Consolidated Statements of Common Stockholders' Equity (Parenthetical) (USD $)	3 Months Ended																12 Months Ended
	May 26, 2013		Feb. 24, 2013		Nov. 25, 2012		Aug. 26, 2012		May 27, 2012		Feb. 26, 2012		Nov. 27, 2011		Aug. 28, 2011		May 26, 2013	May 27, 2012	May 29, 2011
Statement of Stockholders' Equity [Abstract]
Dividends declared per share	$ 0.25	[1]	$ 0.25	[1]	$ 0.25	[1]	$ 0.24	[1]	$ 0.24	[1]	$ 0.24	[1]	$ 0.24	[1]	$ 0.23	[1]	$ 0.99	$ 0.95	$ 0.89

[1] Basic and diluted earnings per share are calculated independently for each of the quarters presented. Accordingly, the sum of the quarterly earnings per share amounts may not agree with the total year.