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Contingencies and Environmental Liabilities (Details) $ in Millions |  | 1 Months Ended | 2 Months Ended | 5 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 19, 2022 | Jul. 31, 2023 motion | Jun. 30, 2023 | May 31, 2023 patent | Oct. 31, 2024 patent | Dec. 31, 2024 USD ($) case Plaintiff | Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag |  |  |  |  |  | liabilities |
Accrued liabilities for environmental matters | $ |  |  |  |  |  | $ 41 | $ 42
Term for paying off environmental liabilities |  |  |  |  |  | 15 years |
Aggregate possible expenditure on environmental matters in excess of amounts accrued | $ |  |  |  |  |  | $ 46 |
Legal Defense Costs |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Legal defense costs reserve | $ |  |  |  |  |  | $ 225 | $ 210
Commercial and Other Litigation | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, pending claims |  |  |  |  |  | 2 |
Loss contingency, number of plaintiffs | Plaintiff |  |  |  |  |  | 2 |
The Johns Hopkins University |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of patents allegedly infringed | patent |  |  |  | 9 |  |  |
Number of patents allegedly infringed under review | patent |  |  |  |  | 9 |  |
Qui Tam | United States | Settled Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, motion for summary judgements granted | motion |  | 2 |  |  |  |  |
Gardasil/Gardasil 9 | United States | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, pending claims |  |  |  |  |  | 225 |
Gardasil/Gardasil 9 | Outside of the United States | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, pending claims |  |  |  |  |  | 15 |
RotaTeq | United States | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, number of plaintiffs |  |  |  |  |  | 35 |
Bridion | Patents |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, claims settled (in cases) |  |  |  |  |  | 5 |
Bridion | Patents | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, pending claims |  |  |  |  |  | 2 |
Loss contingency, trial period | 1 day |  |  |  |  |  |
Bridion | Patents | Settled Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Patent extension, term |  |  | 5 years |  |  |  |
Januvia/Janumet |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, claims settled (in cases) |  |  |  |  |  | 26 |
Dr. Scholl's | United States | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, pending claims |  |  |  |  |  | 415 |

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