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LEASES - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Operating Leases: |  |
Right-of-use-Assets, Net | $ 56.9 | $ 47.2
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other Long-Term Assets | Other Long-Term Assets
Current Portion | $ 9.0 | $ 10.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other Current Liabilities | Other Current Liabilities
Long-Term | $ 47.9 | $ 37.2
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Long-Term Liabilities | Other Long-Term Liabilities
Total Operating Lease Liabilities | $ 56.9 | $ 47.2
Finance Leases: |  |
Right-of-use-Assets, Net | $ 54.5 | $ 58.0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property, Plant and Equipment, Net | Property, Plant and Equipment, Net
Current Portion | $ 3.8 | $ 3.9
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other Current Liabilities | Other Current Liabilities
Long-Term | $ 54.2 | $ 55.4
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Long-Term Liabilities | Other Long-Term Liabilities
Total Finance Lease Liabilities | $ 58.0 | $ 59.3
CL&P |  |
Operating Leases: |  |
Right-of-use-Assets, Net | 2.2 | 0.1
Current Portion | 0.6 | 0.1
Long-Term | 1.6 | 0.0
Total Operating Lease Liabilities | 2.2 | 0.1
Finance Leases: |  |
Right-of-use-Assets, Net | 0.0 | 0.0
Current Portion | 0.0 | 0.0
Long-Term | 0.0 | 0.0
Total Finance Lease Liabilities | 0.0 | 0.0
NSTAR Electric |  |
Operating Leases: |  |
Right-of-use-Assets, Net | 22.5 | 24.3
Current Portion | 1.2 | 1.1
Long-Term | 21.3 | 23.2
Total Operating Lease Liabilities | 22.5 | 24.3
Finance Leases: |  |
Right-of-use-Assets, Net | 3.2 | 3.3
Current Portion | 0.0 | 0.0
Long-Term | 4.9 | 4.9
Total Finance Lease Liabilities | 4.9 | 4.9
PSNH |  |
Operating Leases: |  |
Right-of-use-Assets, Net | 0.0 | 0.3
Current Portion | 0.0 | 0.0
Long-Term | 0.0 | 0.3
Total Operating Lease Liabilities | 0.0 | 0.3
Finance Leases: |  |
Right-of-use-Assets, Net | 0.0 | 0.7
Current Portion | 0.0 | 0.1
Long-Term | 0.0 | 0.6
Total Finance Lease Liabilities | $ 0.0 | $ 0.7

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