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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Note 8—Property, Plant and Equipment Net property, plant and equipment is composed of the following:
| Depreciable Lives |  | As of December 31,
|  | 2024 |  | 2023
|  |  | (Dollars in millions)
Property, plant and equipment: |  |  |  |  |
Land | N/A |  | $ | 329 |  |  | 334 |
Fiber, conduit and other outside plant(1) | 15-45 years |  | 8,246 |  |  | 7,126 |
Central office and other network electronics(2) | 7-10 years |  | 5,792 |  |  | 5,488 |
Support assets(3) | 3-30 years |  | 2,878 |  |  | 2,845 |
Construction in progress(4) | N/A |  | 530 |  |  | 1,146 |
Gross property, plant and equipment |  |  | 17,775 |  |  | 16,939 |
Accumulated depreciation |  |  | (8,910) |  |  | (8,239) |
Net property, plant and equipment |  |  | $ | 8,865 |  |  | 8,700 |
_______________________________________________________________________________ (1)Fiber, conduit and other outside plant consists of fiber and metallic cable, conduit, poles and other supporting structures. (2)Central office and other network electronics consists of circuit and packet switches, routers, transmission electronics and electronics providing service to customers. (3)Support assets consist of buildings, computers and other administrative and support equipment. (4)Construction in progress includes inventory held for construction and property of the aforementioned categories that has not been placed in service as it is still under construction. We recorded depreciation expense of $712 million, $756 million and $781 million for the years ended December 31, 2024, 2023 and 2022, respectively.

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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/1943274/2147477798/958-360-50-6 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/1943274/2147477798/958-360-50-1 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/1943274/2147477798/958-360-50-7 + Details
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