PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Revenues	$ 11,910,705	$ 12,289,336	$ 9,863,085
Operating Expenses:
Purchased Power and Transmission	5,168,241	5,014,074	3,372,344
Operations and Maintenance	1,895,703	1,865,328	1,739,685
Depreciation	1,305,840	1,194,246	1,103,008
Energy Efficiency Programs	691,344	658,051	592,775
Taxes Other Than Income Taxes	940,359	910,591	829,987
Total Operating Expenses	9,511,370	10,091,182	7,869,764
Operating Income	2,399,335	2,198,154	1,993,321
Interest Expense	855,441	678,274	582,334
Other Income, Net	348,069	346,088	161,282
(Loss)/Income Before Income Tax Expense	(275,037)	1,865,968	1,572,269
Income Tax Expense	159,684	453,574	344,223
Net (Loss)/Income	(434,700)	1,412,400	1,228,000
PSNH
Operating Revenues	1,447,873	1,474,799	1,177,248
Operating Expenses:
Purchased Power and Transmission	604,983	665,478	370,271
Operations and Maintenance	284,442	255,991	237,659
Depreciation	140,417	127,962	120,065
Amortization of Regulatory (Liabilities)/Assets, Net	(16,343)	42,867	86,832
Energy Efficiency Programs	39,618	37,434	38,752
Taxes Other Than Income Taxes	93,894	95,301	91,465
Total Operating Expenses	1,147,011	1,225,033	945,044
Operating Income	300,862	249,766	232,204
Interest Expense	72,786	59,548	56,998
Other Income, Net	26,597	32,666	14,565
(Loss)/Income Before Income Tax Expense	254,673	222,884	189,771
Income Tax Expense	59,014	51,314	39,433
Net (Loss)/Income	$ 195,659	$ 171,570	$ 150,338