Benefits - Assumptions used (Details)	12 Months Ended
	Dec. 01, 2024	Nov. 26, 2023	Nov. 27, 2022
Pension plans, defined benefit [Member]
Weighted-average assumptions used to determine net periodic benefit cost:
Discount rate	5.50%	5.00%	2.40%
Expected long-term rate of return on plan assets	5.40%	4.80%	2.90%
Rate of compensation increase	3.50%	3.60%	3.50%
Weighted-average assumptions used to determine benefit obligations:
Discount rate	5.00%	5.50%	5.00%
Rate of compensation increase	3.50%	3.50%	3.60%
Other postretirement benefit plans, defined benefit [Member]
Weighted-average assumptions used to determine net periodic benefit cost:
Discount rate	5.60%	5.10%	2.40%
Weighted-average assumptions used to determine benefit obligations:
Discount rate	5.00%	5.60%	5.10%
Assumed health care cost trend rates were as follows:
Health care trend rate assumed for next year	7.30%	7.00%	6.10%
Rate trend to which the cost trend is assumed to decline	4.00%	3.90%	4.00%
Year that rate reaches the ultimate trend rate	2047	2048	2046