PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	PSNH	PSNH Common Stock	PSNH Capital Surplus, Paid In	PSNH Retained Earnings	PSNH Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2020		342,954,023					301
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 Income	368,023			368,023		44,676			44,676
Dividends on Common Stock	(206,913)			(206,913)		(25,200)			(25,200)
Other Comprehensive (Loss)/Income, Net of Tax	1,188				1,188	255				255
Balance (in shares) at Mar. 31, 2021		343,434,298					301
Balance at Mar. 31, 2021	$ 14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	1,562,270	$ 0	928,134	634,494	(358)
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					301
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 Income	445,326			445,326		45,586			45,586
Dividends on Common Stock	(219,768)			(219,768)		(26,000)			(26,000)
Other Comprehensive (Loss)/Income, Net of Tax	$ 704				704	(48)				(48)
Balance (in shares) at Mar. 31, 2022	344,850,272	344,850,272					301
Balance at Mar. 31, 2022	$ 14,836,690	$ 1,789,092	$ 8,102,618	$ 5,229,069	$ (41,571)	$ 1,612,251	$ 0	$ 1,088,134	$ 524,142	$ (25)