Acquisitions, Goodwill, and Acquired Intangible Assets - Pro Forma Financial Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Net sales	$ 127,441	$ 103,476
Net income	1,137	$ 1,597
Other 2017 Acquisitions
Business Acquisition [Line Items]
Aggregate net sales of companies acquired	222
Aggregate operating income (loss) of companies acquired	(80)
Whole Foods Market, Inc [Member]
Business Acquisition [Line Items]
Aggregate net sales of companies acquired	1,300
Aggregate operating income (loss) of companies acquired	$ 21