XML 108 R89.htm IDEA: XBRL DOCUMENT v3.22.2
COMMITMENTS AND CONTINGENCIES - Guarantees and Obligations Narrative (Details) - USD ($)
Jun. 30, 2022
Jan. 31, 2022
Dec. 31, 2021
Sep. 16, 2020
Loss Contingencies [Line Items]        
Fair value of guarantees $ 4,700,000   $ 7,300,000  
Letter of Credit | South Fork Wind, LLC        
Loss Contingencies [Line Items]        
Amount outstanding under line of credit   $ 4,300,000    
Letter of Credit | Eversource Investment LLC        
Loss Contingencies [Line Items]        
Maximum borrowing capacity       $ 25,000,000