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DERIVATIVE INSTRUMENTS (Tables) | 12 Months Ended
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Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | 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 December 31,
|  |  | 2021 |  | 2020
(Millions of Dollars) | Fair Value Hierarchy |  | Commodity 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&P | Level 3 |  | $ | 14.7 |  |  | $ | (1.0) |  |  | $ | 13.7 |  |  | $ | 13.7 |  |  | $ | (0.4) |  |  | $ | 13.3 |
Long-Term Derivative Assets:
CL&P | Level 3 |  | 46.9 |  |  | (0.9) |  |  | 46.0 |  |  | 58.7 |  |  | (1.8) |  |  | 56.9 |
Current Derivative Liabilities:
CL&P | Level 3 |  | (73.5) |  |  | — |  |  | (73.5) |  |  | (68.8) |  |  | — |  |  | (68.8) |
Other | Level 2 |  | — |  |  | — |  |  | — |  |  | (3.3) |  |  | 0.1 |  |  | (3.2) |
Long-Term Derivative Liabilities:
CL&P | Level 3 |  | (235.4) |  |  | — |  |  | (235.4) |  |  | (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.
Fair Value Inputs, Liabilities, Quantitative Information | 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 December 31,
| 2021 |  | 2020
CL&P | Range |  | Weighted Average (1) |  |  |  | Period Covered |  | Range |  | Weighted Average (1) |  |  |  | Period Covered
Capacity Prices | $2.61 |  | $ | 2.61 |  |  | per kW-Month |  | 2025 - 2026 |  | $ | 4.30 |  |  | — |  | $5.30 |  | $ | 4.63 |  |  | per kW-Month |  | 2024 - 2026
Forward Reserve | $ | 0.50 |  |  | — |  | $1.15 |  | $ | 0.82 |  |  | per kW-Month |  | 2022 - 2024 |  | $ | 0.54 |  |  | — |  | $0.90 |  | $ | 0.72 |  |  | per kW-Month |  | 2021 - 2024
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | 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&P (Millions of Dollars) | For the Years Ended December 31,
2021 |  | 2020
Derivatives, Net: |  |  |
Fair Value as of Beginning of Period | $ | (293.1) |  |  | $ | (329.2) |
Net Realized/Unrealized Losses Included in Regulatory Assets | (8.5) |  |  | (17.9) |
Settlements | 52.4 |  |  | 54.0 |
Fair Value as of End of Period | $ | (249.2) |  |  | $ | (293.1) |

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