Environmental Matters (Tables)

3 Months Ended

Sep. 30, 2015

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Environmental Loss Contingencies By Site Text Block

	As of September 30, 2015				As of December 31, 2014
			Reserve				Reserve
	Number of Sites		(in millions)		Number of Sites		(in millions)
Eversource		64	$	46.9		65	$	43.3
CL&P		14		4.8		16		3.8
NSTAR Electric		14		2.2		13		1.1
PSNH		12		3.4		13		5.2
WMECO		4		0.6		4		0.5