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REGULATORY ACCOUNTING (Tables) | 12 Months Ended
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Dec. 31, 2024
Regulated Operations [Abstract] |
Components of Regulatory Assets | The components of regulatory assets were as follows:
| As of December 31,
| 2024 |  | 2023
(Millions of Dollars) | Eversource |  | CL&P |  | NSTAR Electric |  | PSNH |  | Eversource |  | CL&P |  | NSTAR Electric |  | PSNH
Storm Costs, Net | $ | 2,039.4 |  |  | $ | 971.1 |  |  | $ | 609.8 |  |  | $ | 458.5 |  |  | $ | 1,785.9 |  |  | $ | 896.6 |  |  | $ | 609.1 |  |  | $ | 280.2 |
Regulatory Tracking Mechanisms | 1,781.6 |  |  | 507.7 |  |  | 650.0 |  |  | 162.8 |  |  | 1,319.2 |  |  | 354.5 |  |  | 482.9 |  |  | 182.2 |
Benefit Costs | 967.4 |  |  | 168.8 |  |  | 293.6 |  |  | 65.6 |  |  | 1,117.3 |  |  | 197.4 |  |  | 336.7 |  |  | 79.3 |
Income Taxes, Net | 968.4 |  |  | 521.0 |  |  | 145.4 |  |  | 20.7 |  |  | 912.4 |  |  | 512.6 |  |  | 128.6 |  |  | 16.4 |
Securitized Stranded Costs | 349.3 |  |  | — |  |  | — |  |  | 349.3 |  |  | 392.5 |  |  | — |  |  | — |  |  | 392.5 |
Goodwill-related | 247.2 |  |  | — |  |  | 212.3 |  |  | — |  |  | 264.1 |  |  | — |  |  | 226.7 |  |  | — |
Asset Retirement Obligations | 150.2 |  |  | 41.2 |  |  | 78.3 |  |  | 5.1 |  |  | 137.9 |  |  | 38.5 |  |  | 72.3 |  |  | 4.7 |
Derivative Liabilities | 57.2 |  |  | 57.2 |  |  | — |  |  | — |  |  | 120.9 |  |  | 120.9 |  |  | — |  |  | — |
Other Regulatory Assets | 510.0 |  |  | 58.5 |  |  | 117.7 |  |  | 3.7 |  |  | 339.0 |  |  | 22.7 |  |  | 101.6 |  |  | 8.0 |
Total Regulatory Assets | 7,070.7 |  |  | 2,325.5 |  |  | 2,107.1 |  |  | 1,065.7 |  |  | 6,389.2 |  |  | 2,143.2 |  |  | 1,957.9 |  |  | 963.3 |
Less: Current Portion | 2,189.7 |  |  | 638.5 |  |  | 902.8 |  |  | 173.3 |  |  | 1,674.2 |  |  | 480.4 |  |  | 676.1 |  |  | 189.5 |
Total Long-Term Regulatory Assets | $ | 4,881.0 |  |  | $ | 1,687.0 |  |  | $ | 1,204.3 |  |  | $ | 892.4 |  |  | $ | 4,715.0 |  |  | $ | 1,662.8 |  |  | $ | 1,281.8 |  |  | $ | 773.8 |
Components of Regulatory Liabilities | The components of regulatory liabilities were as follows:
| As of December 31,
| 2024 |  | 2023
(Millions of Dollars) | Eversource |  | CL&P |  | NSTAR Electric |  | PSNH |  | Eversource |  | CL&P |  | NSTAR Electric |  | PSNH
EDIT due to Tax Cuts and Jobs Act of 2017 | $ | 2,442.7 |  |  | $ | 956.6 |  |  | $ | 877.6 |  |  | $ | 330.6 |  |  | $ | 2,548.6 |  |  | $ | 969.2 |  |  | $ | 905.1 |  |  | $ | 339.3 |
Regulatory Tracking Mechanisms | 702.4 |  |  | 180.3 |  |  | 413.6 |  |  | 114.4 |  |  | 668.3 |  |  | 154.0 |  |  | 347.2 |  |  | 114.4 |
Cost of Removal | 684.1 |  |  | 212.8 |  |  | 451.3 |  |  | 20.1 |  |  | 666.6 |  |  | 157.9 |  |  | 420.9 |  |  | 16.2 |
Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP | 427.1 |  |  | 61.6 |  |  | 211.6 |  |  | 42.6 |  |  | 354.0 |  |  | 49.9 |  |  | 175.9 |  |  | 36.6 |
AFUDC - Transmission | 154.8 |  |  | 65.1 |  |  | 89.7 |  |  | — |  |  | 124.3 |  |  | 56.1 |  |  | 68.2 |  |  | — |
Benefit Costs | 69.3 |  |  | 4.5 |  |  | 21.4 |  |  | 3.9 |  |  | 51.0 |  |  | 0.6 |  |  | 22.2 |  |  | — |
Other Regulatory Liabilities | 184.5 |  |  | 39.1 |  |  | 14.2 |  |  | 4.5 |  |  | 201.9 |  |  | 30.4 |  |  | 13.9 |  |  | 4.6 |
Total Regulatory Liabilities | 4,664.9 |  |  | 1,520.0 |  |  | 2,079.4 |  |  | 516.1 |  |  | 4,614.7 |  |  | 1,418.1 |  |  | 1,953.4 |  |  | 511.1 |
Less: Current Portion | 632.3 |  |  | 124.1 |  |  | 436.3 |  |  | 121.1 |  |  | 591.8 |  |  | 102.2 |  |  | 368.1 |  |  | 117.5 |
Total Long-Term Regulatory Liabilities | $ | 4,032.6 |  |  | $ | 1,395.9 |  |  | $ | 1,643.1 |  |  | $ | 395.0 |  |  | $ | 4,022.9 |  |  | $ | 1,315.9 |  |  | $ | 1,585.3 |  |  | $ | 393.6 |

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