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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. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Employer contributions | $ 13 | $ 29 | $ 53
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 28 | 33 |
Service cost | 2 | 1 | 1
Interest cost | 1 | 1 | 1
Curtailment | 0 | 0 |
Plan Amendments | 4 | 0 |
Actuarial (gain) loss | 6 | (5) |
Benefits paid | (4) | (2) |
Defined Benefit Plan, Benefit Obligation, Business Combination | 13 |  |
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change | 27 |  |
Benefit obligation at end of year | 77 | 28 | 33
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 4 | 2 |
Benefits paid | (4) | (2) |
Fair value of plan assets at end of year | 0 | 0 | 0
Funded status | (77) | (28) |
Funded Plan [Member] | Qualified Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 1,392 | 1,477 |
Service cost | 0 | 0 | 2
Interest cost | 56 | 55 | 57
Curtailment | 0 | 0 |
Plan Amendments | 0 | 0 |
Actuarial (gain) loss | 154 | (60) |
Benefits paid | (77) | (80) |
Defined Benefit Plan, Benefit Obligation, Business Combination | 2 |  |
Defined Benefit Plan, Benefit Obligation, Payment for Settlement | (49) |  |
Benefit obligation at end of year | 1,478 | 1,392 | 1,477
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 1,450 | 1,512 |
Actual return on plan assets | 146 | 4 |
Employer contributions | 1 | 14 |
Benefits paid | (77) | (80) |
Defined Benefit Plan, Plan Assets, Business Combination | 2 |  |
Defined Benefit Plan, Plan Assets, (Increase) Decrease for Settlement | (45) |  |
Fair value of plan assets at end of year | 1,477 | 1,450 | 1,512
Funded status | (1) | 58 |
Unfunded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 220 | 230 |
Service cost | 1 | 7 | 11
Interest cost | 9 | 8 | 8
Curtailment | 0 | (5) |
Plan Amendments | 0 | 5 |
Actuarial (gain) loss | 17 | (10) |
Benefits paid | (12) | (15) |
Defined Benefit Plan, Benefit Obligation, Business Combination | 4 |  |
Benefit obligation at end of year | 239 | 220 | 230
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 12 | 15 |
Benefits paid | (12) | (15) |
Fair value of plan assets at end of year | 0 | 0 | $ 0
Funded status | $ (239) | $ (220) |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: 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 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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