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Acquisitions and divestitures - Summary of Total Consideration for Teneobio Inc (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |
Contingent consideration |  | $ 0 | $ 309 | $ 0
Goodwill | $ 15,529 | 15,529 | $ 14,890 | $ 14,689
Teneobio |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash purchase price | 993 |  |  |
Contingent consideration | 299 |  |  |
Total consideration | 1,292 |  |  |
Cash and cash equivalents | 100 | 100 |  |
Goodwill | 273 | 273 |  |
Other assets, net | 16 | 16 |  |
Deferred tax liability | (244) | (244) |  |
Total assets acquired, net | 1,292 | 1,292 |  |
Teneobio | R & D Technology rights |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets | 115 | 115 |  |
Teneobio | Licensing rights |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets | 41 | 41 |  |
Teneobio | IPR&D |  |  |  |
Business Acquisition [Line Items] |  |  |  |
IPR&D | $ 991 | $ 991 |  |

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