XML 89 R70.htm IDEA: XBRL DOCUMENT v3.22.2
DERIVATIVE INSTRUMENTS - Gross Fair Values and Net Amounts of Contracts (Details) - CL&P - Level 3 - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Current Derivative Assets    
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]    
Commodity Supply and Price Risk Management $ 15.2 $ 14.7
Netting (0.5) (1.0)
Net Amount Recorded as a Derivative 14.7 13.7
Other Long-Term Assets    
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]    
Commodity Supply and Price Risk Management 37.7 46.9
Netting (1.1) (0.9)
Net Amount Recorded as a Derivative 36.6 46.0
Current Derivative Liabilities    
Current and Long-Term Derivative Liabilities    
Commodity Supply and Price Risk Management (75.9) (73.5)
Netting 0.0 0.0
Net Amount Recorded as a Derivative (75.9) (73.5)
Long-Term Derivative Liabilities    
Current and Long-Term Derivative Liabilities    
Commodity Supply and Price Risk Management (188.7) (235.4)
Netting 0.0 0.0
Net Amount Recorded as a Derivative $ (188.7) $ (235.4)