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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION | 9 Months Ended
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Sep. 30, 2021
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION | PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION The following tables summarize property, plant and equipment by asset category:
Eversource | As of September 30, 2021 |  | As of December 31, 2020
(Millions of Dollars) |
Distribution - Electric | $ | 17,257.3 |  |  | $ | 16,703.2 |
Distribution - Natural Gas | 6,334.9 |  |  | 6,111.2 |
Transmission - Electric | 12,396.2 |  |  | 11,954.0 |
Distribution - Water | 1,771.1 |  |  | 1,743.1 |
Solar | 200.4 |  |  | 201.5 |
Utility | 37,959.9 |  |  | 36,713.0 |
Other (1) | 1,430.5 |  |  | 1,269.0 |
Property, Plant and Equipment, Gross | 39,390.4 |  |  | 37,982.0 |
Less: Accumulated Depreciation |  |  |
Utility | (8,830.2) |  |  | (8,476.3) |
Other | (550.0) |  |  | (477.6) |
Total Accumulated Depreciation | (9,380.2) |  |  | (8,953.9) |
Property, Plant and Equipment, Net | 30,010.2 |  |  | 29,028.1 |
Construction Work in Progress | 2,456.9 |  |  | 1,854.4 |
Total Property, Plant and Equipment, Net | $ | 32,467.1 |  |  | $ | 30,882.5 |
| As of September 30, 2021 |  | As of December 31, 2020
(Millions of Dollars) | CL&P |  | NSTAR Electric |  | PSNH |  | CL&P |  | NSTAR Electric |  | PSNH
Distribution - Electric | $ | 7,028.9 |  |  | $ | 7,798.8 |  |  | $ | 2,469.9 |  |  | $ | 6,820.7 |  |  | $ | 7,544.4 |  |  | $ | 2,378.4 |
Transmission - Electric | 5,707.9 |  |  | 4,884.0 |  |  | 1,805.9 |  |  | 5,512.0 |  |  | 4,701.3 |  |  | 1,742.4 |
Solar | — |  |  | 200.4 |  |  | — |  |  | — |  |  | 201.5 |  |  | — |
Property, Plant and Equipment, Gross | 12,736.8 |  |  | 12,883.2 |  |  | 4,275.8 |  |  | 12,332.7 |  |  | 12,447.2 |  |  | 4,120.8 |
Less: Accumulated Depreciation | (2,574.6) |  |  | (3,220.7) |  |  | (895.4) |  |  | (2,475.4) |  |  | (3,074.1) |  |  | (848.9) |
Property, Plant and Equipment, Net | 10,162.2 |  |  | 9,662.5 |  |  | 3,380.4 |  |  | 9,857.3 |  |  | 9,373.1 |  |  | 3,271.9 |
Construction Work in Progress | 436.6 |  |  | 949.2 |  |  | 148.7 |  |  | 377.3 |  |  | 750.0 |  |  | 102.4 |
Total Property, Plant and Equipment, Net | $ | 10,598.8 |  |  | $ | 10,611.7 |  |  | $ | 3,529.1 |  |  | $ | 10,234.6 |  |  | $ | 10,123.1 |  |  | $ | 3,374.3 |
(1) These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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