Environmental Matters (Tablels)

6 Months Ended

Jun. 30, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Environmental Loss Contingencies By Site Text Block

	As of June 30, 2013				As of December 31, 2012
			Reserve				Reserve
	Number of Sites		(in millions)		Number of Sites		(in millions)
NU		71	$	38.4		77	$	39.4
CL&P		19		3.5		19		3.7
NSTAR Electric		13		1.8		16		1.7
PSNH		16		5.5		16		4.9
WMECO		5		0.5		6		0.6