Pension and Other Post-retirement Benefits - Plan Assets Allocations (Details) - Pension Benefits	Oct. 25, 2020	Oct. 27, 2019
Fixed Income
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	46.30%	44.90%
Global Stocks
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	39.20%	38.00%
Private Equity
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	5.40%	5.70%
Real Estate
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	5.20%	5.40%
Hedge Funds
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	2.40%	4.80%
Cash and Cash Equivalents
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	1.50%	1.20%
Minimum \| Fixed Income
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	35.00%	35.00%
Minimum \| Global Stocks
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	20.00%	20.00%
Minimum \| Private Equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	0.00%	0.00%
Minimum \| Real Estate
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	0.00%	0.00%
Minimum \| Hedge Funds
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	0.00%	0.00%
Maximum \| Fixed Income
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	60.00%	60.00%
Maximum \| Global Stocks
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	55.00%	55.00%
Maximum \| Private Equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	10.00%	10.00%
Maximum \| Real Estate
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	10.00%	10.00%
Maximum \| Hedge Funds
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	10.00%	10.00%

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Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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