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DERIVATIVE INSTRUMENTS (Tables)
6 Months Ended
Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Gross Fair Values and Net Amounts of Contracts The following table presents the gross fair values of contracts, categorized by risk type, and the net amounts recorded as current or long-term derivative assets or liabilities:
 As of June 30, 2021As of December 31, 2020
(Millions of Dollars)Fair Value HierarchyCommodity Supply and Price Risk
Management
Netting (1)
Net Amount
Recorded as a Derivative
Commodity Supply and Price Risk
Management
Netting (1)
Net Amount
Recorded as
a Derivative
Current Derivative Assets:      
CL&PLevel 3$14.1 $(0.4)$13.7 $13.7 $(0.4)$13.3 
Long-Term Derivative Assets:    
CL&PLevel 355.0 (1.7)53.3 58.7 (1.8)56.9 
Current Derivative Liabilities:    
CL&PLevel 3(70.9)— (70.9)(68.8)— (68.8)
OtherLevel 2— — — (3.3)0.1 (3.2)
Long-Term Derivative Liabilities:    
CL&PLevel 3(275.8)— (275.8)(294.5)— (294.5)
    

(1)    Amounts represent derivative assets and liabilities that Eversource elected to record net on the balance sheets.  These amounts are subject to master netting agreements or similar agreements for which the right of offset exists.
Summary of Level 3 Derivative Contracts and Significant Unobservable Inputs Used
The following is a summary of Level 3 derivative contracts and the range of the significant unobservable inputs utilized in the valuations over the duration of the contracts:
 As of June 30, 2021As of December 31, 2020
CL&PRange
Weighted Average (1)
Period CoveredRange
Weighted Average (1)
Period Covered
Capacity Prices$2.61$2.61 per kW-Month2025 - 2026$4.30 $5.30$4.63 per kW-Month2024 - 2026
Forward Reserve Prices$0.54 $0.90$0.72 per kW-Month2021 - 2024$0.54 $0.90$0.72 per kW-Month2021 - 2024

(1)    Unobservable inputs were weighted by the relative future capacity and forward reserve prices and contractual MWs over the periods covered.
Changes in the Level 3 Category of Derivative Assets Measured at Fair Value on a Recurring Basis
The following table presents changes in the Level 3 category of derivative assets and derivative liabilities measured at fair value on a recurring basis.  The derivative assets and liabilities are presented on a net basis.
CL&PFor the Three Months Ended June 30,For the Six Months Ended June 30,
(Millions of Dollars)2021202020212020
Derivatives, Net:  
Fair Value as of Beginning of Period$(293.1)$(333.8)$(293.1)$(329.2)
Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets0.9 (1.3)(11.5)(17.6)
Settlements12.5 13.1 24.9 24.8 
Fair Value as of End of Period$(279.7)$(322.0)$(279.7)$(322.0)