Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 113,080	$ 88,912	$ 221,598	$ 164,364
Online stores
Disaggregation of Revenue [Line Items]
Total net sales	53,157	45,896	106,058	82,549
Physical stores
Disaggregation of Revenue [Line Items]
Total net sales	4,198	3,774	8,118	8,414
Third-party seller services
Disaggregation of Revenue [Line Items]
Total net sales	25,085	18,195	48,794	32,676
Subscription services
Disaggregation of Revenue [Line Items]
Total net sales	7,917	6,018	15,497	11,574
AWS
Disaggregation of Revenue [Line Items]
Total net sales	14,809	10,808	28,312	21,027
Other
Disaggregation of Revenue [Line Items]
Total net sales	$ 7,914	$ 4,221	$ 14,819	$ 8,124