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Pension and Other Postretirement Benefit Plans (Narrative) (Details) $ in Millions | 12 Months Ended
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Sep. 28, 2024 USD ($) plan | Sep. 30, 2023 USD ($) | Oct. 01, 2022 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Contribution Plan, Cost | $ 111 | $ 113 | $ 114
Defined Benefit Plan, Funding Status [Extensible Enumeration] | Defined Benefit Plan, Unfunded Plan |  |
Pension Plan [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 4 |  |
Multiemployer Plan, Employer Contribution, Cost | $ 2 | 2 |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | 14 |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 14 | 13 | 13
Defined Benefit Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Number of Plans | plan | 3 |  |
Pension Plan [Member] | Nonqualified Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 3 |  |
Pension Plan [Member] | Defined Benefit Plan, Funded Plan | Qualified Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Frozen and Noncontributory Plans | plan | 1 |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 0 | 0 |
Defined Benefit Plan, Benefit Obligation | 21 | 18 | 17
Defined Benefit Plan, Expected Amortization, Next Fiscal Year | 0 |  |
Defined Benefit Plan, Accumulated Benefit Obligation | 21 | 18 |
Assets for Plan Benefits, Defined Benefit Plan | 9 | 9 |
Defined Benefit Plan, Plan Assets, Amount | 30 | 27 | 24
Pension Plan [Member] | Defined Benefit Plan, Unfunded Plan | Nonqualified Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 14 | 13 |
Defined Benefit Plan, Benefit Obligation | 167 | 158 | 166
Assets for Plan Benefits, Defined Benefit Plan | 0 | 0 |
Defined Benefit Plan, Plan Assets, Amount | $ 0 | 0 | 0
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 8 |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 3 | 3 |
Defined Benefit Plan, Benefit Obligation | 34 | 50 | 55
Defined Benefit Plan, Gain from Plan Amendment | 16 |  |
Assets for Plan Benefits, Defined Benefit Plan | 0 | 0 |
Defined Benefit Plan, Plan Assets, Amount | $ 0 | $ 0 | $ 0
Other Postretirement Benefits Plan [Member] | Other Postretirement Benefit Plans, Fixed Annual Payments or Life Insurance |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 2 |  |
Defined Benefit Plan, Benefit Obligation | $ 8 |  |
Postretirement Health Coverage |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 5 |  |
Postretirement Health Coverage | Other Postretirement Benefit Plans, Fixed Annual Payments or Life Insurance |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 1 |  |
Postretirement Health Coverage | Other Postretirement Benefit Plan, Hillshire and Keystone Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 2 |  |
Postretirement Health Coverage | Other Postretirement Benefit Plan, Heathcare Cost Trend Rates, Hillshire Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | $ 1 |  |
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year | 7.10% |  |
Postretirement Health Coverage | Other Postretirement Benefit Plan, Heathcare Cost Trend Rates, Keystone Plan |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | $ 3 |  |
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year | 6.80% |  |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate | 4.50% |  |
Postretirement Health Coverage | Other Postretirement Benefit Plan, Plan Amendments |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 1 |  |
Postretirement Health Coverage | Other Postretirement Benefit Plan, Plan Amendments | Maximum |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | $ 1 |  |
Postretirement Life Insurance | Other Postretirement Benefit Plans, Fixed Annual Payments or Life Insurance |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Defined Benefit Plan, Number of Plans | plan | 1 |  |

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- Definition Defined Benefit Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Number of 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 -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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