Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2014

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Environmental Loss Contingencies By Site Text Block

(Millions of Dollars)	NU		CL&P		NSTAR Electric		PSNH		WMECO
Balance as of January 1, 2013	$	39.4	$	3.7	$	1.7	$	4.9	$	0.6
Additions		3.5		0.2		0.2		1.0		-
Payments/Reductions		(7.5)		(0.5)		(0.7)		(0.5)		(0.2)
Balance as of December 31, 2013		35.4		3.4		1.2		5.4		0.4
Additions		12.7		1.0		-		0.1		0.2
Payments/Reductions		(4.8)		(0.6)		(0.1)		(0.3)		(0.1)
Balance as of December 31, 2014	$	43.3	$	3.8	$	1.1	$	5.2	$	0.5

	As of December 31, 2014				As of December 31, 2013
			Reserve				Reserve
	Number of Sites		(in millions)		Number of Sites		(in millions)
NU		65	$	43.3		68	$	35.4
CL&P		16		3.8		18		3.4
NSTAR Electric		13		1.1		12		1.2
PSNH		13		5.2		15		5.4
WMECO		4		0.5		5		0.4