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Summary of Significant Accounting Policies - Narrative (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
country
Sep. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
country
segment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jul. 01, 2020
Jan. 01, 2019
USD ($)
Dec. 31, 2017
USD ($)
Summary Of Significant Accounting Policies [Line Items]                            
Number of countries in which products are sold (over 150) | country 150               150          
Number of operating segments | segment                 4          
Net revenues $ 7,298 $ 6,665 $ 5,911 $ 6,707 $ 6,913 $ 6,355 $ 6,062 $ 6,538 $ 26,581 $ 25,868 $ 25,938      
Number of countries in which entity operates (over 80) | country 80               80          
Restricted cash within other current assets $ 31       37       $ 31 37        
Total cash, cash equivalents and restricted cash 3,650       1,328       3,650 1,328 1,100     $ 761
Outstanding principal amount of receivables sold under factoring arrangement 760       $ 760       760 760 819      
Incremental cost of factoring receivables                 10 10 10      
Lease related assets                         $ 710  
Lease related liabilities                         $ 730  
Advertising expense                 1,376 1,208 1,173      
Research and development expense                 $ 332 351 362      
Europe                            
Summary Of Significant Accounting Policies [Line Items]                            
Weighted-average cost of capital rate                       6.10%    
North America                            
Summary Of Significant Accounting Policies [Line Items]                            
Weighted-average cost of capital rate                       6.10%    
Latin America                            
Summary Of Significant Accounting Policies [Line Items]                            
Risk-rated discount rate                       9.10%    
AMEA                            
Summary Of Significant Accounting Policies [Line Items]                            
Risk-rated discount rate                       9.10%    
Machinery and equipment | Minimum                            
Summary Of Significant Accounting Policies [Line Items]                            
Useful life of long-lived assets                 3 years          
Machinery and equipment | Maximum                            
Summary Of Significant Accounting Policies [Line Items]                            
Useful life of long-lived assets                 20 years          
Buildings and building improvements | Maximum                            
Summary Of Significant Accounting Policies [Line Items]                            
Useful life of long-lived assets                 40 years          
Software | Maximum                            
Summary Of Significant Accounting Policies [Line Items]                            
Useful life of long-lived assets                 7 years          
Argentina                            
Summary Of Significant Accounting Policies [Line Items]                            
Net monetary liabilities $ 3               $ 3          
Net revenues                 $ 335          
Percentage of consolidated net revenues                 1.30%          
U.K. | Geographic Concentration Risk | Net Revenues                            
Summary Of Significant Accounting Policies [Line Items]                            
Concentration risk percentage                 9.00%          
Selling, general and administrative expenses | Argentina                            
Summary Of Significant Accounting Policies [Line Items]                            
Remeasurement (loss) gain due to inflationary accounting                 $ (9) $ 4 $ (11)