Environmental Matters (Tablels)

9 Months Ended

Sep. 30, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Environmental Loss Contingencies By Site Text Block

	As of September 30, 2013				As of December 31, 2012
			Reserve				Reserve
	Number of Sites		(in millions)		Number of Sites		(in millions)
NU		68	$	36.5		77	$	39.4
CL&P		18		3.5		19		3.7
NSTAR Electric		12		1.2		16		1.7
PSNH		15		5.6		16		4.9
WMECO		5		0.4		6		0.6