PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	PSNH	PSNH Common Stock	PSNH Capital Surplus, Paid In	PSNH Retained Earnings	PSNH Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		342,954,023					301
Beginning balance at Dec. 31, 2020	$ 14,063,566	$ 1,789,092	$ 8,015,663	$ 4,613,201	$ (76,411)	$ 1,542,539	$ 0	$ 928,134	$ 615,018	$ (613)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income	1,228,000					150,338			150,338
Dividends on Common Stock	(828,337)			(828,337)		(260,800)			(260,800)
Capital Contributions from Eversource Parent						160,000		160,000
Other Comprehensive (Loss)/Income, Net of Tax						636				636
Ending balance (in shares) at Dec. 31, 2021		344,403,196					301
Ending balance at Dec. 31, 2021	14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	1,592,713	$ 0	1,088,134	504,556	23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income	1,412,400					171,570			171,570
Dividends on Common Stock	(883,113)			(883,113)		(104,000)			(104,000)
Capital Contributions from Eversource Parent	210,000							210,000
Other Comprehensive (Loss)/Income, Net of Tax	$ 2,900					(96)				(96)
Ending balance (in shares) at Dec. 31, 2022	348,443,855	348,443,855					301
Ending balance at Dec. 31, 2022	$ 15,473,158	$ 1,799,920	8,401,731	5,527,153	(39,421)	1,870,187	$ 0	1,298,134	572,126	(73)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income	(434,700)					195,659			195,659
Dividends on Common Stock	(942,398)			(942,398)		(112,000)			(112,000)
Capital Contributions from Eversource Parent						400,000		400,000
Other Comprehensive (Loss)/Income, Net of Tax	$ 5,700					73				73
Ending balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					301
Ending balance at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	$ 8,460,876	$ 4,142,515	$ (33,737)	$ 2,353,919	$ 0	$ 1,698,134	$ 655,785	$ 0