SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2011

Segment Reporting Information Line Items

Schedule Of Segment Reporting Information By Segment Text Block

		For the Year Ended December 31, 2011
		Regulated Companies
		Distribution
(Millions of Dollars)		Electric		Natural Gas		Transmission		Other		Eliminations		Total
Operating Revenues		$	3,343.1	$	430.8	$	635.4	$	541.3	$	(484.9)	$	4,465.7
Depreciation and Amortization			(343.2)		(27.7)		(84.0)		(16.8)		2.5		(469.2)
Other Operating Expenses			(2,631.4)		(333.5)		(188.2)		(534.1)		484.9		(3,202.3)
Operating Income/(Loss)			368.5		69.6		363.2		(9.6)		2.5		794.2
Interest Expense			(123.8)		(21.0)		(76.7)		(33.7)		4.8		(250.4)
Interest Income			3.7		-		0.5		5.3		(5.3)		4.2
Other Income, Net			11.6		1.3		10.7		455.2		(455.3)		23.5
Income Tax (Expense)/Benefit			(67.6)		(18.2)		(95.6)		14.3		(3.9)		(171.0)
Net Income			192.4		31.7		202.1		431.5		(457.2)		400.5
Net Income Attributable
	to Noncontrolling Interests		(3.3)		-		(2.5)		-		-		(5.8)
Net Income Attributable
	to Controlling Interests	$	189.1	$	31.7	$	199.6	$	431.5	$	(457.2)	$	394.7
Total Assets (as of)		$	9,653.1	$	1,511.3	$	3,792.9	$	6,618.0	$	(5,928.2)	$	15,647.1
Cash Flows Used for
	Investments in Plant	$	540.7	$	98.2	$	388.9	$	48.9	$	-	$	1,076.7

		For the Year Ended December 31, 2010
		Regulated Companies
		Distribution
(Millions of Dollars)		Electric		Natural Gas		Transmission		Other		Eliminations		Total
Operating Revenues		$	3,802.0	$	434.3	$	625.6	$	521.6	$	(485.3)	$	4,898.2
Depreciation and Amortization			(506.7)		(23.8)		(86.7)		(15.8)		3.8		(629.2)
Other Operating Expenses			(2,919.6)		(340.0)		(192.1)		(505.4)		488.0		(3,469.1)
Operating Income			375.7		70.5		346.8		0.4		6.5		799.9
Interest Expense			(133.4)		(17.9)		(73.2)		(17.4)		4.6		(237.3)
Interest Income			0.7		-		1.8		5.3		(6.3)		1.5
Other Income, Net			24.4		0.8		14.3		436.4		(435.5)		40.4
Income Tax (Expense)/Benefit			(90.3)		(20.7)		(109.3)		11.0		(1.1)		(210.4)
Net Income			177.1		32.7		180.4		435.7		(431.8)		394.1
Net Income Attributable
	to Noncontrolling Interests		(3.6)		-		(2.6)		-		-		(6.2)
Net Income Attributable
	to Controlling Interests	$	173.5	$	32.7	$	177.8	$	435.7	$	(431.8)	$	387.9
Total Assets (as of)		$	8,910.1	$	1,447.2	$	3,434.0	$	6,283.0	$	(5,601.7)	$	14,472.6
Cash Flows Used for
	Investments in Plant	$	560.1	$	82.5	$	239.2	$	72.7	$	-	$	954.5

		For the Year Ended December 31, 2009
		Regulated Companies
		Distribution
(Millions of Dollars)		Electric		Natural Gas		Transmission		Other		Eliminations		Total
Operating Revenues		$	4,358.4	$	449.6	$	577.9	$	482.1	$	(428.6)	$	5,439.4
Depreciation and Amortization			(431.5)		(26.8)		(71.0)		(13.4)		1.9		(540.8)
Other Operating Expenses			(3,604.6)		(368.1)		(170.9)		(435.9)		432.3		(4,147.2)
Operating Income			322.3		54.7		336.0		32.8		5.6		751.4
Interest Expense			(149.1)		(22.1)		(72.5)		(36.2)		6.3		(273.6)
Interest Income			4.5		-		1.0		7.7		(7.6)		5.6
Other Income, Net			24.0		0.3		7.6		371.6		(371.4)		32.1
Income Tax (Expense)/Benefit			(60.2)		(11.9)		(105.5)		0.1		(2.4)		(179.9)
Net Income			141.5		21.0		166.6		376.0		(369.5)		335.6
Net Income Attributable
	to Noncontrolling Interests		(3.3)		-		(2.3)		-		-		(5.6)
Net Income Attributable
	to Controlling Interests	$	138.2	$	21.0	$	164.3	$	376.0	$	(369.5)	$	330.0
Cash Flows Used for
	Investments in Plant	$	521.5	$	54.8	$	286.0	$	-	$	45.8	$	908.1

The Connecticut Light And Power Company [Member]

