REGULATORY ACCOUNTING (Tables)

6 Months Ended

Jun. 30, 2018

Regulated Operations [Abstract]

Schedule of Regulatory Assets

The components of regulatory assets were as follows:

	As of June 30, 2018								As of December 31, 2017
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Benefit Costs	$	2,021.6	$	455.5	$	544.8	$	178.0	$	2,068.8	$	469.2	$	560.7	$	212.3
Income Taxes, Net	717.6		451.4		112.7		12.2		768.9		453.8		113.2		21.7
Securitized Stranded Costs	628.8		—		—		628.8		—		—		—		—
Deferred Costs from Generation Asset Sale	—		—		—		—		516.1		—		—		516.1
Storm Restoration Costs	625.7		326.5		247.7		51.5		404.8		216.7		146.6		41.5
Regulatory Tracker Mechanisms	409.3		93.4		193.5		102.3		509.9		85.3		273.0		116.4
Derivative Liabilities	369.5		369.3		—		—		367.2		362.3		—		—
Goodwill-related	356.8		—		306.3		—		365.2		—		313.6		—
Asset Retirement Obligations	85.9		31.3		40.6		3.2		101.0		30.3		39.0		17.0
Other Regulatory Assets	181.1		27.8		70.1		13.2		137.4		27.6		78.4		15.8
Total Regulatory Assets	5,396.3		1,755.2		1,515.7		989.2		5,239.3		1,645.2		1,524.5		940.8
Less:  Current Portion	590.9		198.2		244.5		87.5		741.9		200.3		333.9		130.1
Total Long-Term Regulatory Assets	$	4,805.4	$	1,557.0	$	1,271.2	$	901.7	$	4,497.4	$	1,444.9	$	1,190.6	$	810.7

Schedule of Regulatory Liabilities

The components of regulatory liabilities were as follows:

	As of June 30, 2018								As of December 31, 2017
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Excess ADIT due to Tax Cuts and Jobs Act	$	2,885.3	$	1,031.6	$	1,091.1	$	405.1	$	2,882.0	$	1,031.6	$	1,087.9	$	405.1
Cost of Removal	517.9		34.8		299.5		34.9		502.1		23.2		293.8		37.9
Benefit Costs	131.0		—		110.9		—		132.3		—		112.6		—
Regulatory Tracker Mechanisms	235.7		41.0		90.6		29.8		136.7		34.6		77.8		5.0
AFUDC - Transmission	68.1		48.1		20.0		—		67.1		48.8		18.3		—
Revenue Subject to Refund	36.5		16.6		3.7		6.2		—		—		—		—
Other Regulatory Liabilities	62.6		24.8		15.2		1.9		45.2		12.9		3.7		2.7
Total Regulatory Liabilities	3,937.1		1,196.9		1,631.0		477.9		3,765.4		1,151.1		1,594.1		450.7
Less:  Current Portion	247.4		72.2		90.2		30.0		128.1		39.0		79.6		6.3
Total Long-Term Regulatory Liabilities	$	3,689.7	$	1,124.7	$	1,540.8	$	447.9	$	3,637.3	$	1,112.1	$	1,514.5	$	444.4