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Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Country
Subsidiary
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
Country
Subsidiary
Segment
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Summary Of Significant Accounting Policies [Line Items]                        
Number of countries in which products are sold | Country 160                 160    
After-tax equity method investment net earnings $ 224,000,000 $ 103,000,000 $ 67,000,000 $ 66,000,000 $ 83,000,000 $ 31,000,000 $ 102,000,000 $ 85,000,000   $ 460,000,000 $ 301,000,000 $ 0
Number of reportable segments | Segment                   4    
Number of consolidated subsidiaries subject to highly inflationary accounting | Subsidiary 0                 0    
Net revenues $ 6,966,000,000 $ 6,530,000,000 $ 5,986,000,000 $ 6,414,000,000 6,770,000,000 $ 6,396,000,000 $ 6,302,000,000 $ 6,455,000,000   $ 25,896,000,000 [1] 25,923,000,000 [1] 29,636,000,000 [1]
Loss on deconsolidation                   $ 0 0 (778,000,000)
Number of countries in which entity operates | Country 80                 80    
Uncommitted revolving non-recourse accounts receivable factoring arrangements, maximum combined capacity $ 1,000,000,000                 $ 1,000,000,000    
Outstanding principal amount of receivables sold under factoring arrangement $ 804,000,000       $ 570,000,000       $ 644,000,000 804,000,000 570,000,000 644,000,000
Change in accounting policy effect of change on net revenue                       76,000,000
Change in accounting policy effect of change on operating results                       36,000,000
Advertising expense                   1,248,000,000 1,396,000,000 1,542,000,000
Research and development expense                   $ 366,000,000 376,000,000 409,000,000
Minimum likelihood of tax benefits being recognized upon settlement 50.00%                 50.00%    
Maximum                        
Summary Of Significant Accounting Policies [Line Items]                        
After-tax equity method investment net earnings                 $ 1,000,000      
Total incremental cost of factoring receivables                   $ 6,000,000 $ 6,000,000 6,000,000
Maximum | Machinery and Equipment                        
Summary Of Significant Accounting Policies [Line Items]                        
Useful life, in years                   20 years    
Maximum | Buildings and Building Improvements                        
Summary Of Significant Accounting Policies [Line Items]                        
Useful life, in years                   40 years    
Maximum | Software                        
Summary Of Significant Accounting Policies [Line Items]                        
Useful life, in years                   7 years    
Minimum | Machinery and Equipment                        
Summary Of Significant Accounting Policies [Line Items]                        
Useful life, in years                   3 years    
Argentina                        
Summary Of Significant Accounting Policies [Line Items]                        
Net revenues                   $ 601,000,000    
Percentage of consolidated net revenues                   2.30%    
Ukraine                        
Summary Of Significant Accounting Policies [Line Items]                        
Net revenues                   $ 73,000,000    
Percentage of consolidated net revenues                   0.30%    
Ukraine | Maximum                        
Summary Of Significant Accounting Policies [Line Items]                        
Three-year cumulative inflation rate 100.00%   100.00%             100.00%    
Venezuela                        
Summary Of Significant Accounting Policies [Line Items]                        
Net revenues                       1,217,000,000
Loss on deconsolidation                       $ (778,000,000)
North America and Europe                        
Summary Of Significant Accounting Policies [Line Items]                        
Discount rate                   7.20%    
Latin America and AMEA                        
Summary Of Significant Accounting Policies [Line Items]                        
Discount rate                   10.20%    
[1] In 2015, our consolidated net revenues included Venezuela net revenues of $763 million in biscuits, $340 million in cheese & grocery, $66 million in gum & candy and $48 million in beverages. Following the deconsolidation of our Venezuela operations at the end of 2015, our 2016 and 2017 consolidated net revenues no longer include the net revenues of our Venezuelan subsidiaries. Refer to Note 1, Summary of Significant Accounting Policies - Currency Translation and Highly Inflationary Accounting: Venezuela, for more information.