Equity Method Investments (Tables)

12 Months Ended

Dec. 31, 2014

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	%
NSTAR Electric	14.0		14.0		4.0
PSNH	5.0		7.0		5.0
WMECO	9.5		7.0		3.0

	As of December 31,
(Millions of Dollars)	2014		2013
CL&P	$	1.2	$	1.2
NSTAR Electric		0.5		0.5
PSNH		0.3		0.3
WMECO		0.3		0.3