Note 10 - Pension and Postretirement Benefits - Statement of Financial Position as of Fiscal Year End (Details) - USD ($) $ in Thousands	Nov. 27, 2021	Nov. 28, 2020
Non-current liabilities	$ (71,651)	$ (88,806)
Pension Plan [Member]
Prepaid postretirement costs	90,946	43,206
Pension Plan [Member] | UNITED STATES
Prepaid postretirement costs	66,157	30,672
Current liabilities	(1,342)	(1,467)
Non-current liabilities	(16,216)	(19,332)
Ending balance	48,599	9,873
Pension Plan [Member] | Foreign Plan [Member]
Prepaid postretirement costs	24,772	12,534
Current liabilities	(1,795)	(1,701)
Non-current liabilities	(44,753)	(59,521)
Ending balance	(21,776)	(48,688)
Other Postretirement Benefits Plan [Member]
Prepaid postretirement costs	107,323	73,137
Current liabilities	(227)	(226)
Non-current liabilities	(2,657)	(2,930)
Ending balance	$ 104,439	$ 69,981