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REGULATORY ACCOUNTING (Tables) | 12 Months Ended
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Dec. 31, 2023
Regulated Operations [Abstract] |
Components of Regulatory Assets | The components of regulatory assets were as follows:
| As of December 31,
| 2023 |  | 2022
(Millions of Dollars) | Eversource |  | CL&P |  | NSTAR Electric |  | PSNH |  | Eversource |  | CL&P |  | NSTAR Electric |  | PSNH
Storm Costs, Net | $ | 1,785.9 |  |  | $ | 896.6 |  |  | $ | 609.1 |  |  | $ | 280.2 |  |  | $ | 1,379.1 |  |  | $ | 799.3 |  |  | $ | 484.4 |  |  | $ | 95.4 |
Regulatory Tracking Mechanisms | 1,319.2 |  |  | 354.5 |  |  | 482.9 |  |  | 182.2 |  |  | 1,075.3 |  |  | 216.8 |  |  | 391.5 |  |  | 73.7 |
Benefit Costs | 1,117.3 |  |  | 197.4 |  |  | 336.7 |  |  | 79.3 |  |  | 921.7 |  |  | 156.7 |  |  | 299.5 |  |  | 56.6 |
Income Taxes, Net | 912.4 |  |  | 512.6 |  |  | 128.6 |  |  | 16.4 |  |  | 853.3 |  |  | 491.1 |  |  | 115.6 |  |  | 16.0 |
Securitized Stranded Costs | 392.5 |  |  | — |  |  | — |  |  | 392.5 |  |  | 435.7 |  |  | — |  |  | — |  |  | 435.7 |
Goodwill-related | 264.1 |  |  | — |  |  | 226.7 |  |  | — |  |  | 281.0 |  |  | — |  |  | 241.2 |  |  | — |
Asset Retirement Obligations | 137.9 |  |  | 38.5 |  |  | 72.3 |  |  | 4.7 |  |  | 127.9 |  |  | 35.9 |  |  | 68.2 |  |  | 4.4 |
Derivative Liabilities | 120.9 |  |  | 120.9 |  |  | — |  |  | — |  |  | 181.8 |  |  | 181.8 |  |  | — |  |  | — |
Other Regulatory Assets | 339.0 |  |  | 22.7 |  |  | 101.6 |  |  | 8.0 |  |  | 322.5 |  |  | 26.2 |  |  | 114.0 |  |  | 14.4 |
Total Regulatory Assets | 6,389.2 |  |  | 2,143.2 |  |  | 1,957.9 |  |  | 963.3 |  |  | 5,578.3 |  |  | 1,907.8 |  |  | 1,714.4 |  |  | 696.2 |
Less: Current Portion | 1,674.2 |  |  | 480.4 |  |  | 676.1 |  |  | 189.5 |  |  | 1,335.5 |  |  | 314.1 |  |  | 492.8 |  |  | 102.2 |
Total Long-Term Regulatory Assets | $ | 4,715.0 |  |  | $ | 1,662.8 |  |  | $ | 1,281.8 |  |  | $ | 773.8 |  |  | $ | 4,242.8 |  |  | $ | 1,593.7 |  |  | $ | 1,221.6 |  |  | $ | 594.0 |
Components of Regulatory Liabilities | The components of regulatory liabilities were as follows:
| As of December 31,
| 2023 |  | 2022
(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 | $ | 2,548.6 |  |  | $ | 969.2 |  |  | $ | 905.1 |  |  | $ | 339.3 |  |  | $ | 2,619.3 |  |  | $ | 983.6 |  |  | $ | 944.3 |  |  | $ | 348.6 |
Cost of Removal | 666.6 |  |  | 157.9 |  |  | 420.9 |  |  | 16.2 |  |  | 670.6 |  |  | 130.8 |  |  | 405.3 |  |  | 14.7 |
Regulatory Tracking Mechanisms | 668.3 |  |  | 154.0 |  |  | 347.2 |  |  | 114.4 |  |  | 890.8 |  |  | 361.0 |  |  | 336.1 |  |  | 155.0 |
Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP | 354.0 |  |  | 49.9 |  |  | 175.9 |  |  | 36.6 |  |  | 270.9 |  |  | 34.5 |  |  | 139.7 |  |  | 28.8 |
AFUDC - Transmission | 124.3 |  |  | 56.1 |  |  | 68.2 |  |  | — |  |  | 98.2 |  |  | 48.2 |  |  | 50.0 |  |  | — |
Benefit Costs | 51.0 |  |  | 0.6 |  |  | 22.2 |  |  | — |  |  | 55.4 |  |  | 0.7 |  |  | 31.4 |  |  | — |
Other Regulatory Liabilities | 201.9 |  |  | 30.4 |  |  | 13.9 |  |  | 4.6 |  |  | 215.9 |  |  | 40.6 |  |  | 14.5 |  |  | 6.5 |
Total Regulatory Liabilities | 4,614.7 |  |  | 1,418.1 |  |  | 1,953.4 |  |  | 511.1 |  |  | 4,821.1 |  |  | 1,599.4 |  |  | 1,921.3 |  |  | 553.6 |
Less: Current Portion | 591.8 |  |  | 102.2 |  |  | 368.1 |  |  | 117.5 |  |  | 890.8 |  |  | 336.0 |  |  | 373.2 |  |  | 162.0 |
Total Long-Term Regulatory Liabilities | $ | 4,022.9 |  |  | $ | 1,315.9 |  |  | $ | 1,585.3 |  |  | $ | 393.6 |  |  | $ | 3,930.3 |  |  | $ | 1,263.4 |  |  | $ | 1,548.1 |  |  | $ | 391.6 |

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