Note 3 - Accounting for Share-Based Compensation - Fair Value of Options Granted (Details) - $ / shares	12 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013
Minimum [Member]
Expected volatility range	25.50%	31.61%	39.25%
Maximum [Member]
Expected volatility range	31.67%	37.06%	48.02%
Expected life (in years)	4 years 226 days	4 years 273 days	4 years 273 days
Weighted-average expected volatility	30.81%	33.83%	47.28%
Risk-free interest rate	1.27%	1.52%	0.77%
Expected dividend yield	1.12%	0.85%	0.87%
Weighted-average fair value of grants (in dollars per share)	$ 10.05	$ 13.82	$ 15.05