v3.24.1.u1
Restructuring Plans (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Allergan integration plan      
Restructuring charges      
Incurred total cumulative integration charges     $ 2,500
Charges associated with integration or restructuring plans   $ 58  
Allergan integration plan | Cost of products sold      
Restructuring charges      
Charges associated with integration or restructuring plans   14  
Allergan integration plan | Research and development      
Restructuring charges      
Charges associated with integration or restructuring plans   0  
Allergan integration plan | Selling, general and administrative      
Restructuring charges      
Charges associated with integration or restructuring plans   44  
Other restructuring      
Restructuring charges      
Charges associated with integration or restructuring plans $ 15 $ 27  
Restructuring reserve rollforward      
Accrued balance beginning of the period 196    
Restructuring charges 14    
Payments and other adjustments (32)    
Accrued balance end of the period $ 178