Operating Expenses (Table)

Dec. 31, 2011

Notes To Consolidated Financial Statements [Abstract]

Schedule of Fuel Costs

	For the Years Ended December 31,
(Millions of Dollars)	2011		2010		2009
NU	$	307.9	$	391.6	$	401.7
PSNH		115.9		184.3		174.1
Yankee Gas		191.3		206.4		226.1