Employee Benefit Plans - Assumptions used (Details)	12 Months Ended
Nov. 29, 2020	Nov. 24, 2019	Nov. 25, 2018
Pension plans, defined benefit [Member]
Weighted-average assumptions used to determine net periodic benefit cost:
Discount rate	2.80%	4.10%	3.40%
Expected long-term rate of return on plan assets	3.80%	4.60%	5.40%
Rate of compensation increase	3.30%	3.40%	3.40%
Weighted-average assumptions used to determine benefit obligations:
Discount rate	2.10%	2.80%	4.10%
Rate of compensation increase	3.30%	3.30%	3.40%
Other postretirement benefit plans, defined benefit [Member]
Weighted-average assumptions used to determine net periodic benefit cost:
Discount rate	2.80%	4.20%	3.40%
Weighted-average assumptions used to determine benefit obligations:
Discount rate	2.00%	2.80%	4.20%
Assumed health care cost trend rates were as follows:
Health care trend rate assumed for next year	5.40%	5.70%	5.90%
Rate trend to which the cost trend is assumed to decline	4.40%	4.40%	4.40%
Year that rate reaches the ultimate trend rate	2037	2037	2037

No definition available.

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ References

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- Definition

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2919-114920

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- Definition

Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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- Definition

Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

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- Definition

Ultimate trend rate for health care cost for defined benefit postretirement plan.

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- Definition

Year ultimate health care cost trend rate is expected to be reached, in CCYY format.

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