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LEGAL PROCEEDINGS - Completed or Inactive Matters (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 14, 2017
claim
Jul. 21, 2016
USD ($)
Apr. 06, 2015
action
Feb. 28, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Jul. 31, 2013
manufacturer
Loss Contingencies [Line Items]                  
Favorable adjustment, litigation and other matters         $ 40 $ (3) $ 30 $ (112)  
Salix                  
Loss Contingencies [Line Items]                  
Number of suits filed | action     2            
Arbitration with Alfa Wasserman                  
Loss Contingencies [Line Items]                  
Development costs   $ 80              
Damages sought   $ 285              
Salix Ltd. SEC Investigation Litigation                  
Loss Contingencies [Line Items]                  
Favorable adjustment, litigation and other matters         $ 40        
Solodyn Antitrust Class Actions                  
Loss Contingencies [Line Items]                  
Number of settled claims | claim 2                
Number of manufacturers | manufacturer                 3
Damages awarded to plaintiff       $ 58