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Pensions And Other Postretirement Benefits (Estimated Future Benefit Payments Expected To Be Paid) (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 29, 2018 plan | Apr. 01, 2017 plan | Sep. 28, 2019 USD ($)
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
2019 |  |  | $ 4
2020 |  |  | 4
2021 |  |  | 4
2022 |  |  | 4
2023 |  |  | 4
2024-2028 |  |  | 14
Funded Plan [Member] | Qualified Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Number of Plans Subject to Settlement | plan | 3 | 2 |
2019 |  |  | 1
2020 |  |  | 0
2021 |  |  | 1
2022 |  |  | 0
2023 |  |  | 2
2024-2028 |  |  | 4
Unfunded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
2019 |  |  | 12
2020 |  |  | 12
2021 |  |  | 13
2022 |  |  | 13
2023 |  |  | 13
2024-2028 |  |  | $ 66

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