Segment Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 162,648	$ 131,310	$ 83,402
Operating Segments | North America
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	47,251	35,844	22,225
Operating Segments | International
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	19,923	18,014	10,429
Operating Segments | AWS
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	26,340	18,660	12,698
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 69,134	$ 58,792	$ 38,050