REGULATORY ACCOUNTING (Tables)

9 Months Ended

Sep. 30, 2017

Regulated Operations [Abstract]

Schedule of Regulatory Assets

The components of regulatory assets were as follows:

Eversource	As of September 30, 2017		As of December 31, 2016
(Millions of Dollars)
Benefit Costs	$	1,793.8	$	1,817.8
Derivative Liabilities	385.1		423.3
Income Taxes, Net	652.7		644.5
Storm Restoration Costs	330.1		385.3
Goodwill-related	449.0		464.4
Regulatory Tracker Mechanisms	470.7		576.6
Asset Retirement Obligations	104.8		99.3
Other Regulatory Assets	65.8		115.1
Total Regulatory Assets	4,252.0		4,526.3
Less:  Current Portion	746.1		887.6
Total Long-Term Regulatory Assets	$	3,505.9	$	3,638.7

	As of September 30, 2017								As of December 31, 2016
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		WMECO		CL&P		NSTAR Electric		PSNH		WMECO
Benefit Costs	$	415.8	$	436.7	$	183.2	$	84.8	$	429.3	$	438.6	$	184.2	$	86.7
Derivative Liabilities	381.6		2.4		—		—		420.5		2.8		—		—
Income Taxes, Net	441.1		92.4		22.3		30.5		437.0		89.7		24.2		30.8
Storm Restoration Costs	195.7		112.4		9.2		12.8		239.8		112.5		17.1		15.9
Goodwill-related	—		385.5		—		—		—		398.7		—		—
Regulatory Tracker Mechanisms	87.9		201.1		108.0		44.4		123.9		257.3		104.5		46.7
Asset Retirement Obligations	35.1		33.9		16.8		4.5		33.2		31.9		16.2		4.2
Other Regulatory Assets	30.0		15.5		17.6		5.4		43.4		15.6		16.5		7.1
Total Regulatory Assets	1,587.2		1,279.9		357.1		182.4		1,727.1		1,347.1		362.7		191.4
Less:  Current Portion	275.0		230.6		112.5		60.6		335.5		289.4		117.2		64.1
Total Long-Term Regulatory Assets	$	1,312.2	$	1,049.3	$	244.6	$	121.8	$	1,391.6	$	1,057.7	$	245.5	$	127.3

Schedule of Regulatory Liabilities

The components of regulatory liabilities were as follows:

Eversource	As of September 30, 2017		As of December 31, 2016
(Millions of Dollars)
Cost of Removal	$	470.3	$	459.7
Benefit Costs	125.5		136.2
Regulatory Tracker Mechanisms	175.8		145.3
AFUDC - Transmission	65.4		65.8
Other Regulatory Liabilities	33.4		42.1
Total Regulatory Liabilities	870.4		849.1
Less:  Current Portion	170.2		146.8
Total Long-Term Regulatory Liabilities	$	700.2	$	702.3

	As of September 30, 2017								As of December 31, 2016
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		WMECO		CL&P		NSTAR Electric		PSNH		WMECO
Cost of Removal	$	40.5	$	278.8	$	40.5	$	11.7	$	38.8	$	271.6	$	44.1	$	8.6
Benefit Costs	—		106.0		—		—		—		113.1		—		—
Regulatory Tracker Mechanisms	57.1		65.5		5.6		12.7		37.2		63.7		10.7		14.7
AFUDC - Transmission	49.2		7.7		—		8.5		50.2		6.9		—		8.7
Other Regulatory Liabilities	21.3		0.4		2.6		—		21.0		0.2		2.7		0.1
Total Regulatory Liabilities	168.1		458.4		48.7		32.9		147.2		455.5		57.5		32.1
Less:  Current Portion	69.3		65.5		7.9		10.2		47.1		63.7		12.7		14.9
Total Long-Term Regulatory Liabilities	$	98.8	$	392.9	$	40.8	$	22.7	$	100.1	$	391.8	$	44.8	$	17.2