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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jan. 01, 2017
Dec. 31, 2014
Income Tax Contingency [Line Items]                    
Provisional discrete net tax benefit           $ (59)        
U.S. tax reform transition tax           1,317 $ 0 $ 0    
Provisional deferred tax benefit           1,311        
Deferred tax benefit related to changes in our indefinite reinvestment assertion           $ 61        
Federal income tax rates           35.00% 35.00% 35.00%    
Unremitted earnings indefinitely reinvested $ 2,000         $ 2,000        
Impact on provision for income tax, out-of-period adjustments               $ 14    
Effective tax rate           22.00% 8.90% 7.50%    
Total favorable discrete items           $ 117 $ 161 $ 119    
Gains on coffee business transactions and divestitures (2) $ (187) $ 3 $ 0   186 9 $ 6,822    
Effective tax rate, excluding the discrete items               17.80%    
Loss carryforwards 4,060         4,060        
Loss carryforwards, expire at various dates between 2018 and 2037 1,105         1,105        
Loss carryforwards, indefinitely 2,955         2,955        
Unrecognized tax benefits 579         579 $ 610 $ 756 $ 610 $ 852
Impact on tax provision from unrecognized tax benefits 524         524     549  
Unrecognized tax benefits reasonably possible increase resulting from unfavorable audit developments           40        
Unrecognized tax benefits reasonably possible decrease resulting from audit settlements and the expiration of statutes of limitations in various jurisdictions 150         150        
Unrecognized tax benefits reasonably possible reductions due to audit settlements and expiration of statutes of limitations           150        
Unrecognized tax benefits, income tax penalties and interest accrued $ 212         212     $ 189  
Net benefit for interest and penalties           $ 26        
Unremitted Foreign Earnings And Profits [Member]                    
Income Tax Contingency [Line Items]                    
Accumulated foreign earnings and profits, percentage           8.00%        
Scenario Forecast                    
Income Tax Contingency [Line Items]                    
Federal income tax rates         21.00%          
Liquid Assets [Member]                    
Income Tax Contingency [Line Items]                    
Accumulated foreign earnings and profits, percentage           15.50%        
Coffee Business                    
Income Tax Contingency [Line Items]                    
Gains on coffee business transactions and divestitures               6,809    
Tax expense on gains from divestitures               184    
Tax costs incurred to remit proceeds up from lower-tier foreign subsidiaries               $ 27