Shareholders' Equity (Details) (USD $)	0 Months Ended	3 Months Ended
	Sep. 26, 2011	Nov. 24, 2012	Nov. 26, 2011	Aug. 25, 2012	Mar. 02, 2011
Purchase of common shares, shares		400,000
Purchase of common shares, value			$ 25,000,000
Authorized amount of stock repurchase	250,000,000
Remaining repurchase amount as per authorization		120,800,000
Dividend declaration, number of rights distributed per share of outstanding common stock					1
Preferred stock, par value		$ 1		$ 1
Number of Options Exercised		600,000
Weighted Average Exercise Price of Options Exercised		$ 26.33
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value		$ 24,600,000