Consolidated Statements of Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Nov. 30, 2019	Nov. 24, 2018	Nov. 25, 2017
Retained Earnings [Member]
Regular dividends, per share (in dollars per share)	$ 0.50	$ 0.47	$ 0.42
Special dividends, per share (in dollars per share)			0.35
Regular dividends, per share (in dollars per share)	0.50	0.47	0.42
Special dividends, per share (in dollars per share)	$ 0	$ 0	$ 0.35