Segment Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 321,195	$ 225,248	$ 162,648
Operating Segments | North America
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	108,405	72,277	47,251
Operating Segments | International
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	42,212	30,709	19,923
Operating Segments | AWS
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	47,574	36,500	26,340
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 123,004	$ 85,762	$ 69,134