XML 74 R22.htm IDEA: XBRL DOCUMENT v2.3.0.15
Provision for Uncollectible Accounts (Tables)
9 Months Ended
Sep. 30, 2011
Notes To Consolidated Financial Statements [Abstract] 
Schedule Of Accounts Notes Loans And Financing Receivable Text Block
(Millions of Dollars) As of September 30, 2011 As of December 31, 2010
NU $34.0 $39.8
CL&P  13.9  17.2
PSNH  7.3  6.8
WMECO  4.3  6.0