Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2012

Notes To Consolidated Financial Statements [Abstract]

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

(Millions of Dollars)	As of September 30, 2012		As of September 30, 2011 (1)
NU	$	139.9	$	121.7
CL&P		45.9		22.1
NSTAR Electric		21.5		29.4
PSNH		20.1		32.4
WMECO		35.1		45.8