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Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)

12 Months Ended

Dec. 31, 2012

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Net Benefit Costs [Table Text Block]

		Pension and SERP
		For the Year Ended December 31, 2012
						NSTAR
(Millions of Dollars)		NU		CL&P		Electric⁽¹⁾		PSNH		WMECO
Service Cost		$	84.3	$	21.8	$	30.3	$	11.8	$	4.1
Interest Cost			198.3		51.2		58.9		24.4		10.5
Expected Return on Plan Assets			(220.9)		(70.6)		(65.6)		(28.2)		(16.4)
Actuarial Loss			172.4		49.6		63.1		16.2		10.7
Prior Service Cost/(Credit)			7.9		3.6		(0.6)		1.5		0.8
Total Net Periodic Benefit Expense		$	242.0	$	55.6	$	86.1	$	25.7	$	9.7
Curtailments and Settlements		$	2.2	$	-	$	-	$	-	$	-
Related Intercompany Allocations			N/A	$	42.8	$	(12.3)	$	10.1	$	8.1
Capitalized Pension Expense		$	70.6	$	26.8	$	30.7	$	7.9	$	5.1

		Pension and SERP
		For the Year Ended December 31, 2011
						NSTAR
(Millions of Dollars)		NU		CL&P		Electric⁽¹⁾		PSNH		WMECO
Service Cost		$	55.4	$	19.5	$	26.0	$	10.6	$	3.9
Interest Cost			153.3		51.9		61.0		24.4		10.7
Expected Return on Plan Assets			(170.8)		(76.6)		(71.4)		(19.8)		(17.7)
Actuarial Loss			84.2		33.4		48.6		10.7		7.1
Prior Service Cost/(Credit)			9.7		4.2		(0.7)		1.8		0.9
Total Net Periodic Benefit Expense		$	131.8	$	32.4	$	63.5	$	27.7	$	4.9
Related Intercompany Allocations			N/A	$	34.1	$	(10.2)	$	7.6	$	6.2
Capitalized Pension Expense		$	29.7	$	16.6	$	19.8	$	7.6	$	2.7

		Pension and SERP
		For the Year Ended December 31, 2010
						NSTAR
(Millions of Dollars)		NU		CL&P		Electric⁽¹⁾		PSNH		WMECO
Service Cost		$	51.0	$	17.6	$	23.6	$	10.0	$	3.5
Interest Cost			152.6		52.2		61.8		24.1		10.7
Expected Return on Plan Assets			(182.6)		(85.8)		(62.8)		(14.7)		(19.5)
Actuarial Loss			53.5		20.7		50.4		7.2		4.3
Prior Service Cost/(Credit)			9.9		4.2		(0.7)		1.8		0.9
Total Net Periodic Benefit Expense/(Income)		$	84.4	$	8.9	$	72.3	$	28.4	$	(0.1)
Related Intercompany Allocations			N/A	$	25.2	$	(11.6)	$	6.0	$	4.5
Capitalized Pension Expense		$	16.9	$	3.8	$	24.5	$	6.9	$	-

⁽¹⁾	NSTAR Electric amounts are included in NU consolidated from the date of the merger, April 10, 2012, through December 31, 2012. NSTAR Electric amounts are not included in NU consolidated for the years ended December 31, 2011 and 2010. NSTAR Electric's allocated expense associated with the NSTAR SERP was $3.6 million, $4.4 million and $3.9 million for the years ended December 31, 2012, 2011 and 2010, respectively, and are not included in the NSTAR Electric amounts in the tables above.

