Document and Entity Information
Nov. 06, 2019
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 06, 2019
Entity Registrant Name TerraForm Power, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-36542
Entity Tax Identification Number 46-4780940
Entity Address, Address Line One 200 Liberty Street
Entity Address, Address Line Two 14th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10281
City Area Code 646
Local Phone Number 992-2400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001599947
Title of 12(b) Security Common Stock, Class A, par value $0.01
Trading Symbol TERP
Security Exchange Name NASDAQ