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Property, Plant And Equipment | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | NOTE 9. PROPERTY, PLANT AND EQUIPMENT Net Utility Property Net utility property consisted of the following as of December 31 (dollars in thousands):
|  | 2021 |  |  | 2020 |
Utility plant in service |  | $ | 7,166,580 |  |  | $ | 6,809,797 |
Construction work in progress |  |  | 205,405 |  |  |  | 175,767 |
Total |  |  | 7,371,985 |  |  |  | 6,985,564 |
Less: Accumulated depreciation and amortization |  |  | 2,146,470 |  |  |  | 1,993,952 |
Total net utility property |  | $ | 5,225,515 |  |  | $ | 4,991,612 |
Gross Property, Plant and Equipment The gross balances of the major classifications of property, plant and equipment are detailed in the following table as of December 31 (dollars in thousands):
|  | 2021 |  |  | 2020 |
Avista Utilities: |  |  |  |  |  |
Electric production |  | $ | 1,494,371 |  |  | $ | 1,457,497 |
Electric transmission |  |  | 945,624 |  |  |  | 862,987 |
Electric distribution |  |  | 2,093,937 |  |  |  | 1,978,868 |
Electric construction work-in-progress (CWIP) and other |  |  | 424,733 |  |  |  | 384,372 |
Electric total |  |  | 4,958,665 |  |  |  | 4,683,724 |
Natural gas underground storage |  |  | 55,684 |  |  |  | 53,351 |
Natural gas distribution |  |  | 1,356,477 |  |  |  | 1,282,563 |
Natural gas CWIP and other |  |  | 87,852 |  |  |  | 83,644 |
Natural gas total |  |  | 1,500,013 |  |  |  | 1,419,558 |
Common plant (including CWIP) |  |  | 740,339 |  |  |  | 712,609 |
Total Avista Utilities |  |  | 7,199,017 |  |  |  | 6,815,891 |
AEL&P: |  |  |  |  |  |
Electric production |  |  | 106,094 |  |  |  | 105,076 |
Electric transmission |  |  | 22,691 |  |  |  | 22,419 |
Electric distribution |  |  | 27,138 |  |  |  | 25,814 |
Electric CWIP and other |  |  | 7,319 |  |  |  | 6,677 |
Electric total |  |  | 163,242 |  |  |  | 159,986 |
Common plant |  |  | 9,726 |  |  |  | 9,687 |
Total AEL&P |  |  | 172,968 |  |  |  | 169,673 |
Total gross utility property |  |  | 7,371,985 |  |  |  | 6,985,564 |
Other (1) |  |  | 17,818 |  |  |  | 16,394 |
Total |  | $ | 7,389,803 |  |  | $ | 7,001,958 |
(1) Included in other property and investments-net and other non-current assets on the Consolidated Balance Sheets. Accumulated depreciation was $2.3 million as of December 31, 2021 and $2.2 million as of December 31, 2020 for the other businesses.

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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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