ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows:

	For the Three Months Ended March 31, 2023								For the Three Months Ended March 31, 2022
Eversource (Millions of Dollars)	Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total		Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total
Balance as of Beginning of Period	$	(0.4)	$	(1.2)	$	(37.8)	$	(39.4)	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)
OCI Before Reclassifications	—		—		—		—		—		(0.8)		—		(0.8)
Amounts Reclassified from AOCI	—		1.2		2.0		3.2		—		—		1.5		1.5
Net OCI	—		1.2		2.0		3.2		—		(0.8)		1.5		0.7
Balance as of End of Period	$	(0.4)	$	—	$	(35.8)	$	(36.2)	$	(0.4)	$	(0.4)	$	(40.8)	$	(41.6)

Defined benefit plan OCI amounts reclassified from AOCI relate to the unamortized actuarial gains and losses and prior service costs on the defined benefit plans that are amortized from AOCI into Other Income, Net over the average future employee service period.