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Pensions And Other Postretirement Benefits (Reconciliation Of Changes In Plans' Benefit Obligations, Assets And Funded Status) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 14 | $ 14 | $ 13
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | 31 | 34 | 50
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 | 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total | (31) | (34) |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | 0 | 0 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 3 | 3 |
Defined Benefit Plan, Service Cost | 2 | 2 | 2
Defined Benefit Plan, Interest Cost | 1 | 1 | 1
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | 0 | (16) |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (3) | 0 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | (3) | (3) |
Defined Benefit Plan, Plan Assets, Benefits Paid | (3) | (3) |
Defined Benefit Plan, Funded Plan | Qualified Plan | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | 20 | 21 | 18
Defined Benefit Plan, Plan Assets, Amount | 30 | 30 | 27
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total | 10 | 9 |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | 1 | 4 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 0 | 0 |
Defined Benefit Plan, Service Cost | 0 | 0 | 0
Defined Benefit Plan, Interest Cost | 1 | 1 | 1
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | 0 | 0 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (1) | 3 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | (1) | (1) |
Defined Benefit Plan, Plan Assets, Benefits Paid | (1) | (1) |
Defined Benefit Plan, Unfunded Plan | Nonqualified Plan | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation | 156 | 167 | 158
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 | 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total | (156) | (167) |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) | 0 | 0 |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 14 | 14 |
Defined Benefit Plan, Service Cost | 0 | 0 | 0
Defined Benefit Plan, Interest Cost | 7 | 9 | $ 8
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment | 0 | 0 |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | (4) | 14 |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | (14) | (14) |
Defined Benefit Plan, Plan Assets, Benefits Paid | $ (14) | $ (14) |

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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 (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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