Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Total net sales	$ 56,576	$ 43,744	$ 160,504	$ 117,413
Operating expenses:
Cost of sales	33,003	27,549	94,370	73,439
Fulfillment	8,275	6,420	23,999	16,275
Marketing	3,303	2,479	8,902	6,629
Technology and content	7,162	5,944	21,168	16,306
General and administrative	1,041	960	3,219	2,630
Other operating expense, net	68	45	211	155
Total operating expenses	52,852	43,397	151,869	115,434
Operating income	3,724	347	8,635	1,979
Interest income	117	54	290	137
Interest expense	(358)	(228)	(1,030)	(510)
Other income (expense), net	(93)	143	16	329
Total non-operating income (expense)	(334)	(31)	(724)	(44)
Income before income taxes	3,390	316	7,911	1,935
Provision for income taxes	(508)	(58)	(870)	(755)
Equity-method investment activity, net of tax	1	(2)	5	(4)
Net income	$ 2,883	$ 256	$ 7,046	$ 1,176
Basic earnings per share	$ 5.91	$ 0.53	$ 14.49	$ 2.46
Diluted earnings per share	$ 5.75	$ 0.52	$ 14.10	$ 2.39
Weighted-average shares used in computation of earnings per share:
Basic (in shares)	488	481	486	479
Diluted (in shares)	501	494	500	492
Product [Member]
Total net sales	$ 33,746	$ 28,768	$ 97,215	$ 77,248
Service [Member]
Total net sales	$ 22,830	$ 14,976	$ 63,289	$ 40,165