Segment Information Disaggregation of Revenue - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 51,042	$ 35,714
Online stores (1)
Disaggregation of Revenue [Line Items]
Net sales	26,939	22,826
Physical stores (2)
Disaggregation of Revenue [Line Items]
Net sales	4,263	0
Third-party seller services (3)
Disaggregation of Revenue [Line Items]
Net sales	9,265	6,438
Subscription services (4)
Disaggregation of Revenue [Line Items]
Net sales	3,102	1,939
AWS
Disaggregation of Revenue [Line Items]
Net sales	5,442	3,661
Other (5)
Disaggregation of Revenue [Line Items]
Net sales	$ 2,031	$ 850