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Acquisitions, Research Collaborations and License Agreements - Acquisitions (Details) $ in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 01, 2019 USD ($) | Jul. 31, 2019 USD ($) | Apr. 30, 2019 USD ($) | Jun. 30, 2018 AUD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Acquisitions Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 19,490 |  | $ 19,490 |  | $ 18,253
Research and development |  |  |  |  |  | $ 2,189 | $ 2,274 | $ 4,119 | $ 5,470 |
Antelliq |  |  |  |  |  |  |  |  |  |
Acquisitions Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business | $ 2,300 |  |  |  |  |  |  |  |  |
Payment of debt | 1,300 |  |  |  |  |  |  |  |  |
Transaction costs | 47 |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 31 |  |  |  |  |  |  |  |  |
Goodwill | $ 1,343 |  |  |  |  |  |  |  |  |
Immune Design |  |  |  |  |  |  |  |  |  |
Acquisitions Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  | $ 301 |  |  |  |  |  |  |
Intangible assets recognized |  |  | 156 |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 83 |  |  |  |  |  |  |
Other assets recognized |  |  | 31 |  |  |  |  |  |  |
Goodwill |  |  | $ 31 |  |  |  |  |  |  |
Viralytics |  |  |  |  |  |  |  |  |  |
Acquisitions Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  |  | $ 502 | $ 378 |  |  |  |  |
Other assets recognized |  |  |  |  | $ 34 |  | 34 |  | 34 |
Research and development |  |  |  |  |  |  | $ 344 |  | $ 344 |
Subsequent Event | Peloton |  |  |  |  |  |  |  |  |  |
Acquisitions Research Collaborations And License Agreements Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  | $ 1,050 |  |  |  |  |  |  |  |
Potential future milestone payments, maximum |  | $ 1,150 |  |  |  |  |  |  |  |

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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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