v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Apr. 15, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 000-55610    
Entity Registrant Name GREENBACKER RENEWABLE ENERGY COMPANY LLC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 80-0872648    
Entity Address, Address Line One 230 Park Avenue    
Entity Address, Address Line Two Suite 1560    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10169    
City Area Code 646    
Local Phone Number 720-9463    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   199,192,235  
Entity Central Index Key 0001563922    
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Public Float     $ 0
Class A      
Document Information [Line Items]      
Title of 12(g) Security Class A Shares of Limited Liability Company Interests    
No Trading Symbol Flag true    
Class C      
Document Information [Line Items]      
Title of 12(g) Security Class C Shares of Limited Liability Company Interests    
No Trading Symbol Flag true    
Class I      
Document Information [Line Items]      
Title of 12(g) Security Class I Shares of Limited Liability Company Interests    
No Trading Symbol Flag true