Note 5 - Goodwill and Other Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 27, 2021	Nov. 28, 2020
Original cost	$ 1,123,510	$ 1,122,394
Accumulated amortization	(436,928)	(366,945)
Net identifiable intangibles	$ 686,582	$ 755,449
Weighted-average useful lives (in years) (Year)	17 years	17 years
Accumulated amortization	$ (436,928)	$ (366,945)
Purchased Technology And Patents [Member]
Original cost	115,980	113,775
Accumulated amortization	(62,364)	(53,216)
Net identifiable intangibles	$ 53,616	$ 60,559
Weighted-average useful lives (in years) (Year)	13 years	13 years
Accumulated amortization	$ (62,364)	$ (53,216)
Customer Relationships [Member]
Original cost	932,644	933,943
Accumulated amortization	(335,143)	(279,586)
Net identifiable intangibles	$ 597,501	$ 654,357
Weighted-average useful lives (in years) (Year)	17 years	17 years
Accumulated amortization	$ (335,143)	$ (279,586)
Trade Names [Member]
Original cost	63,543	63,266
Accumulated amortization	(33,786)	(29,368)
Net identifiable intangibles	$ 29,757	$ 33,898
Weighted-average useful lives (in years) (Year)	14 years	14 years
Accumulated amortization	$ (33,786)	$ (29,368)
Other Intangible Assets [Member]
Original cost	11,343	11,410
Accumulated amortization	(5,635)	(4,775)
Net identifiable intangibles	$ 5,708	$ 6,635
Weighted-average useful lives (in years) (Year)	12 years	12 years
Accumulated amortization	$ (5,635)	$ (4,775)