Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)

3 Months Ended

Mar. 31, 2016

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Net Benefit Costs [Table Text Block]

	Pension and SERP
Eversource	For the Three Months Ended
(Millions of Dollars)	March 31, 2016		March 31, 2015(1)
Service Cost	$	19.4	$	23.2
Interest Cost		46.5		56.6
Expected Return on Plan Assets		(79.6)		(84.3)
Actuarial Loss		31.5		38.9
Prior Service Cost		0.9		0.9
Total Net Periodic Benefit Expense	$	18.7	$	35.3
Capitalized Pension Expense	$	6.1	$	9.6
	PBOP
Eversource	For the Three Months Ended
(Millions of Dollars)		March 31, 2016	March 31, 2015(1)
Service Cost	$	3.1	$	4.2
Interest Cost		9.7		11.9
Expected Return on Plan Assets		(15.7)		(16.8)
Actuarial Loss		1.1		1.8
Prior Service Credit		(0.1)		(0.1)
Total Net Periodic Benefit Expense/(Income)	$	(1.9)	$	1.0
Capitalized PBOP Expense/(Income)	$	(0.9)	$	0.2

	Pension and SERP
	For the Three Months Ended March 31, 2016								For the Three Months Ended March 31, 2015
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric		PSNH		WMECO		CL&P		Electric		PSNH (1)		WMECO
Service Cost	$	5.0	$	3.4	$	2.5	$	0.9	$	6.0	$	3.8	$	2.9	$	1.1
Interest Cost		10.6		8.3		5.1		2.1		12.7		10.2		5.9		2.5
Expected Return on Plan Assets		(18.2)		(16.9)		(9.7)		(4.4)		(19.7)		(17.6)		(10.0)		(4.7)
Actuarial Loss		6.7		8.4		2.5		1.4		8.2		9.6		3.0		1.6
Prior Service Cost		0.4		-		0.1		0.1		0.4		-		0.1		0.1
Total Net Periodic Benefit Expense	$	4.5	$	3.2	$	0.5	$	0.1	$	7.6	$	6.0	$	1.9	$	0.6
Intercompany Allocations	$	3.3	$	2.2	$	1.0	$	0.6	$	6.4	$	3.6	$	1.7	$	1.2
Capitalized Pension Expense	$	2.7	$	1.8	$	0.3	$	0.2	$	4.3	$	2.8	$	0.8	$	0.5

	PBOP
	For the Three Months Ended March 31, 2016								For the Three Months Ended March 31, 2015
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric		PSNH		WMECO		CL&P		Electric		PSNH (1)		WMECO
Service Cost	$	0.5	$	0.9	$	0.3	$	0.1	$	0.6	$	1.3	$	0.4	$	0.1
Interest Cost		1.4		4.0		0.8		0.3		1.8		4.8		1.0		0.4
Expected Return on Plan Assets		(2.6)		(6.4)		(1.4)		(0.6)		(2.8)		(6.8)		(1.5)		(0.6)
Actuarial Loss		0.2		0.2		0.1		-		0.2		0.8		0.1		-
Prior Service Credit		-		-		-		-		-		(0.1)		-		-
Total Net Periodic Benefit Income	$	(0.5)	$	(1.3)	$	(0.2)	$	(0.2)	$	(0.2)	$	-	$	-	$	(0.1)
Intercompany Allocations	$	0.2	$	0.1	$	0.0	$	0.0	$	0.5	$	0.3	$	0.1	$	0.1
Capitalized PBOP Expense/(Income)	$	(0.2)	$	(0.6)	$	0.0	$	(0.1)	$	0.0	$	0.1	$	-	$	-
(1) Amounts excluded approximately $1 million for the three months ended March 31, 2015 that represented amounts included in other deferred debits.