Note 12 - Financial Instruments - Gains (Losses) on Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Dec. 01, 2018
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Other Operating Income (Expense) [Member]
Pretax gain (loss) recognized in income	$ (2,908)	$ (573)	$ 2,776
Cash Flow Hedging [Member] | Currency Swap [Member] | Designated as Hedging Instrument [Member]
Pretax gain (loss) recognized in other comprehensive income	6,307	14,429	(4,047)
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Pretax gain (loss) recognized in other comprehensive income	$ (15,618)	$ (46,254)	$ 25,819