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Contingencies and Environmental Liabilities - Januvia/Janumet Litigation - Narrative (Details) - Januvia
Dec. 31, 2018
legalmatter
Loss Contingencies [Line Items]  
Loss contingency, pending claims number 1,290
Cases Company Agreed To Toll Statute Of Limitations  
Loss Contingencies [Line Items]  
Loss contingency, pending claims number 50
Other State Court  
Loss Contingencies [Line Items]  
Loss contingency, pending claims number 8