LEASES (Tables)

12 Months Ended

Dec. 31, 2011

Notes To Consolidated Financial Statements [Abstract]

Schedule of Rent Expense [Table Text Block]

	Rental Payments						Interest						Asset Amortization
(Millions of Dollars)	NU		CL&P		PSNH		NU		CL&P		PSNH		NU		CL&P		PSNH
2011	$	2.7	$	2.0	$	0.6	$	1.7	$	1.5	$	0.2	$	1.0	$	0.5	$	0.4
2010		2.5		1.9		0.5		1.8		1.5		0.3		0.7		0.4		0.2
2009		2.6		1.9		0.5		1.9		1.6		0.3		0.6		0.3		0.2

	Expensed								Capitalized
(Millions of Dollars)	NU		CL&P		PSNH		WMECO		NU		CL&P		PSNH		WMECO
2011	$	8.4	$	8.3	$	2.1	$	2.8	$	1.4	$	0.8	$	0.1	$	0.1
2010		11.9		10.0		2.2		2.6		4.8		3.8		0.1		0.1
2009		18.1		12.8		3.9		3.4		9.7		6.1		1.5		1.1

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

Capital Leases
(Millions of Dollars)	NU		CL&P		PSNH
2012	$	3.0	$	2.3	$	0.6
2013		2.6		2.1		0.5
2014		2.2		1.9		0.2
2015		2.2		1.9		0.2
2016		2.0		1.9		0.1
Thereafter		9.5		9.4		-
Future minimum lease payments		21.5		19.5		1.6
Less amount representing interest		9.1		8.8		0.3
Present value of future minimum lease payments	$	12.4	$	10.7	$	1.3

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

Operating Leases
(Millions of Dollars)	NU		CL&P		PSNH		WMECO
2012	$	7.7	$	3.2	$	1.2	$	2.6
2013		6.9		2.8		1.0		2.5
2014		4.9		2.6		0.8		0.9
2015		4.3		2.6		0.8		0.5
2016		4.3		2.6		0.8		0.4
Thereafter		16.6		12.0		2.3		1.3
Future minimum lease payments	$	44.7	$	25.8	$	6.9	$	8.2