Note 10 - Pension and Postretirement Benefits - Asset Allocation (Details)		Nov. 27, 2021	Nov. 28, 2020
Equity Funds [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation		60.00%
Fixed Income Funds [Member]
Defined Benefit Plan, Target Plan Asset Allocation		40.00%
Fixed Income Funds [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation		40.00%
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation		100.00%
Percentage of Plan Assets at Year End		100.00%	100.00%
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Target Plan Asset Allocation		100.00%
Percentage of Plan Assets at Year End		100.00%	100.00%
Pension Plan [Member] | Equity Funds [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation		60.00%
Percentage of Plan Assets at Year End		57.70%	55.40%
Pension Plan [Member] | Equity Funds [Member] | Foreign Plan [Member]
Defined Benefit Plan, Target Plan Asset Allocation		21.20%
Percentage of Plan Assets at Year End		21.30%	48.80%
Pension Plan [Member] | Fixed Income Funds [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation		40.00%
Percentage of Plan Assets at Year End		40.10%	36.20%
Pension Plan [Member] | Fixed Income Funds [Member] | Foreign Plan [Member]
Defined Benefit Plan, Target Plan Asset Allocation		77.30%
Percentage of Plan Assets at Year End		67.00%	51.00%
Pension Plan [Member] | Insurance [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation		0.00%
Percentage of Plan Assets at Year End		0.00%	0.00%
Pension Plan [Member] | Insurance [Member] | Foreign Plan [Member]
Defined Benefit Plan, Target Plan Asset Allocation		0.00%
Percentage of Plan Assets at Year End		0.00%	0.00%
Pension Plan [Member] | Cash [Member] | UNITED STATES
Defined Benefit Plan, Target Plan Asset Allocation	[1]	0.00%
Percentage of Plan Assets at Year End	[1]	2.20%	8.40%
Pension Plan [Member] | Cash [Member] | Foreign Plan [Member]
Defined Benefit Plan, Target Plan Asset Allocation	[1]	1.50%
Percentage of Plan Assets at Year End	[1]	11.70%	0.20%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Target Plan Asset Allocation		100.00%
Percentage of Plan Assets at Year End		100.00%	100.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan, Target Plan Asset Allocation		0.00%
Percentage of Plan Assets at Year End		0.00%	0.00%
Other Postretirement Benefits Plan [Member] | Fixed Income Funds [Member]
Defined Benefit Plan, Target Plan Asset Allocation		0.00%
Percentage of Plan Assets at Year End		0.00%	0.00%
Other Postretirement Benefits Plan [Member] | Insurance [Member]
Defined Benefit Plan, Target Plan Asset Allocation		100.00%
Percentage of Plan Assets at Year End		99.80%	99.40%
Other Postretirement Benefits Plan [Member] | Cash [Member]
Defined Benefit Plan, Target Plan Asset Allocation	[1]	0.00%
Percentage of Plan Assets at Year End	[1]	0.20%	0.60%

[1] Negative cash for 2020 represents unsettled pending trades within an investment that are classified in cash and cash equivalents until settled.