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Acquisitions, Goodwill, and Acquired Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 28, 2017
May 12, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]          
Fair value of assumed stock options and restricted stock options     $ 0 $ 0 $ 9
Amortization expense for acquired intangibles     366 287 270
Series of Individually Immaterial Business Acquisitions          
Business Acquisition [Line Items]          
Aggregate purchase price     787 $ 103 $ 690
Acquisitions, net of cash acquired     683    
Souq          
Business Acquisition [Line Items]          
Acquisitions, net of cash acquired   $ 583      
Whole Foods Market          
Business Acquisition [Line Items]          
Aggregate purchase price     13,176    
Acquisitions, net of cash acquired $ 13,176   13,176    
Other Immaterial Business Acquisitions          
Business Acquisition [Line Items]          
Aggregate purchase price     $ 204