ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables)

9 Months Ended

Sep. 30, 2021

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


	For the Nine Months Ended September 30, 2021								For the Nine Months Ended September 30, 2020
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 on Marketable Securities		Defined Benefit Plans		Total
Balance as of Beginning of Period	$	(1.4)	$	1.1	$	(76.1)	$	(76.4)	$	(3.0)	$	0.7	$	(62.8)	$	(65.1)

OCI Before Reclassifications	—		(0.6)		(2.4)		(3.0)		—		0.3		(1.6)		(1.3)
Amounts Reclassified from AOCI	1.0		—		6.5		7.5		1.2		—		4.8		6.0
Net OCI	1.0		(0.6)		4.1		4.5		1.2		0.3		3.2		4.7
Balance as of End of Period	$	(0.4)	$	0.5	$	(72.0)	$	(71.9)	$	(1.8)	$	1.0	$	(59.6)	$	(60.4)