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Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 25, 2021 | Dec. 26, 2020 | Dec. 28, 2019
Income Tax Contingency [Line Items] |  |  |
Deferred Tax Assets, Goodwill and Intangible Assets | $ 1,111 | $ 1,146 |
Tax expense/(benefit) related to the TCJ Act | $ 190 | 0 | $ (8)
Net tax (benefit)/expense related to the TCJ Act per share | $ 0.14 |  | $ (0.01)
Total gross amount of reserves for income taxes | $ 1,900 |  |
Interest accrued | 326 | 338 |
Interest accrued recognized | (3) | $ (93) |
Operating loss carryforwards | 30,000 |  |
Income tax undistributed international earnings | $ 7,000 |  |
Effective Income Tax Rate Reconciliation, Percent | 21.80% | 20.90% | 21.00%
Transition tax liability | $ 2,900 |  |
Transition tax, expected payments | 309 |  |
Transition tax, payments made | 309 | $ 78 | $ 663
Expire in 2016 |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carryforwards | 300 |  |
Expire Between 2017 and 2035 Years |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carryforwards | 26,800 |  |
Carried Forward Indefinitely |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carryforwards | $ 2,900 |  |

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