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LEASES - Other Information Related to Leases (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Weighted-Average Remaining Lease Term (Years): |  |  |
Operating Leases | 11 years | 13 years |
Finance Leases | 15 years | 16 years |
Weighted-Average Discount Rate (Percentage): |  |  |
Operating Leases | 3.20% | 4.10% |
Finance Leases | 2.70% | 2.70% |
Cash Paid for Amounts Included in the Measurement of Lease Liabilities: |  |  |
Operating Cash Flows from Operating Leases | $ 11.3 | $ 12.1 | $ 10.9
Operating Cash Flows from Finance Leases | 2.0 | 3.4 | 1.7
Financing Cash Flows from Finance Leases | 3.9 | 4.1 | 2.8
Supplemental Non-Cash Information on Lease Liabilities: |  |  |
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities | 18.9 | 2.1 | 0.6
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities | $ 3.5 | $ 2.3 | 0.7
CL&P |  |  |
Weighted-Average Remaining Lease Term (Years): |  |  |
Operating Leases | 4 years | 7 years |
Weighted-Average Discount Rate (Percentage): |  |  |
Operating Leases | 3.80% | 3.00% |
Finance Leases | 0.00% | 0.00% |
Cash Paid for Amounts Included in the Measurement of Lease Liabilities: |  |  |
Operating Cash Flows from Operating Leases | $ 0.3 | $ 0.3 | 0.6
Operating Cash Flows from Finance Leases | 0.0 | 0.1 | 0.3
Financing Cash Flows from Finance Leases | 0.0 | 1.4 | 1.6
Supplemental Non-Cash Information on Lease Liabilities: |  |  |
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities | 2.4 | 0.0 | 0.1
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities | $ 0.0 | $ 0.0 | 0.0
NSTAR Electric |  |  |
Weighted-Average Remaining Lease Term (Years): |  |  |
Operating Leases | 17 years | 18 years |
Finance Leases | 19 years | 20 years |
Weighted-Average Discount Rate (Percentage): |  |  |
Operating Leases | 4.00% | 4.00% |
Finance Leases | 2.90% | 2.90% |
Cash Paid for Amounts Included in the Measurement of Lease Liabilities: |  |  |
Operating Cash Flows from Operating Leases | $ 2.1 | $ 2.1 | 1.8
Operating Cash Flows from Finance Leases | 0.6 | 0.6 | 0.6
Financing Cash Flows from Finance Leases | 0.0 | 0.0 | 0.0
Supplemental Non-Cash Information on Lease Liabilities: |  |  |
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities | 0.0 | 1.9 | 0.2
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities | $ 0.0 | $ 0.0 | 0.3
PSNH |  |  |
Weighted-Average Remaining Lease Term (Years): |  |  |
Operating Leases |  | 7 years |
Finance Leases |  | 7 years |
Weighted-Average Discount Rate (Percentage): |  |  |
Operating Leases | 0.00% | 3.70% |
Finance Leases | 0.00% | 3.50% |
Cash Paid for Amounts Included in the Measurement of Lease Liabilities: |  |  |
Operating Cash Flows from Operating Leases | $ 0.1 | $ 0.1 | 0.1
Operating Cash Flows from Finance Leases | 0.0 | 0.0 | 0.0
Financing Cash Flows from Finance Leases | 0.1 | 0.1 | 0.1
Supplemental Non-Cash Information on Lease Liabilities: |  |  |
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities | 0.0 | 0.0 | 0.0
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities | $ 0.0 | $ 0.0 | $ 0.0

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