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Pension and Other Post-retirement Benefits - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 25, 2020 | Oct. 27, 2019 | Oct. 28, 2018
Pension and Other Post-retirement Benefits |  |  |
Total costs, defined contribution benefit plans | $ 44.5 | $ 43.0 | $ 44.2
Pension Benefits |  |  |
Pension and Other Post-retirement Benefits |  |  |
Pension plans accumulated benefit obligation | 1,600.0 | $ 1,600.0 |
Expected contribution representing benefit payments for unfunded plans during next fiscal year | 29.4 |  |
Pension Benefits | Private Equity |  |  |
Pension and Other Post-retirement Benefits |  |  |
Commitments for investments | $ 125.0 |  |
Post-retirement Benefits |  |  |
Pension and Other Post-retirement Benefits |  |  |
Increase in per capita cost of covered health care benefits assumed for next fiscal year (as a percent) | 8.00% |  |
Expected ultimate pre-Medicare and post-Medicare rate (as a percent) | 5.00% |  |
Year that reaches the ultimate trend rate | 2026 |  |
Minimum | Pension Benefits |  |  |
Pension and Other Post-retirement Benefits |  |  |
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments | 8 years |  |
Minimum | Post-retirement Benefits |  |  |
Pension and Other Post-retirement Benefits |  |  |
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments | 4 years |  |
Maximum | Pension Benefits |  |  |
Pension and Other Post-retirement Benefits |  |  |
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments | 20 years |  |
Maximum | Post-retirement Benefits |  |  |
Pension and Other Post-retirement Benefits |  |  |
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments | 16 years |  |

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- Definition Represents the amortization period of actuarial gains and losses and any adjustments resulting from plan amendments, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The amount the company expects to contribute during next fiscal year that represent benefit payments for unfunded plans. + References No definition available. + Details
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- Definition Represents the entity's commitments for investments within the pension plans. + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + 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 (e) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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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. + 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 (l) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement 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 (l) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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