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v3.20.1

Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2019
19. Property, Plant and Equipment |
Regulated and Non-Regulated Assets |
Property, plant and equipment consisted of the following regulated and non-regulated assets:
As at |  | December 31 | December 31
millions of Canadian dollars | Estimated useful life |  | 2019 (1) |  | 2018
Generation (2) | 3 to 131 | $ | 11,181 | $ | 11,092
Transmission | 11 to 80 |  | 2,318 |  | 3,047
Distribution | 4 to 80 |  | 5,820 |  | 6,348
Gas transmission and distribution | 7 to 85 |  | 3,546 |  | 3,398
General plant and other | 2 to 60 |  | 2,006 |  | 2,158
Total cost |  |  | 24,871 |  | 26,043
Less: Accumulated depreciation (2) |  |  | (8,295) |  | (8,567)
|  |  | 16,576 |  | 17,476
Construction work in progress |  |  | 1,591 |  | 1,236
Net book value |  | $ | 18,167 | $ | 18,712
(1) Excludes Emera Maine balances classified as held for sale as at December 31, 2019. Refer to the note 4 for further details.
(2) On March 29, 2019, the Company sold its NEGG facilities. As of December 31, 2018, the Company classified these assets as held for sale on the Consolidated Balance Sheets. Refer to note 4 for additional information.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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