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MARKETABLE SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract] |
Summary of Available-for-Sale Debt Securities | The following is a summary of the available-for-sale debt securities:
| As of June 30, 2022 |  | As of December 31, 2021
Eversource (Millions of Dollars) | Amortized Cost |  | Pre-Tax Unrealized Gains |  | Pre-Tax Unrealized Losses |  | Fair Value |  | Amortized Cost |  | Pre-Tax Unrealized Gains |  | Pre-Tax Unrealized Losses |  | Fair Value
Debt Securities | $ | 207.9 |  |  | $ | 0.5 |  |  | $ | (12.3) |  |  | $ | 196.1 |  |  | $ | 214.5 |  |  | $ | 5.1 |  |  | $ | (0.2) |  |  | $ | 219.4 |
Contractual Maturities of Available-for-Sale Debt Securities | As of June 30, 2022, the contractual maturities of available-for-sale debt securities were as follows:
Eversource (Millions of Dollars) | Amortized Cost |  | Fair Value
Less than one year (1) | $ | 18.5 |  |  | $ | 18.4 |
One to five years | 57.6 |  |  | 56.7 |
Six to ten years | 41.2 |  |  | 38.0 |
Greater than ten years | 90.6 |  |  | 83.0 |
Total Debt Securities | $ | 207.9 |  |  | $ | 196.1 |
(1) Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets.
Marketable Securities Recorded at Fair Value on a Recurring Basis by Level | The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:
Eversource (Millions of Dollars) | As of June 30, 2022 |  | As of December 31, 2021
Level 1: |  |  |
Mutual Funds and Equities | $ | 208.8 |  |  | $ | 254.2 |
Money Market Funds | 17.2 |  |  | 31.3 |
Total Level 1 | $ | 226.0 |  |  | $ | 285.5 |
Level 2: |  |  |
U.S. Government Issued Debt Securities (Agency and Treasury) | $ | 84.2 |  |  | $ | 81.3 |
Corporate Debt Securities | 54.9 |  |  | 65.3 |
Asset-Backed Debt Securities | 9.6 |  |  | 12.6 |
Municipal Bonds | 13.8 |  |  | 12.3 |
Other Fixed Income Securities | 16.4 |  |  | 16.6 |
Total Level 2 | $ | 178.9 |  |  | $ | 188.1 |
Total Marketable Securities | $ | 404.9 |  |  | $ | 473.6 |

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