Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)

3 Months Ended

Mar. 31, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Net Benefit Costs [Table Text Block]

	Pension and SERP
	For the Three Months Ended
	March 31, 2013		March 31, 2012
(Millions of Dollars)	NU		NU
Service Cost	$	26.6	$	15.3
Interest Cost		51.4		38.1
Expected Return on Plan Assets		(70.3)		(42.5)
Actuarial Loss		52.9		30.1
Prior Service Cost		1.1		2.1
Total Net Periodic Benefit Expense	$	61.7	$	43.1
Capitalized Pension Expense	$	16.7	$	10.6
	PBOP
	For the Three Months Ended
	March 31, 2013		March 31, 2012
(Millions of Dollars)	NU		NU
Service Cost	$	4.8	$	2.3
Interest Cost		12.8		6.2
Expected Return on Plan Assets		(13.8)		(5.6)
Actuarial Loss		8.2		5.5
Prior Service Credit		(0.6)		(0.1)
Net Transition Obligation Cost		-		2.9
Total Net Periodic Benefit Expense	$	11.4	$	11.2

		Pension and SERP
		For the Three Months Ended March 31, 2013								For the Three Months Ended March 31, 2012
				NSTAR								NSTAR
(Millions of Dollars)		CL&P		Electric		PSNH		WMECO		CL&P		Electric(1)		PSNH		WMECO
Service Cost		$	6.1	$	9.3	$	3.3	$	1.2	$	5.4	$	7.8	$	2.9	$	1.1
Interest Cost			12.1		14.2		6.0		2.5		12.8		14.8		6.1		2.6
Expected Return on Plan Assets			(18.5)		(22.0)		(7.7)		(4.3)		(17.5)		(16.5)		(6.7)		(4.1)
Actuarial Loss			14.1		14.5		5.5		3.0		11.9		15.7		3.9		2.5
Prior Service Cost/(Credit)			0.5		-		0.1		0.1		0.9		(0.2)		0.4		0.2
Total Net Periodic Benefit Expense		$	14.3	$	16.0	$	7.2	$	2.5	$	13.5	$	21.6	$	6.6	$	2.3
Related Intercompany
	Allocations	$	10.7	$	(2.0)	$	2.6	$	1.8	$	10.6	$	(3.1)	$	2.5	$	2.0
Capitalized Pension Expense		$	7.0	$	5.3	$	2.2	$	1.3	$	6.6	$	6.3	$	2.0	$	1.2

		PBOP
		For the Three Months Ended March 31, 2013						For the Three Months Ended March 31, 2012
(Millions of Dollars)		CL&P			PSNH		WMECO	CL&P		PSNH		WMECO
Service Cost		$	0.9	$	0.6	$	0.2	$	0.8	$	0.5	$	0.2
Interest Cost			2.0		1.0		0.4		2.4		1.2		0.5
Expected Return on Plan Assets			(2.5)		(1.3)		(0.6)		(2.3)		(1.1)		(0.5)
Actuarial Loss			1.7		0.9		0.3		2.0		1.0		0.3
Net Transition Obligation Cost			-		-		-		1.5		0.6		0.3
Total Net Periodic Benefit Expense		$	2.1	$	1.2	$	0.3	$	4.4	$	2.2	$	0.8
Related Intercompany
	Allocations	$	1.6	$	0.4	$	0.3	$	2.1	$	0.5	$	0.4