Note 10 - Pension and Postretirement Benefits - Weighted-average Assumption Used to Determine Benefit Obligations and Net Costs (Details)		12 Months Ended
		Nov. 28, 2020	Nov. 30, 2019	Dec. 01, 2018
UNITED STATES
Discount rate		2.53%	3.19%	4.51%
Expected return on plan assets		7.50%	7.50%	7.75%
Foreign Plan [Member]
Expected return on plan assets		6.23%	6.21%	6.20%
Pension Plan [Member] | UNITED STATES
Discount rate		2.50%	3.17%	4.50%
Rate of compensation increase	[1]	4.50%	4.50%	4.50%
Discount rate		3.17%	4.50%	3.72%
Expected return on plan assets		7.49%	7.49%	7.75%
Rate of compensation increase	[1]	4.50%	4.50%	4.50%
Pension Plan [Member] | Foreign Plan [Member]
Discount rate		1.16%	1.35%	2.29%
Rate of compensation increase	[1]	1.74%	1.71%	1.75%
Discount rate		1.34%	2.30%	2.10%
Expected return on plan assets		6.23%	6.21%	6.20%
Rate of compensation increase	[1]	1.74%	1.71%	1.75%
Other Postretirement Benefits Plan [Member]
Discount rate		2.19%	3.00%	4.37%
Discount rate		3.00%	4.37%	3.54%
Expected return on plan assets		8.50%	8.50%	8.75%

[1] Benefits under the U.S. Pension Plan were locked-in as of May 31, 2011 and no longer include compensation increases. The 4.50 percent rate for 2020, 2019 and 2018 is for the supplemental executive retirement plan only.