Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2015

Notes To Consolidated Financial Statements [Abstract]

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

P.		Supplemental Cash Flow Information
Eversource			As of and For the Years Ended December 31,
(Millions of Dollars)			2015		2014		2013
Cash Paid During the Year for:
	Interest, Net of Amounts Capitalized		$	365.9	$	349.6	$	343.3
	Income Taxes			10.3		334.2		50.0
Non-Cash Investing Activities:
	Plant Additions Included in Accounts Payable (As of)			216.6		181.9		193.1

		As of and For the Years Ended December 31,
		2015								2014								2013
				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	$	144.4	$	75.7	$	42.3	$	26.7	$	144.1	$	75.3	$	41.1	$	25.9	$	131.6	$	75.8	$	43.3	$	25.8
	Income Taxes		55.2		(19.8)		14.4		14.7		135.4		217.1		2.3		25.1		55.0		163.4		(30.1)		(69.0)
Non-Cash Investing Activities:
	Plant Additions Included in Accounts Payable (As of)		76.0		23.5		46.5		27.0		63.5		34.6		39.3		14.2		51.4		57.0		34.9		19.5