The following actuarial assumptions were used to calculate Pension and SERP expense amounts:

			PBOP
		For the Years Ended December 31,
		2012								2011								2010
(Millions of Dollars)		NU ⁽¹⁾		CL&P		PSNH		WMECO		NU		CL&P		PSNH		WMECO		NU		CL&P		PSNH		WMECO
Service Cost		$	15.7	$	3.0	$	2.0	$	0.6	$	9.2	$	2.9	$	1.9	$	0.6	$	8.5	$	2.7	$	1.8	$	0.6
Interest Cost			49.0		9.2		4.6		2.0		25.7		10.0		4.8		2.2		26.8		10.5		5.0		2.3
Expected Return
	on Plan Assets		(39.2)		(9.1)		(4.6)		(2.1)		(21.6)		(8.7)		(4.3)		(2.0)		(21.7)		(8.7)		(4.3)		(2.1)
Actuarial Loss			36.0		7.5		3.6		1.2		19.0		7.2		3.2		1.1		16.7		6.3		2.7		0.9
Prior Service
	Cost/(Credit)		(1.4)		-		-		-		(0.3)		-		-		1.3		(0.3)		-		-		-
Net Transition
	Obligation Cost⁽²⁾		12.2		6.1		2.5		1.3		11.6		6.2		2.5		-		11.6		6.1		2.5		1.3
Total Net Periodic Benefit Expense		$	72.3	$	16.7	$	8.1	$	3.0	$	43.6	$	17.6	$	8.1	$	3.2	$	41.6	$	16.9	$	7.7	$	3.0
Related Intercompany Allocations			N/A	$	7.9	$	2.0	$	1.5		N/A	$	8.2	$	2.0	$	1.5		N/A	$	7.9	$	2.0	$	1.4

⁽¹⁾	The NU consolidated results include NSTAR PBOP Plan expense from the date of the merger, April 10, 2012, through December 31, 2012.
⁽²⁾	The NUSCO PBOP Plans and NSTAR PBOP Plan transition obligation costs will be fully amortized in 2013.

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The accumulated benefit obligation for the Pension and SERP Plans is as follows:

		Pension and SERP
		As of December 31,
(Millions of Dollars)		2012		2011
NU		$	4,622.1	$	2,810.6
CL&P			1,061.8		938.4
NSTAR Electric ⁽¹⁾			1,353.1		1,271.3
PSNH			515.9		444.8
WMECO			221.3		195.5

⁽¹⁾	NSTAR Electric amounts are not included in NU consolidated as of December 31, 2011 and do not include the accumulated benefit obligation for the SERP Plan.

The following actuarial assumptions were used in calculating the Pension and SERP Plans' year end funded status:

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

The following is a summary of the changes in plan assets and benefit obligations recognized in Regulatory Assets and OCI as well as amounts in Regulatory Assets and OCI reclassified as net periodic benefit expense during the years presented:

	Amounts Reclassified To/From
	Regulatory Assets				OCI
(Millions of Dollars)	For the Years Ended December 31,
NU Pension and SERP Plans⁽¹⁾	2012		2011		2012		2011
Actuarial Losses Arising During the Year	$	245.7	$	334.8	$	19.1	$	23.0
Actuarial Losses Reclassified as Net Periodic Benefit Expense		(164.6)		(79.4)		(7.8)		(4.8)
Prior Service Cost Reclassified as Net Periodic Benefit Expense		(7.7)		(9.4)		(0.2)		(0.3)

The following is a summary of the remaining Regulatory Assets and Accumulated Other Comprehensive Loss amounts that have not been recognized as components of net periodic benefit expense as of December 31, 2012 and 2011, and the amounts that are expected to be recognized as components in 2013:

		Regulatory Assets as of				Expected		AOCI as of			Expected
(Millions of Dollars)	December 31,					2013	December 31,				2013
NU Pension and SERP Plans⁽¹⁾	2012		2011		Expense		2012		2011		Expense
Actuarial Loss	$	1,973.8	$	1,126.1	$	200.8	$	81.5	$	70.2	$	9.3
Prior Service Cost		21.2		29.3		3.9		1.2		1.4		0.2

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

The following is a summary of the changes in plan assets and benefit obligations recognized in Regulatory Assets and OCI as well as amounts in Regulatory Assets and OCI reclassified as net periodic benefit (expense)/income during the years presented:

