Note 6 - Accounting for Share-based Compensation - Stock Option Activity (Details)	6 Months Ended
	Jun. 01, 2019 $ / shares shares
Outstanding Options (in shares) | shares	4,466,106
Outstanding Options, weighted-average exercise price (in dollars per share) | $ / shares	$ 44.72
Granted (in shares) | shares	960,774
Granted, weighted-average exercise price (in dollars per share) | $ / shares	$ 45.47
Exercised (in shares) | shares	(65,637)
Exercised, weighted-average exercise price (in dollars per share) | $ / shares	$ 27.98
Forfeited or cancelled (in shares) | shares	(13,632)
Forfeited or cancelled, weighted-average exercise price (in dollars per share) | $ / shares	$ 47.37
Outstanding Options (in shares) | shares	5,347,611
Outstanding Options, weighted-average exercise price (in dollars per share) | $ / shares	$ 45.05