Note 10 - Pension and Postretirement Benefits - Changes in the Level 3 Plan Assets of Pension and Other Postretirement Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2024	Dec. 02, 2023
Pension Plan [Member] | UNITED STATES
Level 3 balance	$ 319,738	$ 326,786
Currency change effect	0	0
Level 3 balance	349,024	319,738
Pension Plan [Member] | Foreign Plan [Member]
Level 3 balance	134,622	141,908
Currency change effect	(1,957)	4,178
Level 3 balance	135,567	134,622
Other Postretirement Benefits Plan [Member]
Level 3 balance	133,453	120,782
Currency change effect	0	0
Level 3 balance	175,375	133,453
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Level 3 balance	0	45,251
Net transfers out of level 3	0	(45,072)
Purchases, sales, issuances and settlements, net	0	(179)
Level 3 balance	0	0
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Level 3 balance	726	703
Transfers into level 3	603	0
Net gains	17	0
Currency change effect	(21)	23
Level 3 balance	1,325	726
Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Level 3 balance	132,754	119,446
Purchases, sales, issuances and settlements, net	(1,431)	(1,144)
Net gains	40,486	14,452
Level 3 balance	$ 171,809	$ 132,754