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PROPERTY AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2023
PROPERTY AND EQUIPMENT |
Schedule of property and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2023 |  | ​ | As of December 31, 2022 |
​ |  | ​ | ​ |  | Accumulated |  | ​ |  |  | ​ | ​ |  | Accumulated |  | ​ |
(In millions) | ​ | Cost | ​ | Depreciation | ​ | Net Book Value |  | ​ | Cost | ​ | Depreciation | ​ | Net Book Value |
Vessels | ​ | $ | 2,323.4 | ​ | $ | 886.8 | ​ | $ | 1,436.6 | ​ | ​ | $ | 2,278.6 | ​ | $ | 838.8 | ​ | $ | 1,439.8 | ​
Containers and equipment | ​ |  | 845.0 | ​ | ​ | 451.9 | ​ |  | 393.1 | ​ | ​ |  | 762.7 | ​ |  | 433.8 | ​ |  | 328.9 | ​
Terminal facilities and other property | ​ |  | 148.0 | ​ | ​ | 58.6 | ​ |  | 89.4 | ​ | ​ |  | 131.5 | ​ |  | 53.6 | ​ |  | 77.9 | ​
New vessel construction in progress | ​ | ​ | 103.1 | ​ | ​ | — | ​ | ​ | 103.1 | ​ | ​ | ​ | 50.2 | ​ | ​ | — | ​ | ​ | 50.2 | ​
Other construction in progress | ​ |  | 67.7 | ​ | ​ | — | ​ |  | 67.7 | ​ | ​ |  | 65.7 | ​ |  | — | ​ |  | 65.7 | ​
Total | ​ | $ | 3,487.2 | ​ | $ | 1,397.3 | ​ | $ | 2,089.9 | ​ | ​ | $ | 3,288.7 | ​ | $ | 1,326.2 | ​ | $ | 1,962.5 | ​
Schedule of depreciation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31, |
(In millions) |  | 2023 |  | 2022 |  | 2021 |
Depreciation expense | ​ | $ | 124.4 | ​ | $ | 123.5 | ​ | $ | 117.1 | ​
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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 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
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