Pension Benefits and Postretirement Benefits Other Than Pensions (Tables)

3 Months Ended

Sep. 30, 2015

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Net Benefit Costs [Table Text Block]

	Pension and SERP				Pension and SERP
Eversource	For the Three Months Ended				For the Nine Months Ended
(Millions of Dollars)	September 30, 2015 (1)		September 30, 2014		September 30, 2015 (1)		September 30, 2014
Service Cost	$	22.7	$	19.1	$	68.7	$	60.7
Interest Cost		56.9		56.4		170.3		169.5
Expected Return on Plan Assets		(83.9)		(77.7)		(252.1)		(233.1)
Actuarial Loss		36.5		31.7		111.9		96.5
Prior Service Cost		0.9		1.1		2.7		3.3
Total Net Periodic Benefit Expense	$	33.1	$	30.6	$	101.5	$	96.9
Capitalized Pension Expense	$	9.8	$	8.3	$	31.3	$	26.7
	PBOP				PBOP
Eversource	For the Three Months Ended				For the Nine Months Ended
(Millions of Dollars)	September 30, 2015 (1)		September 30, 2014		September 30, 2015 (1)		September 30, 2014
Service Cost	$	4.1	$	3.1	$	10.3	$	9.3
Interest Cost		11.8		12.4		30.4		37.1
Expected Return on Plan Assets		(16.9)		(15.8)		(43.2)		(47.4)
Actuarial Loss		1.7		3.0		4.5		9.1
Prior Service Credit		(0.1)		(0.7)		(0.3)		(2.1)
Total Net Periodic Benefit Expense	$	0.6	$	2.0	$	1.7	$	6.0
Capitalized PBOP Expense/(Income)	$	-	$	1.1	$	0.1	$	1.9

	Pension and SERP
	For the Three Months Ended September 30, 2015								For the Three Months Ended September 30, 2014
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric		PSNH (1)		WMECO		CL&P		Electric		PSNH		WMECO
Service Cost	$	6.2	$	3.7	$	3.1	$	1.0	$	5.0	$	3.0	$	2.3	$	0.8
Interest Cost		12.9		10.0		6.1		2.6		12.5		10.3		5.7		2.5
Expected Return on Plan Assets		(19.8)		(17.5)		(10.1)		(4.7)		(18.7)		(15.7)		(9.3)		(4.4)
Actuarial Loss		8.0		8.7		2.9		1.6		8.2		5.9		2.8		1.7
Prior Service Cost		0.4		-		0.1		0.1		0.4		-		0.1		0.1
Total Net Periodic Benefit Expense	$	7.7	$	4.9	$	2.1	$	0.6	$	7.4	$	3.5	$	1.6	$	0.7
Intercompany Allocations	$	5.8	$	3.4	$	1.6	$	1.1	$	6.5	$	2.9	$	1.8	$	1.2
Capitalized Pension Expense	$	4.7	$	2.7	$	0.8	$	0.5	$	4.3	$	2.6	$	0.7	$	0.6
	Pension and SERP
	For the Nine Months Ended September 30, 2015								For the Nine Months Ended September 30, 2014
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric		PSNH (1)		WMECO		CL&P		Electric		PSNH		WMECO
Service Cost	$	18.4	$	11.2	$	9.0	$	3.2	$	15.2	$	10.6	$	7.4	$	2.7
Interest Cost		38.4		30.2		18.1		7.8		38.1		31.0		18.0		7.8
Expected Return on Plan Assets		(59.1)		(52.5)		(30.3)		(14.2)		(56.7)		(47.3)		(28.8)		(13.5)
Actuarial Loss		24.2		27.0		8.8		4.8		25.5		17.6		8.9		5.2
Prior Service Cost		1.1		0.1		0.4		0.2		1.4		-		0.5		0.3
Total Net Periodic Benefit Expense	$	23.0	$	16.0	$	6.0	$	1.8	$	23.5	$	11.9	$	6.0	$	2.5
Intercompany Allocations	$	18.0	$	10.3	$	5.0	$	3.3	$	20.8	$	6.7	$	6.0	$	3.9
Capitalized Pension Expense	$	14.1	$	8.6	$	2.6	$	1.4	$	13.6	$	5.5	$	2.4	$	2.0

	PBOP
	For the Three Months Ended September 30, 2015								For the Three Months Ended September 30, 2014
			NSTAR								NSTAR
(Millions of Dollars)	CL&P		Electric			PSNH (1)		WMECO	CL&P		Electric		PSNH		WMECO
Service Cost	$	0.5	$	1.3	$	0.3	$	0.1	$	0.6	$	0.8	$	0.3	$	0.1
Interest Cost		1.8		4.8		1.0		0.3		2.0		4.9		1.1		0.4
Expected Return on Plan Assets		(2.8)		(6.8)		(1.5)		(0.6)		(2.6)		(6.5)		(1.4)		(0.6)
Actuarial Loss/(Gain)		0.2		0.6		0.1		-		1.0		(0.1)		0.6		0.1
Prior Service Credit		-		(0.1)		-		-		-		(0.5)		-		-
Total Net Periodic Benefit Expense/(Income)	$	(0.3)	$	(0.2)	$	(0.1)	$	(0.2)	$	1.0	$	(1.4)	$	0.6	$	0.0
Intercompany Allocations	$	0.4	$	0.2	$	0.1	$	0.1	$	0.9	$	0.3	$	0.2	$	0.2
Capitalized PBOP Expense/(Income)	$	(0.1)	$	-	$	0.1	$	-	$	0.5	$	(0.5)	$	0.2	$	-
	PBOP
	For the Nine Months Ended September 30, 2015								For the Nine Months Ended September 30, 2014
			NSTAR									NSTAR
(Millions of Dollars)	CL&P		Electric			PSNH (1)		WMECO	CL&P			Electric	PSNH		WMECO
Service Cost	$	1.6	$	4.0	$	1.0	$	0.3	$	1.7	$	2.3	$	1.0	$	0.3
Interest Cost		5.4		14.2		2.9		1.1		6.0		14.6		3.2		1.3
Expected Return on Plan Assets		(8.3)		(20.5)		(4.4)		(1.9)		(7.9)		(19.5)		(4.1)		(1.7)
Actuarial Loss/(Gain)		0.5		1.8		0.4		-		3.2		(0.4)		1.7		0.3
Prior Service Credit		-		(0.1)		-		-		-		(1.4)		-		-
Total Net Periodic Benefit Expense/(Income)	$	(0.8)	$	(0.6)	$	(0.1)	$	(0.5)	$	3.0	$	(4.4)	$	1.8	$	0.2
Intercompany Allocations	$	1.4	$	0.7	$	0.3	$	0.3	$	3.1	$	0.4	$	0.8	$	0.6
Capitalized PBOP Expense/(Income)	$	(0.2)	$	(0.1)	$	0.2	$	(0.1)	$	1.5	$	(1.5)	$	0.6	$	0.1
(1) Amounts exclude approximately $0.8 million and $2.4 million for the three and nine months ended September 30, 2015, respectively, that represented amounts included in other deferred debits.