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Acquistions, West Africa Investments, Goodwill and Other Intangible Assets Acquisitions, West Africa Investments, Goodwill and Other Intangible Assets - Impairment Testing (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 28, 2019 | Sep. 28, 2019 | Mar. 30, 2019 | Dec. 29, 2018
Goodwill [Line Items] |  |  |  |
Goodwill | $ 5,842 | $ 5,842 |  | $ 6,050
Divestiture Goodwill |  | 191 |  |
Divestiture net intangibles |  | 765 |  |
Indefinite-lived Intangible Assets Acquired |  | 18 |  |
Kashi |  |  |  |
Goodwill [Line Items] |  |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount |  |  |  | 18.00%
Europe transfer to AMEA |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  |  | $ 46 |
North America |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 4,420 | 4,420 |  | $ 4,611
Divestiture Goodwill |  | 191 |  |
Divestiture net intangibles |  | 765 |  |
Indefinite-lived Intangible Assets Acquired | $ 18 | $ 18 |  |

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