Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 110,812	$ 96,145	$ 332,410	$ 260,509
Online stores
Disaggregation of Revenue [Line Items]
Total net sales	49,942	48,350	156,000	130,899
Physical stores
Disaggregation of Revenue [Line Items]
Total net sales	4,269	3,788	12,387	12,201
Third-party seller services
Disaggregation of Revenue [Line Items]
Total net sales	24,252	20,436	73,046	53,121
Subscription services
Disaggregation of Revenue [Line Items]
Total net sales	8,148	6,572	23,645	18,146
AWS
Disaggregation of Revenue [Line Items]
Total net sales	16,110	11,601	44,422	32,628
Other
Disaggregation of Revenue [Line Items]
Total net sales	$ 8,091	$ 5,398	$ 22,910	$ 13,514