Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2013

Notes To Consolidated Financial Statements [Abstract]

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

P.		Supplemental Cash Flow Information
NU			As of and For the Years Ended December 31,
(Millions of Dollars)			2013		2012 (1)		2011
Cash Paid/(Received) During the Year for:
	Interest, Net of Amounts Capitalized		$	343.3	$	356.5	$	256.3
	Income Taxes			50.0		(12.8)		(76.6)
Non-Cash Investing Activities:
	Plant Additions Included in Accounts Payable (As of)			193.1		160.6		168.5
(1) NSTAR amounts were included in NU beginning April 10, 2012.

		As of and For the Years Ended December 31,
		2013								2012								2011
				NSTAR								NSTAR								NSTAR
(Millions of Dollars)		CL&P		Electric		PSNH		WMECO		CL&P		Electric		PSNH		WMECO		CL&P		Electric		PSNH		WMECO
Cash Paid/(Received) During
	the Year for:
	Interest, Net of Amounts
	Capitalized	$	131.6	$	75.8	$	43.3	$	25.8	$	129.4	$	94.6	$	49.8	$	25.8	$	136.6	$	96.1	$	49.3	$	22.1
	Income Taxes		55.0		163.4		(30.1)		(69.0)		(42.0)		88.1		14.7		(8.4)		(27.5)		(62.2)		(29.0)		(4.9)
Non-Cash Investing Activities:
	Plant Additions Included in
	Accounts Payable (As of)		51.4		57.0		34.9		19.5		42.8		50.0		16.8		30.0		32.7		34.3		51.1		61.3