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Goodwill and other intangible assets - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, net | $ 24,664 |  | $ 26,639
Amortization charges associated with finite-lived intangible assets | 1,200 | $ 1,200 |
Total estimated amortization of finite-lived intangible assets for the remainder of the year | 3,100 |  |
Total estimated amortization of finite-lived intangible assets for 2026 | 3,700 |  |
Total estimated amortization of finite-lived intangible assets for 2027 | 3,700 |  |
Total estimated amortization of finite-lived intangible assets for 2028 | 2,800 |  |
Total estimated amortization of finite-lived intangible assets for 2029 | 2,200 |  |
Total estimated amortization of finite-lived intangible assets for 2030 | 2,100 |  |
Developed-product-technology rights |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, net | 24,081 |  | $ 26,017
Developed-product-technology rights | Otezla |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangible assets, fair value disclosure | 4,000 |  |
Finite-lived intangible assets, net | 4,800 |  |
Impairment charge | $ 800 |  |

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