		Amounts Reclassified To/From
	Regulatory Assets				OCI
(Millions of Dollars)	For the Years Ended December 31,
NU PBOP Plans ⁽¹⁾	2012		2011		2012		2011
Actuarial (Gains)/Losses Arising During the Year	$	(108.6)	$	50.2	$	(1.8)	$	4.0
Actuarial Losses Reclassified as Net Periodic Benefit Expense		(34.9)		(18.1)		(1.1)		(0.9)
Prior Service Credit Reclassified as Net Periodic Benefit Income		1.4		0.3		-		-
Transition Obligation Reclassified as Net Periodic Benefit Expense		(11.9)		(11.3)		(0.2)		(0.2)

The following is a summary of the remaining Regulatory Assets and Accumulated Other Comprehensive Loss amounts that have not been recognized as components of net periodic benefit expense as of December 31, 2012 and 2011, and the amounts that are expected to be recognized as components in 2013:

		Regulatory Assets as of			Expected			AOCI as of			Expected
(Millions of Dollars)	December 31,				2013			December 31,			2013
NU PBOP Plans ⁽¹⁾	2012		2011		Expense		2012		2011		Expense
Actuarial Loss	$	376.1	$	196.3	$	31.4	$	9.2	$	12.1	$	1.0
Prior Service Credit		(6.7)		(2.4)		(2.1)		-		-		-
Transition Obligation		-		11.4		-		-		0.2		-

Schedule of Assumptions Used [Table Text Block]

	Pension and SERP
	As of December 31,
	2012		2011
NUSCO Pension and SERP Plans
Discount Rate	4.24	%	5.03	%
Compensation/Progression Rate	3.50	%	3.50	%

NSTAR Pension and SERP Plans
Discount Rate	4.13	%	4.52	%
Compensation/Progression Rate	4.00	%	4.00	%

	Pension and SERP
	For the Years Ended December 31,
NUSCO Pension and SERP Plans	2012		2011		2010
Discount Rate	5.03	%	5.57	%	5.98	%
Expected Long-Term Rate of Return	8.25	%	8.25	%	8.75	%
Compensation/Progression Rate	3.50	%	3.50	%	4.00	%

NSTAR Pension and SERP Plans
Discount Rate	4.52	%	5.30	%	5.85	%
Expected Long-Term Rate of Return	7.30	%	8.00	%	8.00	%
Compensation/Progression Rate	4.00	%	4.00	%	4.00	%

The following actuarial assumptions were used in calculating the PBOP Plans' year end funded status:

	PBOP
	As of December 31,
	2012		2011
NUSCO PBOP Plans
Discount Rate	4.04	%	4.84	%
Health Care Cost Trend Rate	7.00	%	7.00	%

NSTAR PBOP Plan
Discount Rate	4.35	%	N/A
Health Care Cost Trend Rate	7.10	%	N/A

The following actuarial assumptions were used to calculate PBOP expense amounts:

	PBOP
	For the Years Ended December 31,
	2012		2011		2010
NUSCO PBOP Plans
Discount Rate	4.84	%	5.28	%	5.73	%
Expected Long-Term Rate of Return	8.25	%	8.25	%	8.75	%

NSTAR PBOP Plan
Discount Rate	4.58	%	N/A		N/A
Expected Long-Term Rate of Return	7.30	%	N/A		N/A

The NU consolidated amounts include the NSTAR PBOP Plan from the date of the merger, April 10, 2012, through December 31, 2012.

For the NUSCO PBOP Plans, the health care cost trend assumption is 7 percent, subsequently decreasing 50 basis points per year to an ultimate rate of 5 percent in 2017. For the NSTAR PBOP Plan, the health care cost trend assumption is 7.10 percent, subsequently decreasing to an ultimate rate of 4.50 percent in 2024.

