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GOODWILL AND INTANGIBLE ASSETS - INTANGIBLE ASSETS (Details) - USD ($) $ in Millions | Feb. 27, 2023 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Intangible assets |  |  |
Total Intangible Assets, net |  | $ 172.5 | $ 176.4
Trade Names |  |  |
Intangible assets |  |  |
Indefinite-Lived intangible asset |  | 27.3 | 27.3
Customer Relationships |  |  |
Intangible assets |  |  |
Expected useful life | 7 years |  |
Finite-Lived intangible assets acquired | $ 16.5 |  |
Total |  | 250.3 | 251.0
Less: Accumulated Amortization |  | (105.1) | (101.9)
Total estimated amortization expense related to intangibles |  | 145.2 | 149.1
Ocean Transportation | Customer Relationships |  |  |
Intangible assets |  |  |
Total |  | 140.6 | 140.6
Logistics | Customer Relationships |  |  |
Intangible assets |  |  |
Total |  | $ 109.7 | $ 110.4

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