LEASES (Tables)

12 Months Ended

Dec. 31, 2014

Notes To Consolidated Financial Statements [Abstract]

Schedule of Rent Expense [Table Text Block]

					NSTAR
(Millions of Dollars)	NU (1)		CL&P		Electric		PSNH		WMECO
2014	$	14.3	$	6.0	$	7.8	$	1.5	$	1.2
2013		16.3		8.1		6.7		1.7		2.9
2012		14.8		8.2		6.2		2.5		3.0

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

Capital Leases
(Millions of Dollars)	NU		CL&P		PSNH
2015	$	2.4	$	2.0	$	0.4
2016		2.2		1.9		0.3
2017		2.1		2.0		0.1
2018		2.1		2.0		0.1
2019		2.0		2.0		0.0
Thereafter		3.5		3.5		0.0
Future minimum lease payments		14.3		13.4		0.9
Less amount representing interest		4.9		5.0		0.0
Present value of future minimum lease payments	$	9.4	$	8.4	$	0.9

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Operating Leases					NSTAR
(Millions of Dollars)	NU		CL&P		Electric		PSNH		WMECO
2015	$	20.1	$	4.3	$	10.0	$	1.1	$	1.2
2016		17.6		3.8		8.8		1.0		1.0
2017		14.6		2.6		7.7		0.8		0.8
2018		10.5		1.5		5.8		0.6		0.6
2019		8.6		1.1		4.7		0.5		0.6
Thereafter		22.5		4.0		10.4		1.5		2.5
Future minimum lease payments	$	93.9	$	17.3	$	47.4	$	5.5	$	6.7