Provision for Uncollectible Accounts (Tables)

3 Months Ended

Mar. 31, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule Of Accounts Notes Loans And Financing Receivable Text Block

(Millions of Dollars)	As of March 31, 2013		As of December 31, 2012
NU	$	178.6	$	165.5
CL&P		85.0		77.6
NSTAR Electric		44.8		44.1
PSNH		7.4		6.8
WMECO		9.0		8.5