PROPERTY, PLANT AND ACCUMULATED DEPRECIATION (Tables)

9 Months Ended

Sep. 30, 2014

Notes To Consolidated Financial Statements [Abstract]

Schedule of Public Utility Property, Plant, and Equipment [Text Block]

		As of September 30, 2014		As of December 31, 2013
(Millions of Dollars)		NU		NU
Distribution - Electric		$	12,306.6	$	11,950.2
Distribution - Natural Gas			2,494.5		2,425.9
Transmission			6,564.2		6,412.5
Generation			1,168.6		1,152.3
Electric and Natural Gas Utility			22,533.9		21,940.9
Other (1)			541.7		508.7
Property, Plant and Equipment, Gross			23,075.6		22,449.6
Less: Accumulated Depreciation
	Electric and Natural Gas Utility		(5,687.0)		(5,387.0)
	Other		(216.3)		(196.2)
Total Accumulated Depreciation			(5,903.3)		(5,583.2)
Property, Plant and Equipment, Net			17,172.3		16,866.4
Construction Work in Progress			1,082.3		709.8
Total Property, Plant and Equipment, Net		$	18,254.6	$	17,576.2

	As of September 30, 2014								As of December 31, 2013
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric		PSNH		WMECO		CL&P		Electric		PSNH		WMECO
Distribution	$	5,104.8	$	4,812.4	$	1,654.5	$	774.8	$	4,930.7	$	4,694.7	$	1,608.2	$	756.6
Transmission		3,125.2		1,824.6		715.8		851.8		3,071.9		1,772.3		695.7		826.4
Generation		-		-		1,134.7		33.9		-		-		1,131.2		21.1
Property, Plant and Equipment, Gross		8,230.0		6,637.0		3,505.0		1,660.5		8,002.6		6,467.0		3,435.1		1,604.1
Less: Accumulated Depreciation		(1,908.2)		(1,726.7)		(1,069.4)		(291.8)		(1,804.1)		(1,631.3)		(1,021.8)		(271.5)
Property, Plant and Equipment, Net		6,321.8		4,910.3		2,435.6		1,368.7		6,198.5		4,835.7		2,413.3		1,332.6
Construction Work in Progress		379.0		301.4		125.0		63.7		252.8		208.2		54.3		48.5
Total Property, Plant and Equipment, Net	$	6,700.8	$	5,211.7	$	2,560.6	$	1,432.4	$	6,451.3	$	5,043.9	$	2,467.6	$	1,381.1