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Intangible Assets and Goodwill - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jul. 01, 2018 | Jun. 30, 2019 | Jul. 01, 2018 | Apr. 01, 2019 | Dec. 30, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | $ 4,400 |  |  |  | $ 4,400 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 4,400 |  |  |  | 4,400 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 4,400 |  |  |  | 4,400 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 4,400 |  |  |  | 4,400 |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 4,400 |  |  |  | 4,400 |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 11,262 |  |  |  | 11,262 |  |  | $ 9,190
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Amortization expense of amortizable intangible assets | 1,100 |  |  | $ 1,100 | 2,200 | $ 2,200 |  |
Goodwill | 33,661 |  |  |  | 33,661 |  |  | 30,453
Patents And Trademarks |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Net | 25,082 |  |  |  | $ 25,082 |  |  | 25,410
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Weighted-Average Useful Life |  |  |  |  | 12 years |  |  |
Customer relationships and other intangible assets |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Net | 12,988 |  |  |  | $ 12,988 |  |  | 13,011
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Weighted-Average Useful Life |  |  |  |  | 21 years |  |  |
Consumer |  |  |  |  |  |  |  |
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Goodwill | 9,817 |  |  |  | $ 9,817 |  |  | 8,670
PHARMACEUTICAL |  |  |  |  |  |  |  |
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Goodwill | 9,104 |  |  |  | 9,104 |  |  | 9,063
Medical Devices |  |  |  |  |  |  |  |
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Goodwill | 14,740 |  |  |  | 14,740 |  |  | 12,720
Purchased In-Process Research And Development |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | 4,323 |  |  |  | 4,323 |  |  | $ 2,253
Alios Biopharma Inc | Purchased In-Process Research And Development |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment charge |  | $ 900 | $ 800 |  |  |  |  |
Auris Health |  |  |  |  |  |  |  |
Intangible Assets and Goodwill (Textuals) |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 2,000 |
Auris Health | Purchased In-Process Research And Development |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) | $ 2,900 |  |  |  | $ 2,900 |  |  |

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