Commitments and Contingencies - Pledged Assets (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Assets pledged or otherwise restricted	$ 882	$ 875

Securities And Fixed Assets Owned And Pledged As Collateral, Book Value

No definition available.

Name:	amzn_SecuritiesAndFixedAssetsOwnedAndPledgedAsCollateralBookValue
Namespace Prefix:	amzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant