Guarantees and Indemnifications (Tables)

6 Months Ended

Jun. 30, 2011

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Guarantee Obligations Text Block

		Maximum
		Exposure
Subsidiary	Description	(in millions)			Expiration Dates
Various	Surety Bonds and Performance Guarantees	$	17.1		2011-2012 (1)
CL&P, PSNH and	Letters of Credit	$	20.6		October 2011 -
Select Energy					December 2011 -
RRR and NUSCO	Lease Payments for Real Estate and Vehicles	$	21.8		2019-2024
NU Enterprises	Surety Bonds, Insurance Bonds and Performance Guarantees	$	137.4	(2)	(2)