Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)

3 Months Ended

Mar. 31, 2012

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Net Benefit Costs [Table Text Block]

		For the Three Months Ended March 31, 2012
		Pension and SERP								PBOP
(Millions of Dollars)		NU		CL&P		PSNH		WMECO		NU		CL&P		PSNH		WMECO
Service Cost		$	15.3	$	5.4	$	2.9	$	1.1	$	2.3	$	0.8	$	0.5	$	0.2
Interest Cost			38.1		12.8		6.1		2.6		6.2		2.4		1.2		0.5
Expected Return on Plan Assets			(42.5)		(17.5)		(6.7)		(4.1)		(5.6)		(2.3)		(1.1)		(0.5)
Actuarial Loss			30.1		11.9		3.9		2.5		5.5		2.0		1.0		0.3
Prior Service Cost/(Credit)			2.1		0.9		0.4		0.2		(0.1)		-		-		-
Net Transition Obligation Cost			-		-		-		-		2.9		1.5		0.6		0.3
Total Net Periodic Benefit Expense		$	43.1	$	13.5	$	6.6	$	2.3	$	11.2	$	4.4	$	2.2	$	0.8
Related Intercompany
	Allocations		N/A	$	10.6	$	2.5	$	2.0		N/A	$	2.1	$	0.5	$	0.4
Capitalized Pension Expense		$	10.6	$	6.6	$	2.0	$	1.2
		For the Three Months Ended March 31, 2011
		Pension and SERP								PBOP
(Millions of Dollars)		NU		CL&P		PSNH		WMECO		NU		CL&P		PSNH		WMECO
Service Cost		$	13.7	$	4.8	$	2.6	$	1.0	$	2.4	$	0.7	$	0.5	$	0.1
Interest Cost			38.2		13.1		6.2		2.7		6.4		2.5		1.2		0.6
Expected Return on Plan Assets			(43.1)		(19.2)		(5.3)		(4.4)		(5.4)		(2.1)		(1.1)		(0.5)
Actuarial Loss			21.0		8.4		2.6		1.7		4.5		1.7		0.7		0.3
Prior Service Cost/(Credit)			2.4		1.0		0.5		0.2		(0.1)		-		-		-
Net Transition Obligation Cost			-		-		-		-		2.9		1.5		0.6		0.3
Total Net Periodic Benefit Expense		$	32.2	$	8.1	$	6.6	$	1.2	$	10.7	$	4.3	$	1.9	$	0.8
Related Intercompany
	Allocations		N/A	$	8.3	$	2.0	$	1.6		N/A	$	2.1	$	0.4	$	0.5
Capitalized Pension Expense		$	7.6	$	4.5	$	1.8	$	0.7