Rendering

Component: (Network and Table)
Network
100590 - Disclosure - Accrued Expenses (Detail)
(http://www.alnylam.com/20161231/taxonomy/role/DisclosureAccruedExpensesDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001178670 (http://www.sec.gov/CIK)
Accrued Liabilities Current [Abstract]Period [Axis]
2016-12-31
2015-12-31
Accrued Liabilities Current [Abstract]
 
 
Compensation and related
13,689,000  
11,157,000  
Clinical trial and manufacturing
11,756,000  
10,885,000  
Consulting and professional services
2,788,000  
892,000  
Pre-clinical
1,257,000  
899,000  
Other
12,628,000  
4,965,000  
Accrued expenses
42,118,000  
 
28,798,000