THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net (Loss)/Income	$ (434,700)	$ 1,412,400	$ 1,228,000
Other Comprehensive Income, Net of Tax:
Other Comprehensive Income/(Loss), Net of Tax	5,700	2,900
Comprehensive (Loss)/Income	(436,556)	1,407,729	1,254,663
The Connecticut Light and Power Company
Net (Loss)/Income	518,733	532,920	401,725
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	(26)	(26)	(26)
Changes in Unrealized Gains/(Losses) on Marketable Securities	42	(56)	(25)
Other Comprehensive Income/(Loss), Net of Tax	16	(82)	(51)
Comprehensive (Loss)/Income	$ 518,749	$ 532,838	$ 401,674