Note 9 - Accounting for Share-based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
Nov. 28, 2020	Nov. 30, 2019	Dec. 01, 2018
Outstanding Options (in shares)	5,060,310	4,466,106	3,860,764
Outstanding Options, weighted-average exercise price (in dollars per share)	$ 46.04	$ 44.72	$ 42.28
Granted (in shares)	1,052,968	1,020,246	818,537
Granted, weighted-average exercise price (in dollars per share)	$ 47.70	$ 45.53	$ 53.06
Exercised (in shares)	(397,456)	(378,734)	(198,849)
Exercised, weighted-average exercise price (in dollars per share)	$ 31.00	$ 28.74	$ 31.37
Forfeited or cancelled (in shares)	(169,907)	(47,308)	(14,346)
Forfeited or cancelled, weighted-average exercise price (in dollars per share)	$ 49.11	$ 48.90	$ 48.62
Outstanding Options (in shares)	5,545,915	5,060,310	4,466,106
Outstanding Options, weighted-average exercise price (in dollars per share)	$ 47.34	$ 46.04	$ 44.72

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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