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. The effect of changing the assumed health care cost trend rate by one percentage point for the year ended December 31, 2012 would have the following effects:

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

(Millions of Dollars)	One Percentage		One Percentage
NU PBOP Plans	Point Increase		Point Decrease
Effect on Postretirement Benefit Obligation	$	126.5	$	(101.7)
Effect on Total Service and Interest Cost Components		8.9		(6.9)

Schedule of Expected Benefit Payments [Table Text Block]

Estimated Future Benefit Payments: The following benefit payments, which reflect expected future service, are expected to be paid by the Pension, SERP and PBOP Plans:

(Millions of Dollars)	Pension
NU Consolidated	and SERP		PBOP
2013	$	238.0	$	63.5
2014		257.3		65.0
2015		252.4		66.8
2016		261.2		68.2
2017		270.6		69.6
2018-2022		1,510.2		366.3

NSTAR Pension Plan
2013	$	77.7		N/A
2014		79.6		N/A
2015		82.6		N/A
2016		83.2		N/A
2017		85.1		N/A
2018-2022		462.2		N/A

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	Pension and SERP
NU	As of December 31,
(Millions of Dollars)	2012		2011
Change in Benefit Obligation
Benefit Obligation as of Beginning of Year	$	(3,098.9)	$	(2,820.9)
Liabilities Assumed from Merger with NSTAR		(1,409.7)		-
Service Cost		(84.3)		(55.4)
Interest Cost		(198.3)		(153.3)
Actuarial Loss		(429.7)		(206.1)
Benefits Paid - Excluding Lump Sum Payments		187.7		134.4
Benefits Paid - SERP		4.2		2.4
SERP curtailment		6.2		-
Benefit Obligation as of End of Year	$	(5,022.8)	$	(3,098.9)
Change in Pension Plan Assets
Fair Value of Plan Assets as of Beginning of Year	$	2,005.9	$	1,977.6
Assets Assumed from Merger with NSTAR		984.7		-
Employer Contributions		222.4		143.6
Actual Return on Plan Assets		386.0		19.1
Benefits Paid - Excluding Lump Sum Payments		(187.7)		(134.4)
Fair Value of Plan Assets as of End of Year	$	3,411.3	$	2,005.9
Funded Status as of December 31^st	$	(1,611.5)	$	(1,093.0)

	Pension and SERP
	As of December 31, 2012								As of December 31, 2011
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric ⁽¹⁾		PSNH		WMECO		CL&P		Electric ^(1),(2)		PSNH		WMECO
Change in Benefit Obligation
Benefit Obligation as of Beginning of Year	$	(1,043.8)	$	(1,346.2)	$	(497.9)	$	(215.8)	$	(964.3)	$	(1,184.6)	$	(448.7)	$	(196.6)
Service Cost		(21.8)		(30.3)		(11.8)		(4.1)		(19.5)		(26.0)		(10.6)		(3.9)
Interest Cost		(51.2)		(58.9)		(24.4)		(10.5)		(51.9)		(61.0)		(24.4)		(10.7)
Actuarial Loss		(117.4)		(63.6)		(61.3)		(24.0)		(64.0)		(138.0)		(33.2)		(15.4)
Benefits Paid - Excluding Lump Sum Payments		55.9		69.0		19.7		11.3		55.6		59.6		18.9		10.8
Benefits Paid - SERP		0.3		-		-		-		0.3		-		0.1		-
Curtailment and Settlement Payments		-		-		(0.3)		-		-		3.8		-		-
Benefit Obligation as of End of Year	$	(1,178.0)	$	(1,430.0)	$	(576.0)	$	(243.1)	$	(1,043.8)	$	(1,346.2)	$	(497.9)	$	(215.8)
Change in Pension Plan Assets
Fair Value of Plan Assets as of Beginning of Year	$	869.6	$	988.5	$	279.7	$	202.0	$	918.4	$	930.6	$	185.4	$	209.8
Employer Contributions		-		25.0		87.7		-		-		125.0		112.6		-
Actual Return/(Loss) on Plan Assets		123.9		124.6		38.9		27.8		6.8		(3.7)		0.6		3.0
Benefits Paid - Excluding Lump Sum Payments		(55.9)		(69.0)		(19.7)		(11.3)		(55.6)		(59.6)		(18.9)		(10.8)
Benefits Paid - Settlement Payments		-		-		-		-		-		(3.8)		-		-
Fair Value of Plan Assets as of End of Year	$	937.6	$	1,069.1	$	386.6	$	218.5	$	869.6	$	988.5	$	279.7	$	202.0
Funded Status as of December 31^st	$	(240.4)	$	(360.9)	$	(189.4)	$	(24.6)	$	(174.2)	$	(357.7)	$	(218.2)	$	(13.8)

Pension and SERP benefits funded status includes the current portion of the SERP liability, which is included in Other Current Liabilities on the accompanying consolidated balance sheets.

Although the Company maintains a trust to support the SERP with marketable securities held in the NU supplemental benefit trust, the plan itself does not contain any assets. For information regarding the investments in the NU supplemental benefit trust that are used to informally support the SERP liability, see Note 6, "Marketable Securities," to the consolidated financial statements.

⁽¹⁾ NSTAR Electric amounts do not include benefit obligations of the NSTAR SERP Plan.
⁽²⁾ NSTAR Electric amounts are not included in NU consolidated as of December 31, 2011.

		PBOP
		As of December 31,
				2012						2011
(Millions of Dollars)		NU ⁽¹⁾		CL&P		PSNH		WMECO		NU		CL&P		PSNH		WMECO
Change in Benefit Obligation
Benefit Obligation as of Beginning of Year		$	(520.9)	$	(198.9)	$	(99.2)	$	(42.9)	$	(489.9)	$	(190.2)	$	(89.9)	$	(41.7)
Liabilities Assumed from Merger with NSTAR			(770.6)		-		-		-		-		-		-		-
Service Cost			(15.7)		(3.0)		(2.0)		(0.6)		(9.2)		(2.9)		(1.9)		(0.6)
Interest Cost			(49.0)		(9.2)		(4.6)		(2.0)		(25.7)		(10.0)		(4.8)		(2.2)
Actuarial Gain/(Loss)			70.9		1.2		0.3		0.1		(30.1)		(8.5)		(8.4)		(1.0)
Federal Subsidy on Benefits Paid			(6.2)		(1.7)		(0.6)		(0.3)		(4.1)		(1.8)		(0.7)		(0.4)
Benefits Paid			58.2		14.8		5.9		3.2		38.1		14.5		6.5		3.0
Benefit Obligation as of End of Year		$	(1,233.3)	$	(196.8)	$	(100.2)	$	(42.5)	$	(520.9)	$	(198.9)	$	(99.2)	$	(42.9)
Change in Plan Assets
Fair Value of Plan Assets as of Beginning of Year		$	285.4	$	112.2	$	58.7	$	27.1	$	278.5	$	108.6	$	56.9	$	26.7
Assets Assumed from Merger with NSTAR			330.4		-		-		-		-		-		-		-
Actual Return on Plan Assets			78.8		15.0		7.5		3.5		(2.5)		(1.2)		(0.4)		(0.1)
Employer Contributions			72.7		19.8		9.2		3.6		47.5		19.3		8.7		3.5
Benefits Paid			(58.2)		(14.8)		(5.9)		(3.2)		(38.1)		(14.5)		(6.5)		(3.0)
Fair Value of Plan Assets as of End of Year		$	709.1	$	132.2	$	69.5	$	31.0	$	285.4	$	112.2	$	58.7	$	27.1
Funded Status as of December 31^st		$	(524.2)	$	(64.6)	$	(30.7)	$	(11.5)	$	(235.5)	$	(86.7)	$	(40.5)	$	(15.8)

⁽¹⁾	The NU consolidated results include NSTAR PBOP Plan activity from the date of the merger, April 10, 2012, through December 31, 2012.

