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. 27, 2021	Nov. 28, 2020
Pension Plan [Member] | UNITED STATES
Level 3 balance	$ 398,403	$ 383,527
Currency change effect	0	0
Level 3 balance	409,811	398,403
Pension Plan [Member] | Foreign Plan [Member]
Level 3 balance	202,242	185,331
Currency change effect	(5,230)	10,207
Level 3 balance	216,623	202,242
Other Postretirement Benefits Plan [Member]
Level 3 balance	109,056	94,474
Currency change effect	0	0
Level 3 balance	135,701	109,056
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Level 3 balance	205
Level 3 balance	186	205
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Level 3 balance	770
Level 3 balance	749	770
Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Level 3 balance	108,406
Level 3 balance	135,484	108,406
Fixed Income Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Level 3 balance	205	219
Purchases, sales, issuances and settlements, net	(19)	(14)
Level 3 balance	186	205
Fixed Income Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Level 3 balance	770
Level 3 balance	749	770
Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Level 3 balance	770	675
Net transfers into / (out of) level 3	64	43
Net gains	(43)	(8)
Currency change effect	(42)	60
Level 3 balance	749	770
Insurance [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Level 3 balance	108,406	94,082
Purchases, sales, issuances and settlements, net	(1,093)	(822)
Net transfers into / (out of) level 3	(1,658)	(831)
Net gains	29,829	15,977
Level 3 balance	$ 135,484	$ 108,406