Operating Expenses (Tables)

12 Months Ended

Dec. 31, 2015

Notes To Consolidated Financial Statements [Abstract]

Schedule of Fuel Costs [Table Text Block]

	For the Years Ended December 31,
(Millions of Dollars)	2015		2014		2013
Eversource - Natural Gas and Fuel	$	516.7	$	599.4	$	466.5
PSNH - Fuel		85.4		113.4		104.8