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2409403 - Disclosure - Stockholders' Equity Restricted Stock Unit Activity (Detail)
(http://www.amazon.com/role/StockholdersEquityRestrictedStockUnitActivityDetail)
TableSchedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001018724 (http://www.sec.gov/CIK)
Award Type [Axis]Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Number of units
 
 
 
Beginning balance (in shares)
18,900,000  
17,400,000  
16,300,000  
Units granted (in shares)
9,300,000  
9,800,000  
8,500,000  
Units vested (in shares)
(6,100,000) 
(5,600,000) 
(5,100,000) 
Units forfeited (in shares)
(2,300,000) 
(2,700,000) 
(2,300,000) 
Ending balance (in shares)
19,800,000  
 
18,900,000  
 
17,400,000  
 
Weighted Average Grant-Date Fair Value
 
 
 
Beginning balance (in usd per share)
362  
285  
233  
Units granted (in usd per share)
660  
426  
328  
Units vested (in usd per share)
321  
253  
202  
Units forfeited (in usd per share)
440  
321  
264  
Ending balance (in usd per share)
506  
362  
285