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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION
 6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION
PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION

The following tables summarize utility property, plant and equipment by asset category:
Eversource
As of June 30, 2017
 
As of December 31, 2016
(Millions of Dollars)
 
Distribution - Electric
$
14,012.6

 
$
13,716.9

Distribution - Natural Gas
3,094.3

 
3,010.4

Transmission - Electric
8,817.6

 
8,517.4

Generation
1,215.4

 
1,224.2

Electric and Natural Gas Utility
27,139.9

 
26,468.9

Other (1)
594.0

 
591.6

Property, Plant and Equipment, Gross
27,733.9

 
27,060.5

Less:  Accumulated Depreciation
 
 
 
Electric and Natural Gas Utility   
(6,706.6
)
 
(6,480.4
)
Other
(262.8
)
 
(242.0
)
Total Accumulated Depreciation
(6,969.4
)
 
(6,722.4
)
Property, Plant and Equipment, Net
20,764.5

 
20,338.1

Construction Work in Progress (2)
1,307.0

 
1,012.4

Total Property, Plant and Equipment, Net
$
22,071.5

 
$
21,350.5



(1) These assets are primarily comprised of building improvements, computer software, hardware and equipment at Eversource Service.
(2) As of June 30, 2017, the total CWIP related to NPT was approximately $190 million.
 
As of June 30, 2017
 
As of December 31, 2016
(Millions of Dollars)
CL&P
 
NSTAR
Electric
 
PSNH
 
WMECO
 
CL&P
 
NSTAR Electric
 
PSNH
 
WMECO
Distribution
$
5,717.1

 
$
5,453.3

 
$
2,018.6

 
$
863.6

 
$
5,562.9

 
$
5,402.3

 
$
1,949.8

 
$
841.9

Transmission
4,016.4

 
2,530.3

 
1,103.1

 
1,119.4

 
3,912.9

 
2,435.8

 
1,059.3

 
1,061.1

Generation
—

 
—

 
1,179.4

 
36.0

 
—

 
—

 
1,188.2

 
36.0

Property, Plant and Equipment, Gross
9,733.5

 
7,983.6

 
4,301.1

 
2,019.0

 
9,475.8

 
7,838.1

 
4,197.3

 
1,939.0

Less:  Accumulated Depreciation
(2,156.7
)
 
(2,104.2
)
 
(1,290.1
)
 
(352.0
)
 
(2,082.4
)
 
(2,025.4
)
 
(1,254.7
)
 
(338.8
)
Property, Plant and Equipment, Net
7,576.8

 
5,879.4

 
3,011.0

 
1,667.0

 
7,393.4

 
5,812.7

 
2,942.6

 
1,600.2

Construction Work in Progress
363.6

 
309.1

 
107.5

 
52.8

 
239.0

 
239.1

 
96.7

 
78.1

Total Property, Plant and Equipment, Net
$
7,940.4

 
$
6,188.5

 
$
3,118.5

 
$
1,719.8

 
$
7,632.4

 
$
6,051.8

 
$
3,039.3

 
$
1,678.3