GENERAL AND SIGNIFICANT ACCOUNTING POLICIES - RECOGNITION OF REVENUES AND EXPENSES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Total	$ 962.0	$ 827.5	$ 2,531.5	$ 2,305.7
Ocean Transportation
Ocean Transportation services	787.9	654.3	2,027.9	1,799.6
Terminal and other related services	7.4	10.8	27.1	24.3
Fuel sales	3.3	2.7	9.3	8.4
Vessel management and related services	0.1	1.6	3.3	5.0
Total	$ 798.7	$ 669.4	$ 2,067.6	$ 1,837.3
Percentage of ocean transportation revenues and fuel sales denominated in foreign currency	3.00%	3.00%	3.00%	3.00%
Logistics
Transportation Brokerage and Freight Forwarding services	$ 143.1	$ 138.6	$ 409.7	$ 415.8
Warehousing and distribution services	10.6	11.9	30.0	31.5
Supply Chain Management services	9.6	7.6	24.2	21.1
Total	$ 163.3	$ 158.1	$ 463.9	$ 468.4
Percentage of transportation brokerage and freight forwarding services revenue denominated in foreign currency	3.00%	3.00%	3.00%	3.00%