Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 30, 2021	May 24, 2020	May 30, 2021	May 24, 2020
Net periodic benefit (income) cost:
Net periodic benefit (income) cost	$ (290)	$ 2,162	$ (574)	$ 4,375
Pension benefits
Net periodic benefit (income) cost:
Net periodic benefit (income) cost	(621)	1,652	(1,237)	3,356
Postretirement benefits
Net periodic benefit (income) cost:
Net periodic benefit (income) cost	$ 331	$ 510	$ 663	$ 1,019