Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule of Reclassification Adjustments [Table Text Block]

	For the Three Months Ended March 31, 2012
(Millions of Dollars)	Transmission Expense		Energy Efficiency Expense
NU	$	(2.7)	$	37.3
CL&P		(2.9)		22.0
PSNH		7.9		3.6
WMECO		1.0		5.6