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Business Combinations and Divestitures - Narrative (Details) SFr / shares in Units, shares in Millions, SFr in Millions, $ in Millions, ¥ in Billions |  |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 09, 2020 USD ($) shares | Jul. 09, 2020 CHF (SFr) SFr / shares shares | Apr. 01, 2019 USD ($) | Jan. 17, 2019 USD ($) | Jan. 17, 2019 JPY (¥) | Jun. 28, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 28, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 28, 2020 CHF (SFr) | Dec. 29, 2019 USD ($) | Jan. 16, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  |  |  |  |  | $ 949 | $ 5,346 |  |  |
Goodwill |  |  |  |  |  | $ 33,890 |  | 33,890 |  |  | $ 33,639 |
Contingent consideration |  |  |  |  |  | 796 |  | 796 |  |  | $ 1,715 |
Reversal of contingent consideration |  |  |  |  |  |  |  | 983 | 0 |  |  |
Other (income) expense, net |  |  |  |  |  | (24) | $ 1,683 | 655 | $ 1,705 |  |  |
bermekimab |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  |  |  | 800 |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 800 |  | 800 |  |  |  |
Verb Surgical Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 400 |  | 400 |  |  |  |
Goodwill |  |  |  |  |  | 200 |  | 200 |  |  |  |
Other assets |  |  |  |  |  | 200 |  | 200 |  |  |  |
Liabilities assumed |  |  |  |  |  | 300 |  | 300 |  |  |  |
Fair value of previously held equity investment |  |  |  |  |  | 400 |  | 400 |  |  |  |
Auris Health |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  | $ 3,400 |  |  |  |  |  |  |  |  |
Intangible assets |  |  | 3,000 |  |  |  |  |  |  |  |  |
Goodwill |  |  | 2,000 |  |  |  |  |  |  |  |  |
Liabilities assumed |  |  | 1,800 |  |  |  |  |  |  |  |  |
Contingent consideration |  |  | 2,350 |  |  | 200 |  | 200 |  |  |  |
Marketable securities |  |  | 200 |  |  |  |  |  |  |  |  |
Reversal of contingent consideration |  |  |  |  |  |  |  | 983 |  |  |  |
Ci:z Holdings Co. Ltd. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 1,500 |  | 1,500 |  |  |  |
Goodwill |  |  |  |  |  | 1,200 |  | 1,200 |  |  |  |
Liabilities assumed |  |  |  |  |  | 400 |  | 400 |  |  |  |
Business acquisition cost |  |  |  | $ 2,100 | ¥ 230 |  |  |  |  |  |  |
Foreign exchange rate |  |  |  |  |  |  |  |  |  |  |  | 109.06
Other (income) expense, net |  |  |  |  |  |  | $ 300 |  |  |  |  |
Adjustments made to intangible assets |  |  |  |  |  | 100 |  | $ 100 |  |  |  |
Weighted average useful life |  |  |  |  |  |  |  | 15 years 3 months 18 days |  |  |  |
AdvancedSterilizationProducts |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain from divestiture of business |  |  | 2,000 |  |  |  |  |  |  |  |  |
Discontinued Operations, Held-for-sale or Disposed of by Sale | Supply Chain |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale, current |  |  |  |  |  | 100 |  | $ 100 |  |  |  |
Discontinued Operations, Held-for-sale or Disposed of by Sale | AdvancedSterilizationProducts |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal group consideration |  |  | 2,800 |  |  |  |  |  |  |  |  |
Disposal group consideration, cash |  |  | 2,700 |  |  |  |  |  |  |  |  |
Receivables retained |  |  | $ 100 |  |  |  |  |  |  |  |  |
Idorsia | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares issued in transaction (in shares) | shares | 11.8 | 11.8 |  |  |  |  |  |  |  |  |  |
Percentage ownership before transaction | 8.30% | 8.30% |  |  |  |  |  |  |  |  |  |
Gross proceeds on sale | $ 357 | SFr 337 |  |  |  |  |  |  |  |  |  |
Sales price per share (in CHF per share) | SFr / shares |  | SFr 28.55 |  |  |  |  |  |  |  |  |  |
Ownership interest after sale | shares | 38.7 | 38.7 |  |  |  |  |  |  |  |  |  |
Percentage ownership after transaction | 20.00% | 20.00% |  |  |  |  |  |  |  |  |  |
Idorsia | Convertible Debt | Idorsia |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt | SFr |  |  |  |  |  |  |  |  |  | SFr 445 |  |
Idorsia | Idorsia | Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit | SFr |  |  |  |  |  |  |  |  |  | SFr 243 |  |
Other Income | Auris Health |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reversal of contingent consideration |  |  |  |  |  | $ 1,000 |  |  |  |  |  |

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