LEASES (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Components of Lease Cost

The components of lease cost, prior to amounts capitalized, are as follows:

	For the Years Ended December 31,
	2020								2019
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Financing Lease Cost:
Amortization of Right-of-use-Assets	$	2.6	$	0.7	$	0.2	$	0.1	$	1.7	$	0.7	$	0.2	$	0.1
Interest on Lease Liabilities	1.4		0.3		0.6		—		1.2		0.6		0.6		—
Total Finance Lease Cost	4.0		1.0		0.8		0.1		2.9		1.3		0.8		0.1
Operating Lease Cost	11.1		0.6		2.1		0.1		11.7		0.5		3.4		0.1
Variable Lease Cost	57.8		12.2		—		45.6		60.5		13.3		—		47.2
Total Lease Cost	$	72.9	$	13.8	$	2.9	$	45.8	$	75.1	$	15.1	$	4.2	$	47.4

Schedule of Rent Expense

Operating lease rental payments charged to expense in 2018 (which exclude CL&P's and PSNH's energy purchase contracts) were as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2018	$	10.8	$	10.9	$	11.8	$	2.5

Supplemental Balance Sheet Information Related to Leases

Supplemental balance sheet information related to leases is as follows:

		As of December 31, 2020
(Millions of Dollars)	Balance Sheet Classification	Eversource		CL&P		NSTAR Electric		PSNH
Operating Leases:
Operating Lease Right-of-use-Assets, Net	Other Long-Term Assets	$	55.2	$	0.3	$	23.6	$	0.3
Operating Lease Liabilities
Operating Lease Liabilities - Current Portion	Other Current Liabilities	$	9.5	$	0.2	$	0.7	$	—
Operating Lease Liabilities - Long-Term	Other Long-Term Liabilities	45.7		0.1		22.9		0.3
Total Operating Lease Liabilities		$	55.2	$	0.3	$	23.6	$	0.3
Finance Leases:
Finance Lease Right-of-use-Assets, Net	Property, Plant and Equipment, Net	$	60.5	$	0.7	$	3.5	$	0.8
Finance Lease Liabilities
Finance Lease Liabilities - Current Portion	Other Current Liabilities	$	5.0	$	1.4	$	—	$	0.1
Finance Lease Liabilities - Long-Term	Other Long-Term Liabilities	57.6		—		4.8		0.7
Total Finance Lease Liabilities		$	62.6	$	1.4	$	4.8	$	0.8

Other Information Related to Leases

Other information related to leases is as follows (in millions of dollars, unless otherwise noted):

	As of December 31,
	2020								2019
	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Weighted-Average Remaining Lease Term (Years):
Operating Leases	10		3		19		8		12		2		20		9
Finance Leases	17		1		21		8		12		2		22		9
Weighted-Average Discount Rate (Percentage):
Operating Leases	4.0	%	2.4	%	4.1	%	3.7	%	3.9	%	2.5	%	4.1	%	3.7	%
Finance Leases	2.9	%	10.5	%	2.9	%	3.5	%	4.0	%	10.5	%	2.9	%	3.5	%

	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2020
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	10.9	$	0.6	$	1.8	$	0.1
Operating Cash Flows from Finance Leases	1.7		0.3		0.6		—
Financing Cash Flows from Finance Leases	2.8		1.6		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.6		0.1		0.2		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	0.7		—		0.3		—

	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2019
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	11.4	$	0.4	$	1.6	$	0.1
Operating Cash Flows from Finance Leases	1.2		0.6		0.6		—
Financing Cash Flows from Finance Leases	2.6		1.4		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	2.9		1.0		0.1		0.2
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	2.0		—		—		—

Future Minimum Lease Payments under Long-Term Finance Leases

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2020 are as follows:

	Operating Leases								Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Year Ending December 31,
2021	$	11.4	$	0.2	$	1.6	$	0.1	$	7.2	$	1.5	$	0.6	$	0.1
2022	9.0		0.1		1.6		0.1		5.7		—		0.6		0.1
2023	6.4		—		1.6		0.1		4.9		—		0.6		0.1
2024	4.5		—		1.7		—		4.8		—		0.7		0.1
2025	3.4		—		1.7		—		4.7		—		0.7		0.1
Thereafter	36.2		—		27.0		0.1		60.7		—		13.0		0.4
Future lease payments	70.9		0.3		35.2		0.4		88.0		1.5		16.2		0.9
Less amount representing interest	15.7		—		11.6		0.1		25.4		0.1		11.4		0.1
Present value of future minimum lease payments	$	55.2	$	0.3	$	23.6	$	0.3	$	62.6	$	1.4	$	4.8	$	0.8

Future Minimum Lease Payments under Long-Term Operating Leases

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2020 are as follows:

	Operating Leases								Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Year Ending December 31,
2021	$	11.4	$	0.2	$	1.6	$	0.1	$	7.2	$	1.5	$	0.6	$	0.1
2022	9.0		0.1		1.6		0.1		5.7		—		0.6		0.1
2023	6.4		—		1.6		0.1		4.9		—		0.6		0.1
2024	4.5		—		1.7		—		4.8		—		0.7		0.1
2025	3.4		—		1.7		—		4.7		—		0.7		0.1
Thereafter	36.2		—		27.0		0.1		60.7		—		13.0		0.4
Future lease payments	70.9		0.3		35.2		0.4		88.0		1.5		16.2		0.9
Less amount representing interest	15.7		—		11.6		0.1		25.4		0.1		11.4		0.1
Present value of future minimum lease payments	$	55.2	$	0.3	$	23.6	$	0.3	$	62.6	$	1.4	$	4.8	$	0.8