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Acquisitions - Summarized Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Mar. 04, 2021 | Dec. 31, 2020 | Oct. 23, 2020
--- | --- | --- | --- | ---
MYR |  |  |  |
Intangible assets: |  |  |  |
Deferred income taxes, net |  | $ (513) |  |
Other assets (and liabilities), net |  | (187) |  |
Total identifiable net assets |  | 1,335 |  |
Goodwill |  | 226 |  |
Total consideration |  | 1,561 |  |
MYR | Acquired IPR&D |  |  |  |
Intangible assets: |  |  |  |
Acquired IPR&D |  | 1,190 |  |
MYR | Hepcludex |  |  |  |
Intangible assets: |  |  |  |
Finite-lived intangible asset |  | $ 845 |  |
Immunomedics, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and cash equivalents |  |  |  | $ 726
Inventories | $ 294 |  | $ 797 | 946
Intangible assets: |  |  |  |
Deferred income taxes, net |  |  |  | (4,565)
Liability related to future royalties |  |  |  | (1,100)
Other assets (and liabilities), net |  |  |  | 64
Total identifiable net assets |  |  |  | 16,606
Goodwill |  |  |  | 3,991
Total consideration |  |  |  | 20,597
Immunomedics, Inc. | Acquired IPR&D |  |  |  |
Intangible assets: |  |  |  |
Acquired IPR&D |  |  |  | 15,760
Immunomedics, Inc. | Trodelvy |  |  |  |
Intangible assets: |  |  |  |
Finite-lived intangible asset |  |  |  | 4,600
Immunomedics, Inc. | Outlicense contract |  |  |  |
Intangible assets: |  |  |  |
Finite-lived intangible asset |  |  |  | $ 175

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