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Contingencies - Narrative (Details) $ in Millions | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2014 case | Sep. 30, 2021 USD ($) case claim | Dec. 31, 2020 USD ($)
Legal Defense Costs |  |  |
Loss Contingencies [Line Items] |  |  |
Legal defense costs reserve | $ |  | $ 225 | $ 235
Zetia antitrust litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims | claim |  | 35 |
Fosamax |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims |  | 3,470 |
Fosamax | Femur Fracture Litigation | Federal |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, claims on appeal | 515 |  |
Loss contingency, claims dismissed | 650 |  |
Januvia |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims | claim |  | 730 |
Januvia | Other State Court |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims | claim |  | 6 |
Januvia | Cases Company Agreed To Toll Statute Of Limitations |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims | claim |  | 50 |
Bridion | Patents |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, claims settled |  | 3 |
Januvia and Janumet | Patents |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, claims settled |  | 16 |

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