GENERAL AND SIGNIFICANT ACCOUNTING POLICIES - RECOGNITION OF REVENUES AND EXPENSES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Total	$ 847.4	$ 773.4	$ 1,569.5	$ 1,478.2
Ocean Transportation
Ocean Transportation services	674.2	605.8	1,240.0	1,145.3
Terminal and other related services	11.0	6.6	19.7	13.5
Fuel sales	3.1	2.8	6.0	5.7
Vessel management and related services	1.6	1.7	3.2	3.4
Total	689.9	616.9	$ 1,268.9	$ 1,167.9
Percentage of ocean transportation revenues and fuel sales denominated in foreign currency			3.00%	3.00%
Logistics
Transportation Brokerage and Freight Forwarding services	139.2	139.5	$ 266.6	$ 277.2
Warehousing and distribution services	10.3	10.0	19.4	19.6
Supply Chain Management services	8.0	7.0	14.6	13.5
Total	$ 157.5	$ 156.5	$ 300.6	$ 310.3
Percentage of transportation brokerage and freight forwarding services revenue denominated in foreign currency			3.00%	3.00%