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Contingencies - Januvia/Janumet Litigation - Narrative (Details) - Januvia
Sep. 30, 2018
legalmatter
Loss Contingencies [Line Items]  
Loss contingency, pending claims, number (in legal matters) 1,285
Cases Company Agreed To Toll Statute Of Limitations  
Loss Contingencies [Line Items]  
Loss contingency, pending claims, number (in legal matters) 50
Other state courts  
Loss Contingencies [Line Items]  
Loss contingency, pending claims, number (in legal matters) 8