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Property, Plant, and Equipment | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment Disclosure | PROPERTY, PLANT AND EQUIPMENT The following table sets forth our property, plant and equipment by property type, for the periods indicated:
|  | December 31, |  | December 31,
|  | 2023 |  | 2022
|  | (Thousands of dollars)
Natural gas distribution pipelines and related equipment |  | $ | 6,716,074 |  |  | $ | 6,240,236 |
Natural gas transmission pipelines and related equipment |  | 713,505 |  |  | 661,379 |
General plant and other |  | 907,946 |  |  | 782,870 |
Construction work in process |  | 131,442 |  |  | 150,072 |
Property, plant and equipment |  | 8,468,967 |  |  | 7,834,557 |
Accumulated depreciation and amortization |  | (2,333,755) |  |  | (2,205,717) |
Net property, plant and equipment |  | $ | 6,135,212 |  |  | $ | 5,628,840 |
We compute depreciation expense by applying composite, straight-line rates of approximately 2.5 percent to 3.5 percent as approved by various regulatory authorities. We recorded capitalized interest of $5.7 million, $4.5 million and $4.2 million for the years ended December 31, 2023, 2022 and 2021, respectively. We incurred liabilities for construction work in process that had not been paid at December 31, 2023, 2022 and 2021 of $36.2 million, $28.6 million and $25.6 million, respectively. Such amounts are not included in capital expenditures or in the change of working capital items on our consolidated statements of cash flows.

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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://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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