Segment Reporting Information Line Items

Schedule Of Segment Reporting Information By Segment Text Block

		CL&P - For the Years Ended December 31,
		2011						2010						2009
(Millions of Dollars)		Distribution		Transmission		Total		Distribution		Transmission		Total		Distribution		Transmission		Total
Operating Revenues		$	2,065.3	$	483.1	$	2,548.4	$	2,500.3	$	498.8	$	2,999.1	$	2,954.6	$	469.9	$	3,424.5
Depreciation and Amortization			(158.7)		(64.2)		(222.9)		(355.5)		(67.6)		(423.1)		(330.3)		(58.4)		(388.7)
Other Operating Expenses			(1,722.7)		(139.6)		(1,862.3)		(1,942.4)		(146.0)		(2,088.4)		(2,441.7)		(129.0)		(2,570.7)
Operating Income			183.9		279.3		463.2		202.4		285.2		487.6		182.6		282.5		465.1
Interest Expense			(71.7)		(61.0)		(132.7)		(77.6)		(60.1)		(137.7)		(93.1)		(62.7)		(155.8)
Interest Income			2.4		0.4		2.8		1.9		1.5		3.4		2.7		0.8		3.5
Other Income, Net			2.5		4.4		6.9		14.6		8.6		23.2		16.2		6.1		22.3
Income Tax Expense			(21.1)		(68.9)		(90.0)		(43.6)		(88.8)		(132.4)		(31.1)		(87.7)		(118.8)
Net Income		$	96.0	$	154.2	$	250.2	$	97.7	$	146.4	$	244.1	$	77.3	$	139.0	$	216.3
Total Assets (as of)		$	6,161.0	$	2,630.4	$	8,791.4	$	5,640.0	$	2,615.2	$	8,255.2
Cash Flows Used for
	Investments in Plant	$	303.2	$	121.7	$	424.9	$	270.2	$	110.1	$	380.3	$	270.8	$	164.9	$	435.7

Public Service Company Of New Hampshire [Member]

Segment Reporting Information Line Items

Schedule Of Segment Reporting Information By Segment Text Block

		PSNH - For the Years Ended December 31,
		2011						2010						2009
(Millions of Dollars)		Distribution		Transmission		Total		Distribution		Transmission		Total		Distribution		Transmission		Total
Operating Revenues		$	923.7	$	89.3	$	1,013.0	$	951.0	$	82.4	$	1,033.4	$	1,035.8	$	73.8	$	1,109.6
Depreciation and Amortization			(143.4)		(11.5)		(154.9)		(118.4)		(10.4)		(128.8)		(70.5)		(9.3)		(79.8)
Other Operating Expenses			(644.4)		(33.6)		(678.0)		(696.0)		(32.4)		(728.4)		(865.8)		(29.4)		(895.2)
Operating Income			135.9		44.2		180.1		136.6		39.6		176.2		99.5		35.1		134.6
Interest Expense			(36.2)		(7.9)		(44.1)		(38.6)		(8.5)		(47.1)		(39.8)		(6.7)		(46.5)
Interest Income/(Loss)			0.9		0.1		1.0		(1.7)		0.2		(1.5)		2.1		0.1		2.2
Other Income, Net			11.2		2.0		13.2		11.6		1.7		13.3		6.0		1.3		7.3
Income Tax Expense			(35.6)		(14.3)		(49.9)		(38.6)		(12.2)		(50.8)		(20.2)		(11.8)		(32.0)
Net Income		$	76.2	$	24.1	$	100.3	$	69.3	$	20.8	$	90.1	$	47.6	$	18.0	$	65.6
Total Assets (as of)		$	2,551.3	$	565.2	$	3,116.5	$	2,388.4	$	490.7	$	2,879.1
Cash Flows Used for
	Investments in Plant	$	189.0	$	52.8	$	241.8	$	252.2	$	44.1	$	296.3	$	207.8	$	58.6	$	266.4

Western Massachusetts Electric Company [Member]

Segment Reporting Information Line Items

Schedule Of Segment Reporting Information By Segment Text Block

		WMECO - For the Years Ended December 31,
		2011						2010						2009
(Millions of Dollars)		Distribution		Transmission		Total		Distribution		Transmission		Total		Distribution		Transmission		Total
Operating Revenues		$	354.4	$	62.9	$	417.3	$	350.9	$	44.3	$	395.2	$	368.2	$	34.2	$	402.4
Depreciation and Amortization			(41.1)		(8.2)		(49.3)		(32.9)		(8.6)		(41.5)		(30.8)		(3.2)		(34.0)
Other Operating Expenses			(264.6)		(15.0)		(279.6)		(281.3)		(13.8)		(295.1)		(297.3)		(12.5)		(309.8)
Operating Income			48.7		39.7		88.4		36.7		21.9		58.6		40.1		18.5		58.6
Interest Expense			(15.9)		(7.7)		(23.6)		(17.1)		(4.7)		(21.8)		(16.1)		(3.2)		(19.3)
Interest Income/(Loss)			0.4		-		0.4		0.4		0.2		0.6		(0.3)		-		(0.3)
Other Income/(Loss), Net			(2.1)		3.2		1.1		(1.8)		3.8		2.0		1.8		0.3		2.1
Income Tax Expense			(10.9)		(12.3)		(23.2)		(8.1)		(8.2)		(16.3)		(8.8)		(6.1)		(14.9)
Net Income		$	20.2	$	22.9	$	43.1	$	10.1	$	13.0	$	23.1	$	16.7	$	9.5	$	26.2
Total Assets (as of)		$	942.6	$	560.3	$	1,502.9	$	884.2	$	315.4	$	1,199.6
Cash Flows Used for
	Investments in Plant	$	48.5	$	189.5	$	238.0	$	37.6	$	77.6	$	115.2	$	42.9	$	62.5	$	105.4

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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