MARKETABLE SECURITIES (Tables)

3 Months Ended

Jun. 30, 2015

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Available For Sale Securities Reconciliation [Table TextBlock]

		As of June 30, 2015								As of December 31, 2014
				Pre-Tax		Pre-Tax						Pre-Tax		Pre-Tax
		Amortized		Unrealized		Unrealized				Amortized		Unrealized		Unrealized
(Millions of Dollars)		Cost		Gains		Losses		Fair Value		Cost		Gains		Losses		Fair Value
Eversource
	Debt Securities (1)	$	315.3	$	4.9	$	(0.6)	$	319.6	$	313.0	$	7.5	$	(0.3)	$	320.2
	Equity Securities (1)		216.5		72.9		(1.2)		288.2		160.6		73.3		-		233.9
WMECO
	Debt Securities (2)		58.3		-		-		58.3		58.2		-		(0.1)		58.1

Investments Classified by Contractual Maturity Date [Table Text Block]

	Eversource				WMECO
	Amortized				Amortized
(Millions of Dollars)	Cost		Fair Value		Cost		Fair Value
Less than one year (1)	$	66.1	$	66.1	$	38.4	$	38.4
One to five years		70.4		70.8		16.2		16.2
Six to ten years		60.1		61.2		0.6		0.6
Greater than ten years		118.7		121.5		3.1		3.1
Total Debt Securities	$	315.3	$	319.6	$	58.3	$	58.3

Fair Value Heirarchy [Table Text Block]

		Eversource				WMECO
(Millions of Dollars)		As of June 30, 2015		As of December 31, 2014		As of June 30, 2015		As of December 31, 2014
Level 1:
	Mutual Funds and Equities	$	303.1	$	319.0	$	-	$	-
	Money Market Funds		26.4		24.9		2.1		4.3
Total Level 1		$	329.5	$	343.9	$	2.1	$	4.3
Level 2:
	U.S. Government Issued Debt Securities (Agency and Treasury)	$	38.6	$	51.3	$	-	$	-
	Corporate Debt Securities		60.1		49.1		13.6		14.7
	Asset-Backed Debt Securities		32.0		54.1		10.0		14.5
	Municipal Bonds		126.9		116.3		10.8		13.0
	Other Fixed Income Securities		35.6		24.5		21.8		11.6
Total Level 2		$	293.2	$	295.3	$	56.2	$	53.8
Total Marketable Securities		$	622.7	$	639.2	$	58.3	$	58.1