Note 11 - Pension and Postretirement Benefits - Weighted-average Assumption Used to Determine Benefit Obligations and Net Costs (Details)		12 Months Ended
		Nov. 30, 2019	Dec. 01, 2018	Dec. 02, 2017
UNITED STATES
Discount rate		3.19%	4.51%	3.73%
Expected return on plan assets		7.50%	7.75%	7.75%
Foreign Plan [Member]
Expected return on plan assets		6.21%	6.20%	6.21%
Pension Plan [Member] | UNITED STATES
Discount rate		3.17%	4.50%	3.72%
Rate of compensation increase	[1]	4.50%	4.50%	4.50%
Discount rate		4.50%	3.72%	4.08%
Expected return on plan assets		7.49%	7.75%	7.75%
Rate of compensation increase	[1]	4.50%	4.50%	4.50%
Pension Plan [Member] | Foreign Plan [Member]
Discount rate		1.35%	2.29%	2.12%
Rate of compensation increase	[1]	1.71%	1.75%	1.71%
Discount rate		2.30%	2.10%	2.15%
Expected return on plan assets		6.21%	6.20%	6.21%
Rate of compensation increase	[1]	1.71%	1.75%	1.47%
Other Postretirement Benefits Plan [Member]
Discount rate		3.00%	4.37%	3.54%
Discount rate		4.37%	3.54%	3.85%
Expected return on plan assets		8.50%	8.75%	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 2019, 2018 and 2017 are for the supplemental executive retirement plan only.