Equity Method Investments (Tables)

12 Months Ended

Dec. 31, 2011

Notes To Consolidated Financial Statements [Abstract]

Schedule of Equity Method Investments [Table Text Block]

(Percent)	CYAPC		YAEC		MYAPC
CL&P	34.5		24.5		12.0
PSNH	5.0		7.0		5.0
WMECO	9.5		7.0		3.0
Total NU	49.0	%	38.5	%	20.0	%

(Millions of Dollars)	2011		2010
CL&P	$	1.4	$	1.3
PSNH		0.3		0.3
WMECO		0.4		0.4
Total NU	$	2.1	$	2.0