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Basis of Presentation - Narrative (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
country
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
country
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Summary of Significant Accounting Policies [Line Items]            
Net revenues $ 7,182 $ 6,665 $ 21,062 $ 19,283    
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      
Restricted cash $ 7   $ 7   $ 31  
Cash, cash equivalents and restricted cash 3,408 2,790 3,408 2,790 3,650 $ 1,328
Outstanding principal amount of receivables sold under factoring arrangement 819   819   $ 760  
Operating lease right-of-use assets obtained in exchange for lease obligations     159 187    
Finance lease right-of-use assets in exchange for lease obligations     59 129    
Argentina            
Summary of Significant Accounting Policies [Line Items]            
Net monetary liabilities 1   1      
Net revenues $ 111   $ 296      
Percentage of consolidated net revenues 1.50%   1.40%      
Argentina | Selling, general and administrative expenses            
Summary of Significant Accounting Policies [Line Items]            
Remeasurement loss due to inflationary accounting $ 2 $ 2 $ 10 $ 7    
U.K. | Geographic Concentration Risk | Net Revenues            
Summary of Significant Accounting Policies [Line Items]            
Concentration risk percentage     9.10%