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GOODWILL AND INTANGIBLE ASSETS - CHANGES IN GOODWILL (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Total Goodwill	$ 327.8	$ 327.8
Ocean Transportation
Goodwill [Line Items]
Total Goodwill	222.6
Logistics
Goodwill [Line Items]
Total Goodwill	105.2
Logistics \| Span Alaska
Goodwill [Line Items]
Total Goodwill	78.6
Logistics \| Other Acquisitions
Goodwill [Line Items]
Total Goodwill	$ 26.6

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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