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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)
 6 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
Public Utility Property, Plant, and Equipment

The following tables summarize property, plant and equipment by asset category:
Eversource
As of June 30, 2019
 
As of December 31, 2018
(Millions of Dollars)
 
Distribution - Electric
$
15,472.1

 
$
15,071.1

Distribution - Natural Gas
3,632.9

 
3,546.2

Transmission - Electric
10,449.5

 
10,153.9

Distribution - Water
1,664.1

 
1,639.8

Solar
196.9

 
164.1

Utility
31,415.5

 
30,575.1

Other (1)
882.4

 
778.6

Property, Plant and Equipment, Gross
32,297.9

 
31,353.7

Less:  Accumulated Depreciation
 
 
 
Utility   
(7,357.9
)
 
(7,126.2
)
Other
(363.1
)
 
(336.7
)
Total Accumulated Depreciation
(7,721.0
)
 
(7,462.9
)
Property, Plant and Equipment, Net
24,576.9

 
23,890.8

Construction Work in Progress
1,727.5

 
1,719.6

Total Property, Plant and Equipment, Net
$
26,304.4

 
$
25,610.4


 
As of June 30, 2019
 
As of December 31, 2018
(Millions of Dollars)
CL&P
 
NSTAR
Electric
 
PSNH
 
CL&P
 
NSTAR
Electric
 
PSNH
Distribution - Electric
$
6,352.8

 
$
6,921.3

 
$
2,238.3

 
$
6,176.4

 
$
6,756.4

 
$
2,178.6

Transmission - Electric
4,880.6

 
4,148.8

 
1,415.2

 
4,700.5

 
4,065.9

 
1,338.7

Solar
—

 
196.9

 
—

 
—

 
164.1

 
—

Property, Plant and Equipment, Gross
11,233.4

 
11,267.0

 
3,653.5

 
10,876.9

 
10,986.4

 
3,517.3

Less:  Accumulated Depreciation
(2,352.2
)
 
(2,814.9
)
 
(806.4
)
 
(2,302.6
)
 
(2,702.0
)
 
(772.9
)
Property, Plant and Equipment, Net
8,881.2

 
8,452.1

 
2,847.1

 
8,574.3

 
8,284.4

 
2,744.4

Construction Work in Progress
404.4

 
623.7

 
122.2

 
335.4

 
510.3

 
135.7

Total Property, Plant and Equipment, Net
$
9,285.6

 
$
9,075.8

 
$
2,969.3

 
$
8,909.7

 
$
8,794.7

 
$
2,880.1



(1) 
These assets are primarily comprised of building improvements, computer software, hardware and equipment at Eversource Service.