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Property, plant and equipment | 12 Months Ended
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Dec. 31, 2019
Property, Plant and Equipment [Abstract] |
Property, plant and equipment | Property, plant and equipment Property, plant and equipment consist of the following:
2019 |  |  |  |  |
| Cost |  | Accumulated depreciation |  | Net book value
Generation | $ | 2,816,611 |  |  | $ | 540,118 |  |  | $ | 2,276,493 |
Distribution and transmission | 4,988,297 |  |  | 598,449 |  |  | 4,389,848 |
Land | 74,517 |  |  | — |  |  | 74,517 |
Equipment and other | 94,583 |  |  | 47,541 |  |  | 47,042 |
Construction in progress |  |  |  |  |
Generation | 140,235 |  |  | — |  |  | 140,235 |
Distribution and transmission | 303,529 |  |  | — |  |  | 303,529 |
| $ | 8,417,772 |  |  | $ | 1,186,108 |  |  | $ | 7,231,664 |
5. | Property, plant and equipment (continued)
2018 |  |  |  |  |
| Cost |  | Accumulated depreciation |  | Net book value
Generation | $ | 2,470,279 |  |  | $ | 450,230 |  |  | $ | 2,020,049 |
Distribution and transmission | 4,455,935 |  |  | 521,236 |  |  | 3,934,699 |
Land | 73,773 |  |  | — |  |  | 73,773 |
Equipment and other | 88,757 |  |  | 41,295 |  |  | 47,462 |
Construction in progress |  |  |  |  |
Generation | 104,996 |  |  | — |  |  | 104,996 |
Distribution and transmission | 212,579 |  |  | — |  |  | 212,579 |
| $ | 7,406,319 |  |  | $ | 1,012,761 |  |  | $ | 6,393,558 |
Generation assets include cost of $109,653 (2018 - $104,107) and accumulated depreciation of $39,638 (2018 - $34,916) related to facilities under financing lease or owned by consolidated VIEs. Depreciation expense of facilities under finance leases was $1,615 (2018 - $1,987). Distribution and transmission assets include the following:
• | Cost of $1,450,946 (2018 - $1,383,960) and accumulated depreciation of $97,080 (2018 - $69,960) related to regulated generation and transmission assets.
• | Cost of $514,709 (2018 - $503,664) and accumulated depreciation of $31,349 (2018 - $21,697) related to commonly owned facilities (note 1(k)). Total expenditures incurred on these facilities for the year ended December 31, 2019 were $69,210 (2018 - $75,427).
• | Cost of $3,076 (2018 - $3,076) and accumulated depreciation of $1,003 (2018 - $669) related to assets under finance lease.
• | Expansion costs of $1,000 on which the Company does not currently earn a return.
For the year ended December 31, 2019, contributions received in aid of construction of $7,137 (2018 - $6,057) have been credited to the cost of the assets. Interest and AFUDC capitalized to the cost of the assets in 2019 and 2018 are as follows:
|  | 2019 |  | 2018
Interest capitalized on non-regulated property |  | $ | 4,538 |  |  | $ | 2,268 |
AFUDC capitalized on regulated property: |  |  |  |
Allowance for borrowed funds |  | 2,745 |  |  | 1,684 |
Allowance for equity funds |  | 4,896 |  |  | 2,728 |
Total |  | $ | 12,179 |  |  | $ | 6,680 |

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- References No definition available. + Details
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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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