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

		NU Consolidated Pension Plans
		United								Real Estate
		States				Private		Fixed		and Other		Hedge
(Millions of Dollars)		Equity		International		Equity		Income		Assets		Funds		Total
Balance as of January 1, 2011		$	266.0	$	-	$	229.5	$	247.6	$	43.7	$	247.1	$	1,033.9
Actual Return/(Loss) on Plan Assets:
	Relating to Assets Still Held as of Year End		(6.6)		-		20.0		(1.5)		1.6		(7.1)		6.4
	Relating to Assets Distributed During the Year		-		-		19.5		(2.8)		0.3		-		17.0
Purchases, Sales and Settlements			-		-		(13.9)		32.9		26.2		-		45.2
Balance as of December 31, 2011		$	259.4	$	-	$	255.1	$	276.2	$	71.8	$	240.0	$	1,102.5
Assets Assumed from Merger with NSTAR			-		41.4		-		-		111.0		126.6		279.0
Actual Return/(Loss) on Plan Assets:
	Relating to Assets Still Held as of Year End		11.2		10.7		17.0		42.1		5.7		21.8		108.5
	Relating to Assets Distributed During the Year		-		-		15.0		0.7		7.6		(0.3)		23.0
Purchases, Sales and Settlements			-		-		(19.2)		(3.9)		39.3		30.8		47.0
Balance as of December 31, 2012		$	270.6	$	52.1	$	267.9	$	315.1	$	235.4	$	418.9	$	1,560.0

		NU Consolidated PBOP Plans
		United						Real Estate
		States		Private		Fixed		and Other			Hedge
(Millions of Dollars)		Equity		Equity		Income		Assets			Funds		Total
Balance as of January 1, 2011		$	10.1	$	0.3	$	23.4	$	-	$	16.4	$	50.2
Actual Return/(Loss) on Plan Assets:
	Relating to Assets Still Held as of Year End		0.6		0.6		0.2		(0.1)		(0.3)		1.0
Purchases, Sales and Settlements			-		4.2		2.4		2.6		-		9.2
Balance as of December 31, 2011		$	10.7	$	5.1	$	26.0	$	2.5	$	16.1	$	60.4
Assets Assumed from Merger with NSTAR			19.7		-		-		18.4		21.4		59.5
Actual Return on Plan Assets:
	Relating to Assets Still Held as of Year End		5.9		1.6		4.0		3.0		2.1		16.6
Purchases, Sales and Settlements			-		4.6		2.1		2.8		-		9.5
Balance as of December 31, 2012		$	36.3	$	11.3	$	32.1	$	26.7	$	39.6	$	146.0

		NSTAR Pension Plan
				Real Estate
				and Other
(Millions of Dollars)		International		Assets		Hedge Funds		Total
Balance as of January 1, 2011		$	45.1	$	86.8	$	157.9	$	289.8
Actual Return/(Loss) on Plan Assets:
	Relating to Assets Still Held as of Year End		(3.7)		8.7		(4.8)		0.2
	Relating to Assets Distributed During the Year		-		-		0.2		0.2
Purchases, Sales and Settlements			-		15.5		(26.7)		(11.2)
Balance as of December 31, 2011		$	41.4	$	111.0	$	126.6	$	279.0
Actual Return/(Loss) on Plan Assets:
	Relating to Assets Still Held as of Year End		10.7		9.9		5.6		26.2
	Relating to Assets Distributed During the Year		-		-		(0.3)		(0.3)
Purchases, Sales and Settlements			-		6.3		(9.2)		(2.9)
Balance as of December 31, 2012		$	52.1	$	127.2	$	122.7	$	302.0

Schedule of Allocation of Plan Assets [Table Text Block]

		As of December 31,
		2012 and 2011		2012		2011		2012
		NUSCO Pension and PBOP		NSTAR Pension Plan		NSTAR Pension Plan		NSTAR PBOP Plan
		Target	Assumed	Target	Assumed	Target	Assumed	Target	Assumed
		Asset	Rate	Asset	Rate	Asset	Rate	Asset	Rate
		Allocation	of Return	Allocation	of Return	Allocation	of Return	Allocation	of Return
Equity Securities:
	United States	24%	9%	25%	8.3%	22%	8.6%	25%	8.3%
	International	13%	9%	13%	8.6%	12%	8.9%	20%	8.6%
	Emerging Markets	3%	10%	5%	8.8%	5%	8.8%	5%	8.8%
	Private Equity	12%	13%	-	-	-	-	-	-
Debt Securities:
	Fixed Income	20%	5%	21%	4.6%	15%	4.4%	30%	4.6%
	High Yield Fixed Income	3.5%	7.5%	9%	6.5%	9%	6.2%	-	-
	Emerging Markets Debt	3.5%	7.5%	4%	6.4%	3%	6.8%	-	-
Real Estate and Other Assets		8%	7.5%	10%	7.9%	11%	7.7%	10%	7.9%
Hedge Funds		13%	7%	13%	8.4%	23%	8.6%	10%	8.4%

