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Goodwill and Other Intangibles - Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Other intangibles, net | $ 20,269 |  | $ 18,011 | $ 20,269 |
Intangible asset impairment charges |  |  | $ 792 | 1,749 | $ 302
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Research and development |  |
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Research and development |  |
Amortization expense for intangible assets |  |  | $ 2,000 | 2,100 | 1,600
Estimated aggregate amortization expense, 2024 |  |  | 1,800 |  |
Estimated aggregate amortization expense, 2025 |  |  | 1,700 |  |
Estimated aggregate amortization expense, 2026 |  |  | 1,600 |  |
Estimated aggregate amortization expense, 2027 |  |  | 1,400 |  |
Estimated aggregate amortization expense, 2028 |  |  | 1,100 |  |
IPR&D |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
IPR&D intangible asset | 7,661 |  | 6,816 | 7,661 |
Animal Health |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Other intangibles, net |  |  | 4,200 |  |
sotatercept | IPR&D |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
IPR&D intangible asset |  |  | 6,400 |  |
gefapixant | IPR&D |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
IPR&D impairment charges |  |  | 779 |  |
Lyfnua |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 53 |  |
nemtabrutinib | IPR&D |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
IPR&D intangible asset |  |  | 418 |  |
IPR&D impairment charges | 780 | $ 807 |  | 1,600 | $ 275
nemtabrutinib | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Discount rate |  |  |  |  | 0.085
Product rights |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net | 6,810 |  | 5,878 | 6,810 |
Product rights | Reblozyl |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 3,200 |  |
Product rights | Zerbaxa |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 333 |  |
Product rights | Sivextro |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 106 |  |
Product rights | Animal Health |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 2,000 |  |
Trade names |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net | 2,244 |  | 2,105 | 2,244 |
Trade names | Animal Health |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 2,100 |  |
Licenses and other |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net | $ 3,554 |  | 3,212 | 3,554 |
Licenses and other | Lynparza | Licenses and other |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 1,500 |  |
Licenses and other | Lenvima | Licenses and other |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | 683 |  |
Licenses and other | Adempas | Licenses and other |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible assets, net |  |  | $ 526 |  |
Licenses and other | derazantinib |  |  |  |  |
Intangible Assets Excluding Goodwill [Line Items] |  |  |  |  |
Intangible asset impairment charge related to finite-lived intangible asset |  |  |  | $ 80 |

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