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Contingencies and Environmental Liabilities (Details) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2014 case | Dec. 31, 2021 USD ($) case claim Plaintiff | Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items] |  |  |
Accrued liabilities for environmental matters | $ |  | $ 40 | $ 43
Term for paying off environmental liabilities |  | 15 years |
Aggregate possible expenditure on environmental matters in excess of amounts accrued | $ |  | $ 40 |
Legal Defense Costs |  |  |
Loss Contingencies [Line Items] |  |  |
Legal defense costs reserve | $ |  | $ 230 | $ 235
Commercial Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims (in cases) |  | 2 |
Loss contingency, number of plaintiffs | Plaintiff |  | 2 |
Patent litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, claims settled (in cases) |  | 21 |
Fosamax |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims (in cases) |  | 3,470 |
Fosamax | Federal Court |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, claims dismissed (in cases) | 650 |  |
Loss contingency, claims on appeal (in cases) | 515 |  |
Januvia |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims (in cases) |  | 675 |
Januvia | Cases Company Agreed To Toll Statute Of Limitations |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims (in cases) | claim |  | 50 |
Januvia | Other State Court |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, pending claims (in cases) |  | 6 |

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