		NU Consolidated Pension Plans
		Fair Value Measurements as of December 31,
(Millions of Dollars)		2012								2011
Asset Category:		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Equity Securities:
	United States ⁽²⁾	$	336.5	$	302.8	$	270.6	$	909.9	$	218.7	$	14.8	$	259.4	$	492.9
	International ⁽²⁾		42.0		362.6		52.1		456.7		20.0		221.9		-		241.9
	Emerging Markets⁽²⁾		-		135.3		-		135.3		-		66.6		-		66.6
	Private Equity		26.7		-		267.9		294.6		11.3		-		255.1		266.4
Fixed Income⁽³⁾			54.9		629.2		315.1		999.2		17.8		268.7		276.2		562.7
Real Estate and
	Other Assets		-		78.9		235.4		314.3		24.8		57.8		71.8		154.4
Hedge Funds			-		-		418.9		418.9		-		-		240.0		240.0
Total Master Trust Assets		$	460.1	$	1,508.8	$	1,560.0	$	3,528.9	$	292.6	$	629.8	$	1,102.5	$	2,024.9
	Less: 401(h) PBOP Assets⁽⁴⁾								(117.6)								(19.0)
Total Pension Assets								$	3,411.3							$	2,005.9

		NSTAR Pension Plan
		Fair Value Measurements as of December 31,
(Millions of Dollars)		2012								2011^{(1) (5)}
Asset Category:		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Equity Securities:
	United States ⁽²⁾	$	96.7	$	246.4	$	-	$	343.1	$	77.0	$	212.3	$	-	$	289.3
	International⁽²⁾		-		98.3		52.1		150.4		4.0		82.8		41.4		128.2
	Emerging Markets⁽²⁾		-		55.9		-		55.9		-		46.9		-		46.9
Fixed Income⁽³⁾			54.9		292.5		-		347.4		124.7		230.3		-		355.0
Real Estate			-		-		127.2		127.2		-		-		111.0		111.0
Hedge Funds			-		-		122.7		122.7		-		-		126.6		126.6
Total Master Trust Assets		$	151.6	$	693.1	$	302.0	$	1,146.7	$	205.7	$	572.3	$	279.0	$	1,057.0
	Less: 401(h) PBOP Assets⁽⁴⁾								(77.6)								(68.5)
Total Pension Assets								$	1,069.1							$	988.5

		NU Consolidated PBOP Plans
		Fair Value Measurements as of December 31,
(Millions of Dollars)		2012								2011
Asset Category:		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash and Cash
	Equivalents	$	9.7	$	-	$	-	$	9.7	$	5.9	$	-	$	-	$	5.9
Equity Securities:
	United States⁽²⁾		116.3		57.7		36.3		210.3		116.9		-		10.7		127.6
	International⁽²⁾		68.0		29.7		-		97.7		29.6		-		-		29.6
	Emerging Markets⁽²⁾		7.7		14.0		-		21.7		4.6		-		-		4.6
Fixed Income ⁽³⁾			-		137.7		32.1		169.8		-		44.3		26.0		70.3
Hedge Funds			-		-		39.6		39.6		-		-		16.1		16.1
Private Equity			-		-		11.3		11.3		-		-		5.1		5.1
Real Estate and Other
	Assets		-		4.7		26.7		31.4		-		4.7		2.5		7.2
Total		$	201.7	$	243.8	$	146.0	$	591.5	$	157.0	$	49.0	$	60.4	$	266.4
	Add: 401(h) PBOP Assets⁽⁴⁾								117.6								19.0
Total PBOP Assets								$	709.1							$	285.4

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