Rendering

Component: (Network and Table)
Network
100430 - Disclosure - Property Plant and Equipment Net (Detail)
(http://www.alnylam.com/20161231/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001178670 (http://www.sec.gov/CIK)
Property Plant And Equipment [Abstract]Period [Axis]
2016-12-31
2015-12-31
Property Plant And Equipment [Abstract]
 
 
Laboratory equipment
37,303,000  
33,558,000  
Computer equipment and software
9,650,000  
5,732,000  
Furniture and fixtures
6,002,000  
2,906,000  
Leasehold improvements
45,362,000  
35,825,000  
Land
9,080,000  
 
Construction in progress
68,182,000  
1,285,000  
Property, Plant and Equipment Gross
175,579,000  
 
79,306,000  
 
Less: accumulated depreciation
(61,007,000) 
(51,494,000) 
Property, Plant and Equipment, Net
114,572,000  
 
27,812,000