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Income Taxes Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 4 Months Ended | 8 Months Ended
--- | --- | --- | ---
Sep. 08, 2018 | Dec. 30, 2017 | Sep. 08, 2018 | Sep. 09, 2017
Income Tax Disclosure [Abstract] |  |  |  |
Federal Audit Settlement | $ 364 |  | $ 678 |
Federal Audit Settlement, Net of tax, Per share amount | $ 0.26 |  | $ 0.48 |
Federal Statutory Tax Rate, Pre TCJ Act |  | 35.00% |  |
Federal Statutory Tax Rate, Post TCJ Act | 21.00% |  | 21.00% |
Provisional net tax expense related to the TCJ Act |  |  | $ 854 | $ 0
Transition tax |  | $ 2,500 | 2,500 |
Additional Transition Tax | $ 76 |  | $ 854 |
Additional Transition Tax, Net of tax, Per share amount | $ 0.05 |  | $ 0.60 |

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