Note 7 - Accounting for Share-based Compensation - Stock Option Activity (Details)	6 Months Ended
	May 30, 2020 $ / shares shares
Outstanding Options (in shares) | shares	5,060,310
Outstanding Options, weighted-average exercise price (in dollars per share) | $ / shares	$ 46.04
Granted (in shares) | shares	1,047,470
Granted, weighted-average exercise price (in dollars per share) | $ / shares	$ 47.72
Exercised (in shares) | shares	(49,829)
Exercised, weighted-average exercise price (in dollars per share) | $ / shares	$ 31.25
Forfeited or cancelled (in shares) | shares	(120,070)
Forfeited or cancelled, weighted-average exercise price (in dollars per share) | $ / shares	$ 48.76
Outstanding Options (in shares) | shares	5,937,881
Outstanding Options, weighted-average exercise price (in dollars per share) | $ / shares	$ 46.41