REGULATORY ACCOUNTING (Tables)

12 Months Ended

Dec. 31, 2019

Regulated Operations [Abstract]

Components of Regulatory Assets

The components of regulatory assets were as follows:

	As of December 31,
	2019								2018
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Benefit Costs	$	2,382.9	$	539.0	$	629.8	$	218.2	$	1,914.8	$	424.7	$	544.4	$	169.6
Income Taxes, Net	725.8		458.8		108.0		12.8		728.6		454.4		105.9		8.3
Securitized Stranded Costs	565.3		—		—		565.3		608.4		—		—		608.4
Storm Restoration Costs, Net	540.6		274.6		200.6		65.4		576.0		302.6		212.9		60.5
Regulatory Tracker Mechanisms	411.5		78.3		207.1		65.8		316.0		33.2		169.1		67.3
Derivative Liabilities	334.5		329.2		—		—		356.5		356.5		—		—
Goodwill-related	331.5		—		284.6		—		348.4		—		299.1		—
Asset Retirement Obligations	97.2		30.8		50.3		3.6		89.2		32.3		42.2		3.3
Other Regulatory Assets	125.4		25.2		55.2		14.7		208.0		27.0		64.6		12.1
Total Regulatory Assets	5,514.7		1,735.9		1,535.6		945.8		5,145.9		1,630.7		1,438.2		929.5
Less:  Current Portion	651.1		178.6		285.6		84.1		514.8		125.2		241.7		67.2
Total Long-Term Regulatory Assets	$	4,863.6	$	1,557.3	$	1,250.0	$	861.7	$	4,631.1	$	1,505.5	$	1,196.5	$	862.3

Components of Regulatory Liabilities

 The components of regulatory liabilities were as follows:

	As of December 31,
	2019								2018
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
EDIT due to Tax Cuts and Jobs Act	$	2,844.6	$	1,022.8	$	1,071.2	$	392.8	$	2,883.0	$	1,031.0	$	1,103.7	$	396.4
Cost of Removal	559.8		64.6		330.6		16.3		521.0		39.9		307.1		22.1
Benefit Costs	84.5		—		72.2		—		91.2		—		76.9		—
Regulatory Tracker Mechanisms	325.1		94.8		165.6		57.0		309.0		89.5		163.7		48.3
AFUDC - Transmission	73.2		46.0		27.2		—		70.7		47.4		23.3		—
Revenue Subject to Refund due to Tax Cuts   and Jobs Act	14.6		—		—		6.0		24.6		—		—		12.6
Other Regulatory Liabilities	117.4		19.6		59.0		7.1		80.2		24.0		29.2		4.2
Total Regulatory Liabilities	4,019.2		1,247.8		1,725.8		479.2		3,979.7		1,231.8		1,703.9		483.6
Less:  Current Portion	361.2		82.8		209.2		65.8		370.2		109.6		190.6		55.5
Total Long-Term Regulatory Liabilities	$	3,658.0	$	1,165.0	$	1,516.6	$	413.4	$	3,609.5	$	1,122.2	$	1,513.3	$	428.1