Employee Benefit Plans - Defined benefit plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2021	Nov. 29, 2020	Nov. 24, 2019
Pension plans, defined benefit [Member]
Net periodic benefit (income) cost:
Service cost	$ 4,398	$ 4,026	$ 3,377
Interest cost	19,349	30,643	41,341
Expected return on plan assets	(36,635)	(41,189)	(42,098)
Amortization of prior service benefit	(65)	(62)	(61)
Amortization of actuarial loss	10,428	13,407	13,306
Curtailment loss (gain)	37	(650)	13
Net settlement loss (gain)	29	14,699	(56)
Net periodic benefit (income) cost	(2,459)	20,874	15,822
Changes in accumulated other comprehensive loss:
Actuarial (gain) loss	(21,132)	(34,821)	6,309
Amortization of prior service benefit (cost)	65	62	61
Amortization of actuarial loss	(10,428)	(13,407)	(13,306)
Curtailment gain	0	742	0
Net settlement (loss) gain	(29)	(14,699)	56
Total recognized in accumulated other comprehensive loss	(31,524)	(62,123)	(6,880)
Total recognized in net periodic benefit cost and accumulated other comprehensive loss	(33,983)	(41,249)	8,942
Other postretirement benefit plans, defined benefit [Member]
Net periodic benefit (income) cost:
Service cost	21	48	65
Interest cost	829	1,665	3,042
Expected return on plan assets	0	0	0
Amortization of prior service benefit	0	0	0
Amortization of actuarial loss	476	324	465
Curtailment loss (gain)	0	0	0
Net settlement loss (gain)	0	0	0
Net periodic benefit (income) cost	1,326	2,037	3,572
Changes in accumulated other comprehensive loss:
Actuarial (gain) loss	(3,059)	1,531	(2,903)
Amortization of prior service benefit (cost)	0	0	0
Amortization of actuarial loss	(476)	(324)	(465)
Curtailment gain	0	0	0
Net settlement (loss) gain	0	0	0
Total recognized in accumulated other comprehensive loss	(3,535)	1,207	(3,368)
Total recognized in net periodic benefit cost and accumulated other comprehensive loss	$ (2,209)	$ 3,244	$ 204