MARKETABLE SECURITIES (Tables)

6 Months Ended

Jun. 30, 2016

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Available For Sale Securities Reconciliation [Table TextBlock]

		As of June 30, 2016								As of December 31, 2015
				Pre-Tax		Pre-Tax						Pre-Tax		Pre-Tax
Eversource		Amortized		Unrealized		Unrealized				Amortized		Unrealized		Unrealized
(Millions of Dollars)		Cost		Gains		Losses		Fair Value		Cost		Gains		Losses		Fair Value
	Debt Securities	$	261.0	$	8.4	$	-	$	269.4	$	256.5	$	4.5	$	(0.6)	$	260.4
	Equity Securities		207.8		58.5		(2.3)		264.0		215.3		59.2		(3.4)		271.1

Investments Classified by Contractual Maturity Date [Table Text Block]

Eversource	Amortized
(Millions of Dollars)	Cost		Fair Value
Less than one year (1)	$	27.2	$	27.2
One to five years		61.6		62.4
Six to ten years		45.4		47.2
Greater than ten years		126.8		132.6
Total Debt Securities	$	261.0	$	269.4

Fair Value Heirarchy [Table Text Block]

Eversource
(Millions of Dollars)		As of June 30, 2016		As of December 31, 2015
Level 1:
	Mutual Funds and Equities	$	274.6	$	285.3
	Money Market Funds		21.1		26.9
Total Level 1		$	295.7	$	312.2
Level 2:
	U.S. Government Issued Debt Securities (Agency and Treasury)	$	70.8	$	46.6
	Corporate Debt Securities		39.5		43.9
	Asset-Backed Debt Securities		18.8		20.0
	Municipal Bonds		109.9		111.4
	Other Fixed Income Securities		9.3		11.6
Total Level 2		$	248.3	$	233.5
Total Marketable Securities		$	544.0	$	545.7