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Acquisitions, Divestitures, Research Collaborations and License Agreements - Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 01, 2019 USD ($) | Dec. 31, 2020 USD ($) | Jan. 16, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Goodwill |  | $ 20,238 |  | $ 19,425 | $ 18,253
Antelliq |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Cash and cash equivalents | $ 31 |  |  |  |
Accounts receivable | 73 |  |  |  |
Inventories | 93 |  |  |  |
Property, plant and equipment | 60 |  |  |  |
Identifiable intangible assets (useful lives ranging from 18-24 years) | 2,689 |  |  |  |
Deferred income tax liabilities | (589) |  |  |  |
Other assets and liabilities, net | (82) |  |  |  |
Total identifiable net assets | 2,275 |  |  |  |
Goodwill | 1,376 |  |  |  |
Consideration transferred | $ 3,651 |  |  |  |
Antelliq | Measurement Input, Discount Rate |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Present value discount rate | 0.115 |  |  |  |
ArQule |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Cash and cash equivalents |  |  | $ 145 |  |
In-process research and development (IPR&D) |  |  | 2,280 |  |
Identifiable intangible assets (useful lives ranging from 18-24 years) |  |  | 80 |  |
Deferred income tax liabilities |  |  | (361) |  |
Other assets and liabilities, net |  |  | 34 |  |
Total identifiable net assets |  |  | 2,178 |  |
Goodwill |  |  | 512 |  |
Consideration transferred |  |  | $ 2,690 |  |
ArQule | Measurement Input, Discount Rate |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Present value discount rate |  |  | 0.125 |  |
Minimum |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Estimated useful life of intangible assets |  | 2 years |  |  |
Minimum | Antelliq |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Estimated useful life of intangible assets | 18 years |  |  |  |
Maximum |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Estimated useful life of intangible assets |  | 24 years |  |  |
Maximum | Antelliq |  |  |  |  |
Acquisitions Divestitures Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |
Estimated useful life of intangible assets | 24 years |  |  |  |

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