Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2012

Notes To Consolidated Financial Statements [Abstract]

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

(Millions of Dollars)	As of June 30, 2012		As of June 30, 2011(1)
NU	$	166.3	$	109.4
CL&P		45.1		19.4
NSTAR Electric		22.7		18.8
PSNH		25.7		29.6
WMECO		56.5		39.7