Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2013

Notes To Consolidated Financial Statements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

H.	Supplemental Cash Flow Information
Non-cash investing activities include plant additions included in Accounts Payable as follows:
(Millions of Dollars)		As of March 31, 2013		As of March 31, 2012
NU		$	98.7	$	138.5
CL&P			28.2		36.6
NSTAR Electric (1)			30.7		29.5
PSNH			12.9		32.5
WMECO			15.8		56.6
(1) NSTAR Electric amounts are not included in NU consolidated as of March 31, 2012.