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SIGNIFICANT ACCOUNTING POLICIES - Concentrations of Credit Risk (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
wholesaler
Dec. 31, 2018
USD ($)
Dec. 31, 2017
Concentrations of Credit Risk      
Maximum term of original maturity to classify instruments as cash and cash equivalents (less than) 3 months    
Percentage of net trade receivables accounted for by largest wholesale customers 41.00%    
Allowance for doubtful accounts $ 48 $ 47  
Argentina, Brazil, Egypt, Greece, Turkey, Ukraine and Venezuela      
Concentrations of Credit Risk      
Net trade receivable $ 128 $ 105  
Past due period for receivables to be negligible (less than) 90 days    
Period net trade receivable balance outstanding (more than) 90 days    
Portion of net trade receivables that is past due $ 1    
Trade receivables | Three largest U.S. wholesaler customers | Credit concentration      
Concentrations of Credit Risk      
Number of largest wholesale customers | wholesaler 3    
Amoun | Revenue      
Concentrations of Credit Risk      
Concentration risk, percentage 3.00% 2.00% 2.00%