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COMMITMENTS AND CONTINGENCIES - Schedule of Estimated Future Annual Costs of Long term Contractual Agreement (Details) $ in Millions | Dec. 31, 2022 USD ($)
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Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | $ 1,324.6
2024 | 1,500.6
2025 | 1,411.4
2026 | 1,323.0
2027 | 1,304.6
Thereafter | 9,685.9
Total | 16,550.1
Renewable Energy Purchase Contracts |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 751.8
2024 | 952.6
2025 | 954.8
2026 | 983.0
2027 | 998.5
Thereafter | 8,141.1
Total | 12,781.8
Natural Gas Procurement |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 447.1
2024 | 419.4
2025 | 340.9
2026 | 298.5
2027 | 269.4
Thereafter | 1,450.6
Total | 3,225.9
Purchased Power and Capacity |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 87.6
2024 | 86.8
2025 | 75.2
2026 | 2.9
2027 | 2.7
Thereafter | 7.2
Total | 262.4
Peaker CfDs |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 20.3
2024 | 21.1
2025 | 17.9
2026 | 16.0
2027 | 11.4
Thereafter | 64.4
Total | 151.1
Transmission Support Commitments |
Transmission Support Commitments |
2023 | 17.8
2024 | 20.7
2025 | 22.6
2026 | 22.6
2027 | 22.6
Thereafter | 22.6
Total | 128.9
CL&P |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 705.6
2024 | 722.3
2025 | 709.4
2026 | 632.6
2027 | 629.3
Thereafter | 2,326.4
Total | 5,725.6
CL&P | Renewable Energy Purchase Contracts |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 594.8
2024 | 609.1
2025 | 610.2
2026 | 607.6
2027 | 609.0
Thereafter | 2,253.1
Total | 5,283.8
CL&P | Purchased Power and Capacity |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 83.5
2024 | 83.9
2025 | 72.4
2026 | 0.1
2027 | 0.0
Thereafter | 0.0
Total | 239.9
CL&P | Peaker CfDs |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 20.3
2024 | 21.1
2025 | 17.9
2026 | 16.0
2027 | 11.4
Thereafter | 64.4
Total | 151.1
CL&P | Transmission Support Commitments |
Transmission Support Commitments |
2023 | 7.0
2024 | 8.2
2025 | 8.9
2026 | 8.9
2027 | 8.9
Thereafter | 8.9
Total | 50.8
NSTAR Electric |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 89.1
2024 | 281.0
2025 | 328.2
2026 | 334.6
2027 | 340.2
Thereafter | 5,535.9
Total | 6,909.0
NSTAR Electric | Renewable Energy Purchase Contracts |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 79.2
2024 | 270.0
2025 | 316.5
2026 | 322.9
2027 | 328.6
Thereafter | 5,519.8
Total | 6,837.0
NSTAR Electric | Purchased Power and Capacity |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 2.9
2024 | 2.9
2025 | 2.8
2026 | 2.8
2027 | 2.7
Thereafter | 7.2
Total | 21.3
NSTAR Electric | Transmission Support Commitments |
Transmission Support Commitments |
2023 | 7.0
2024 | 8.1
2025 | 8.9
2026 | 8.9
2027 | 8.9
Thereafter | 8.9
Total | 50.7
PSNH |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 82.8
2024 | 77.9
2025 | 32.9
2026 | 57.3
2027 | 65.7
Thereafter | 373.0
Total | 689.6
PSNH | Renewable Energy Purchase Contracts |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 77.8
2024 | 73.5
2025 | 28.1
2026 | 52.5
2027 | 60.9
Thereafter | 368.2
Total | 661.0
PSNH | Purchased Power and Capacity |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2023 | 1.2
2024 | 0.0
2025 | 0.0
2026 | 0.0
2027 | 0.0
Thereafter | 0.0
Total | 1.2
PSNH | Transmission Support Commitments |
Transmission Support Commitments |
2023 | 3.8
2024 | 4.4
2025 | 4.8
2026 | 4.8
2027 | 4.8
Thereafter | 4.8
Total | $ 27.4

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