Equity Method Investments - Additional Information (Detail) (LivingSocial, USD $) In Millions, unless otherwise specified	Jun. 30, 2014
LivingSocial
Schedule of Equity Method Investments [Line Items]
Equity and cost investment, ownership percentage	31.00%
Equity and cost investment, book value	$ 94

Equity And Cost Method Investment Ownership Percentage

No definition available.

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Namespace Prefix:	amzn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant