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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)
 9 Months Ended
Sep. 30, 2020
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant, and Equipment

The following tables summarize property, plant and equipment by asset category:
Eversource
As of September 30, 2020
 
As of December 31, 2019
(Millions of Dollars)
 
Distribution - Electric
$
16,435.4

 
$
15,880.0

Distribution - Natural Gas
4,073.0

 
3,931.1

Transmission - Electric
11,601.7

 
10,958.4

Distribution - Water
1,683.8

 
1,726.5

Solar
201.2

 
200.2

Utility
33,995.1

 
32,696.2

Other (1)
1,193.0

 
1,025.6

Property, Plant and Equipment, Gross
35,188.1

 
33,721.8

Less:  Accumulated Depreciation
 
 
 
Utility   
(7,731.0
)
 
(7,483.5
)
Other
(455.2
)
 
(387.4
)
Total Accumulated Depreciation
(8,186.2
)
 
(7,870.9
)
Property, Plant and Equipment, Net
27,001.9

 
25,850.9

Construction Work in Progress
2,091.1

 
1,734.6

Total Property, Plant and Equipment, Net
$
29,093.0

 
$
27,585.5


 
As of September 30, 2020
 
As of December 31, 2019
(Millions of Dollars)
CL&P
 
NSTAR
Electric
 
PSNH
 
CL&P
 
NSTAR
Electric
 
PSNH
Distribution - Electric
$
6,728.7

 
$
7,414.0

 
$
2,332.9

 
$
6,485.5

 
$
7,163.7

 
$
2,271.1

Transmission - Electric
5,299.0

 
4,608.9

 
1,689.0

 
5,043.0

 
4,411.9

 
1,498.7

Solar
—

 
201.2

 
—

 
—

 
200.2

 
—

Property, Plant and Equipment, Gross
12,027.7

 
12,224.1

 
4,021.9

 
11,528.5

 
11,775.8

 
3,769.8

Less:  Accumulated Depreciation
(2,453.1
)
 
(3,022.7
)
 
(832.8
)
 
(2,385.7
)
 
(2,895.3
)
 
(799.9
)
Property, Plant and Equipment, Net
9,574.6

 
9,201.4

 
3,189.1

 
9,142.8

 
8,880.5

 
2,969.9

Construction Work in Progress
490.7

 
742.0

 
130.4

 
483.0

 
592.3

 
159.6

Total Property, Plant and Equipment, Net
$
10,065.3

 
$
9,943.4

 
$
3,319.5

 
$
9,625.8

 
$
9,472.8

 
$
3,129.5



(1) 
These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.