Note 10 - Pension and Postretirement Benefits - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands		Nov. 28, 2020		Nov. 30, 2019	Dec. 01, 2018
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		$ 398,403		$ 383,527	$ 346,460
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		202,242		185,331	169,455
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		109,056		94,474	82,910
Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		38,336		162,182
Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		83,643		78,813
Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		650		392
Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		359,468		220,740
Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		8,550		8,066
Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		205		219
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		770		675
Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		108,406		94,082
Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		398,009		383,141
Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		92,963		87,554
Fair Value, Inputs, Level 1, 2 and 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		109,056		94,474
Fair Value Measured at Net Asset Value Per Share [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	[1]	394		386
Fair Value Measured at Net Asset Value Per Share [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance	[1]	109,279		97,777
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		3,421		126,178
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		33,478		32,045
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		217,151		95,271
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		1,368		1,247
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		220,572		221,449
Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		34,846		33,292
Insurance [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Insurance [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Insurance [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		108,406		94,082	82,446
Insurance [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		108,406		94,082
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		1,524		119,103
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		49,813		46,262
Fixed Income Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		142,317		125,329
Fixed Income Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		7,182		6,819
Fixed Income Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		205		219	$ 266
Fixed Income Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		770		675
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		144,046		244,651
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		57,765		53,756
Cash [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		33,391	[2]	(83,099)
Cash [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		352		506
Cash [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		650		392
Cash [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0	[2]	140
Cash [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Cash [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Cash [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0	[2]	0
Cash [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Cash [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		0		0
Cash [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		33,392	[2]	(82,959)
Cash [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		352		506
Cash [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Amount, Ending Balance		$ 650		$ 392

[1] In accordance with ASC Topic 820-10, Fair Value Measurement, certain investments that are measured at NAV (Net Asset Value per share) (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts represented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position.

[2] Negative cash for 2019 represents unsettled pending trades within an investment that are classified in cash and cash equivalents until settled.