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Component: (Network and Table)
Network
2413404 - Disclosure - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)
(http://www.acceleronpharma.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateReconciliationDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001280600 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Federal income tax expense at statutory rate
34.00%  
34.00%  
34.00%  
State income tax, net of federal benefit
5.90%  
4.60%  
4.10%  
Permanent differences
4.00%  
(8.30%) 
2.00%  
Research and development credit
3.10%  
1.20%  
1.60%  
Other
(0.10%) 
0.00%  
4.60%  
Change in valuation allowance
(46.90%) 
(31.50%) 
(46.30%) 
Effective income tax rate
0.00%  
 
0.00%  
 
0.00%