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Properties (Tables) | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Schedule of Net Properties | Details of the Company’s net properties are as follows:
(Dollars in Millions) |  |  |  | Accumulated |  | Net Book |  | Annual Depreciation |  | Estimated Useful Life |  | Depreciation
December 2021 |  | Cost |  | Depreciation |  | Value |  | Rate |  | ( Avg. Years) |  | Method
Road |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Rail and Other Track Material |  | $ | 8,761 |  |  | $ | (1,835) |  |  | $ | 6,926 |  |  | 2.5% |  | 41 |  | Group Life
|  | Ties |  | 6,522 |  |  | (1,923) |  |  | 4,599 |  |  | 3.5% |  | 28 |  | Group Life
|  | Grading |  | 2,751 |  |  | (624) |  |  | 2,127 |  |  | 1.3% |  | 75 |  | Group Life
|  | Ballast |  | 3,289 |  |  | (1,094) |  |  | 2,195 |  |  | 2.6% |  | 38 |  | Group Life
|  | Bridges, Trestles, and Culverts |  | 2,794 |  |  | (411) |  |  | 2,383 |  |  | 1.7% |  | 60 |  | Group Life
|  | Signals and Interlockers |  | 3,266 |  |  | (1,086) |  |  | 2,180 |  |  | 4.1% |  | 24 |  | Group Life
|  | Buildings |  | 1,388 |  |  | (514) |  |  | 874 |  |  | 2.5% |  | 40 |  | Group Life/ Straight Line (a)
|  | Other |  | 5,305 |  |  | (2,207) |  |  | 3,098 |  |  | 4.1% |  | 25 |  | Group Life/ Straight Line (a)
Total Road |  | 34,076 |  |  | (9,694) |  |  | 24,382 |  |  |  |  |  |  |
Equipment |  |  |  |  |  |  |  |  |  |  |  |
|  | Locomotive |  | 4,912 |  |  | (1,732) |  |  | 3,180 |  |  | 3.6% |  | 27 |  | Group Life
|  | Freight Cars |  | 2,322 |  |  | (358) |  |  | 1,964 |  |  | 2.9% |  | 35 |  | Group Life
|  | Work Equipment and Other |  | 2,891 |  |  | (1,706) |  |  | 1,185 |  |  | 8.2% |  | 12 |  | Group Life/ Straight Line (a)
Total Equipment |  | 10,125 |  |  | (3,796) |  |  | 6,329 |  |  |  |  |  |  |
Land |  |  |  | 1,885 |  |  | — |  |  | 1,885 |  |  | N/A |  | N/A |  | N/A
Construction In Progress |  | 419 |  |  | — |  |  | 419 |  |  | N/A |  | N/A |  | N/A
Total Properties |  | $ | 46,505 |  |  | $ | (13,490) |  |  | $ | 33,015 |  |  |  |  |  |  |
(a) For depreciation method, certain asset categories contain intermodal terminals, trucking or technology-related assets, which are depreciated using the straight-line method. NOTE 6. Properties, continued
(Dollars in Millions) |  |  |  | Accumulated |  | Net Book |  | Annual Depreciation |  | Estimated Useful Life |  | Depreciation
December 2020 |  | Cost |  | Depreciation |  | Value |  | Rate |  | (Avg. Years) |  | Method
Road |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Rail and Other Track Material |  | $ | 8,449 |  |  | $ | (1,739) |  |  | $ | 6,710 |  |  | 2.5% |  | 41 |  | Group Life
|  | Ties |  | 6,284 |  |  | (1,780) |  |  | 4,504 |  |  | 3.5% |  | 28 |  | Group Life
|  | Grading |  | 2,768 |  |  | (614) |  |  | 2,154 |  |  | 1.3% |  | 75 |  | Group Life
|  | Ballast |  | 3,238 |  |  | (1,051) |  |  | 2,187 |  |  | 2.6% |  | 38 |  | Group Life
|  | Bridges, Trestles, and Culverts |  | 2,688 |  |  | (380) |  |  | 2,308 |  |  | 1.7% |  | 60 |  | Group Life
|  | Signals and Interlockers |  | 3,170 |  |  | (944) |  |  | 2,226 |  |  | 4.1% |  | 24 |  | Group Life
|  | Buildings |  | 1,366 |  |  | (529) |  |  | 837 |  |  | 2.5% |  | 40 |  | Group Life/ Straight Line (a)
|  | Other |  | 5,146 |  |  | (2,101) |  |  | 3,045 |  |  | 4.1% |  | 25 |  | Group Life/ Straight Line (a)
Total Road |  | 33,109 |  |  | (9,138) |  |  | 23,971 |  |  |  |  |  |  |
Equipment |  |  |  |  |  |  |  |  |  |  |  |
|  | Locomotive |  | 5,085 |  |  | (1,849) |  |  | 3,236 |  |  | 3.6% |  | 27 |  | Group Life
|  | Freight Cars |  | 2,557 |  |  | (540) |  |  | 2,017 |  |  | 2.9% |  | 35 |  | Group Life
|  | Work Equipment and Other |  | 2,585 |  |  | (1,559) |  |  | 1,026 |  |  | 8.2% |  | 12 |  | Group Life/ Straight Line (a)
Total Equipment |  | 10,227 |  |  | (3,948) |  |  | 6,279 |  |  |  |  |  |  |
Land |  |  |  | 1,823 |  |  | — |  |  | 1,823 |  |  | N/A |  | N/A |  | N/A
Construction In Progress |  | 371 |  |  | — |  |  | 371 |  |  | N/A |  | N/A |  | N/A
Total Properties |  | $ | 45,530 |  |  | $ | (13,086) |  |  | $ | 32,444 |  |  |  |  |  |  |
(a) For depreciation method, certain asset categories contain intermodal terminals or technology-related assets, which are depreciated using the straight-line method.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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