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Schedule III - Schedule of Real Estate and Depreciation (Notes) | 12 Months Ended
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Dec. 31, 2024
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items] |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Text Block] |
Description | Encumbrances |  | Initial Cost to Company | Cost Capitalized Subsequent to Acquisition | Gross Amount Carried at Close of Current Period | Accumulated Depreciation at Close of Current Period | Date of Construction | Date Acquired | Life on Which Depreciation in Latest Income Statement is Computed
Communications infrastructure(a) | $ | 1,782 |  | (b) | (c) | (c) | $ | 30,474 |  | $ | (15,049) |  | Various | Various | Up to 20 years
(a)Includes (1) more than 40,000 towers, (2) approximately 105,000 small cell nodes either currently generating revenue or under contract and (3) approximately 90,000 route miles of fiber. No single asset exceeds 5% of the aggregate gross amounts at which the assets were carried at the close of the period set forth in the table above. (b)Encumbrances are reported at face value, without contemplating the effect of deferred financing costs, discounts or premiums. Certain of the Company's debt is secured by (1) a security interest in substantially all of the applicable issuers' assignable personal property, (2) a pledge of the equity interests in each applicable issuer and (3) a security interest in the applicable issuers' leases with tenants to lease tower space (space licenses). (c)The Company has omitted this information, as it would be impracticable to compile such information on an asset-by-asset basis.
| 2024 |  | 2023 |  | 2022
Gross amount at beginning | $ | 29,383 |  |  | $ | 27,936 |  |  | $ | 26,679 |
Additions during period: |  |  |  |  |
Acquisitions through foreclosure | — |  |  | — |  |  | — |
Other acquisitions(a) | 10 |  |  | 50 |  |  | 32 |
Communications infrastructure construction and improvements | 1,063 |  |  | 1,254 |  |  | 1,138 |
Purchase of land interests | 58 |  |  | 64 |  |  | 53 |
Sustaining capital expenditures | 59 |  |  | 52 |  |  | 52 |
Other(b) | 78 |  |  | 105 |  |  | 127 |
Total additions | 1,268 |  |  | 1,525 |  |  | 1,402 |
Deductions during period: |  |  |  |  |
Cost of real estate sold or disposed | (177) |  |  | (78) |  |  | (145) |
Other | — |  |  | — |  |  | — |
Total deductions | (177) |  |  | (78) |  |  | (145) |
Balance at end | $ | 30,474 |  |  | $ | 29,383 |  |  | $ | 27,936 |
(a)Includes acquisitions of communications infrastructure. (b)Predominately relates to (1) the purchase of property and equipment under finance leases and installment land purchases, (2) asset retirement obligations and (3) capitalized stock-based compensation.
| 2024 |  | 2023 |  | 2022
Gross amount of accumulated depreciation at beginning | $ | (13,817) |  |  | $ | (12,649) |  |  | $ | (11,582) |
Additions during period: |  |  |  |  |
Depreciation | (1,257) |  |  | (1,222) |  |  | (1,181) |
Total additions | (1,257) |  |  | (1,222) |  |  | (1,181) |
Deductions during period: |  |  |  |  |
Amount for assets sold or disposed | 22 |  |  | 38 |  |  | 105 |
Other | 3 |  |  | 16 |  |  | 9 |
Total deductions | 25 |  |  | 54 |  |  | 114 |
Balance at end | $ | (15,049) |  |  | $ | (13,817) |  |  | $ | (12,649) |

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