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Contingencies and Environmental Liabilities (Details) $ in Millions |  |  | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 30, 2023 patent | Dec. 19, 2022 | May 31, 2023 patent | Dec. 31, 2023 USD ($) case Plaintiff | Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag |  |  |  | liabilities |
Accrued liabilities for environmental matters | $ |  |  |  | $ 42.0 | $ 39.0
Term for paying off environmental liabilities |  |  |  | 15 years |
Aggregate possible expenditure on environmental matters in excess of amounts accrued | $ |  |  |  | $ 40.0 |
Legal Defense Costs |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Legal defense costs reserve | $ |  |  |  | 210.0 | $ 230.0
Zetia antitrust litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss related to settlement litigation | $ |  |  |  | $ 572.5 |
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, challenge of claims | patent | 1 |  |  |  |
Gardasil/Gardasil 9 | United States | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, pending claims |  |  |  | 140 |
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 |  |  |
Januvia/Janumet |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, claims settled (in cases) |  |  |  | 26 |

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