THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income	$ 1,228,046	$ 1,212,686	$ 916,572
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	972	1,596	1,393
Changes in Unrealized (Losses)/Gains on Marketable Securities	(671)	342	1,166
Other Comprehensive Income/(Loss), Net of Tax	34,136	(11,352)	(5,059)
Comprehensive Income Attributable to Common Shareholders	1,254,663	1,193,815	903,994
The Connecticut Light and Power Company
Net Income	401,725	457,934	410,852
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	(26)	(26)	(26)
Changes in Unrealized (Losses)/Gains on Marketable Securities	(25)	12	41
Other Comprehensive Income/(Loss), Net of Tax	(51)	(14)	15
Comprehensive Income Attributable to Common Shareholders	$ 401,674	$ 457,920	$ 410,867