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, 2022		348,443,855					301
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 Income						40,296			40,296
Dividends on Common Stock	(235,354)			(235,354)		(28,000)			(28,000)
Other Comprehensive Income (Loss)						73				73
Balance (in shares) at Mar. 31, 2023		348,808,082					301
Balance at Mar. 31, 2023	$ 15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	1,882,556	$ 0	1,298,134	584,422	0
Balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					301
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income						48,356			48,356
Dividends on Common Stock	$ (250,770)			(250,770)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive Income (Loss)						0
Balance (in shares) at Mar. 31, 2024	351,379,414	351,379,414					301
Balance at Mar. 31, 2024	$ 14,543,588	$ 1,806,385	$ 8,537,591	$ 4,413,593	$ (28,534)	$ 2,502,275	$ 0	$ 1,798,134	$ 704,141	$ 0