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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)
 3 Months Ended
Mar. 31, 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 March 31, 2019
 
As of December 31, 2018
(Millions of Dollars)
 
Distribution - Electric
$
15,245.9

 
$
15,071.1

Distribution - Natural Gas
3,635.6

 
3,546.2

Transmission - Electric
10,251.1

 
10,153.9

Distribution - Water
1,649.5

 
1,639.8

Solar
169.9

 
164.1

Utility
30,952.0

 
30,575.1

Other (1)
798.3

 
778.6

Property, Plant and Equipment, Gross
31,750.3

 
31,353.7

Less:  Accumulated Depreciation
 
 
 
Utility   
(7,229.5
)
 
(7,126.2
)
Other
(348.7
)
 
(336.7
)
Total Accumulated Depreciation
(7,578.2
)
 
(7,462.9
)
Property, Plant and Equipment, Net
24,172.1

 
23,890.8

Construction Work in Progress
1,860.7

 
1,719.6

Total Property, Plant and Equipment, Net
$
26,032.8

 
$
25,610.4


 
As of March 31, 2019
 
As of December 31, 2018
(Millions of Dollars)
CL&P
 
NSTAR
Electric
 
PSNH
 
CL&P
 
NSTAR
Electric
 
PSNH
Distribution - Electric
$
6,255.8

 
$
6,828.5

 
$
2,201.8

 
$
6,176.4

 
$
6,756.4

 
$
2,178.6

Transmission - Electric
4,746.4

 
4,085.6

 
1,370.2

 
4,700.5

 
4,065.9

 
1,338.7

Solar
—

 
169.9

 
—

 
—

 
164.1

 
—

Property, Plant and Equipment, Gross
11,002.2

 
11,084.0

 
3,572.0

 
10,876.9

 
10,986.4

 
3,517.3

Less:  Accumulated Depreciation
(2,328.0
)
 
(2,749.9
)
 
(789.3
)
 
(2,302.6
)
 
(2,702.0
)
 
(772.9
)
Property, Plant and Equipment, Net
8,674.2

 
8,334.1

 
2,782.7

 
8,574.3

 
8,284.4

 
2,744.4

Construction Work in Progress
391.7

 
581.5

 
137.9

 
335.4

 
510.3

 
135.7

Total Property, Plant and Equipment, Net
$
9,065.9

 
$
8,915.6

 
$
2,920.6

 
$
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.