v3.7.0.1
Document and Entity Information Document and Entity Information - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2016
Jun. 30, 2017
Document Information [Line Items]    
Entity Registrant Name TerraForm Power, Inc.  
Entity Central Index Key 0001599947  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-K  
Document Period End Date Dec. 31, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus FY  
Amendment Flag false  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status No  
Entity Public Float   $ 1.1
Class A Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   92,268,474
Class B common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   48,202,310