Term of loan under certain agreement years		14 years