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Basis of Presentation (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
country
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
country
Sep. 30, 2018
USD ($)
Jan. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Summary of Significant Accounting Policies [Line Items]            
Net revenues $ 6,355 $ 6,288 $ 18,955 $ 19,165    
Number of countries in which products are sold (more than) | country 150   150      
Number of countries in which entity operates (more than) | country 80   80      
Outstanding principal amount of receivables sold under factoring arrangement $ 745   $ 745     $ 819
ASU 2016-02            
Summary of Significant Accounting Policies [Line Items]            
Lease related assets         $ 710  
Lease related liabilities         $ 730  
Argentina            
Summary of Significant Accounting Policies [Line Items]            
Net monetary assets 2   2      
Net revenues $ 98   $ 297      
Percentage of consolidated net revenues 1.50%   1.60%      
Argentina | Selling, general and administrative expenses            
Summary of Significant Accounting Policies [Line Items]            
Remeasurement loss due to inflationary accounting $ 1 $ 13 $ 2 $ 13    
U.K. | Geographic Concentration Risk | Net Revenues            
Summary of Significant Accounting Policies [Line Items]            
Concentration risk percentage     8.40%