Guarantees and Indemnifications (Tables)

9 Months Ended

Sep. 30, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Guarantee Obligations Text Block

		Maximum Exposure
Subsidiary	Description	(in millions)			Expiration Dates
Various	Surety Bonds	$	33.0		2013 - 2015 (1)
Various	New England Hydro Companies' Long-Term Debt	$	4.0		Unspecified
NUSCO and RRR	Lease Payments for Vehicles and Real Estate	$	18.8		2019 and 2024
NU Enterprises	Surety Bonds, Performance Guarantees and Insurance Bond	$	62.3	(2)	(2)