GENERAL AND SIGNIFICANT ACCOUNTING POLICIES - RECOGNITION OF REVENUES AND EXPENSES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Recognition of Revenues and Expenses
Total	$ 880.1	$ 962.0	$ 2,492.6	$ 2,531.5
Ocean Transportation
Recognition of Revenues and Expenses
Ocean Transportation services	713.4	787.9	2,017.3	2,027.9
Terminal and other related services	1.9	7.4	6.3	27.1
Fuel sales	3.0	3.3	7.7	9.3
Vessel management and related services		0.1		3.3
Total	$ 718.3	$ 798.7	$ 2,031.3	$ 2,067.6
Percentage of ocean transportation revenues and fuel sales denominated in foreign currency	3.00%	3.00%	3.00%	3.00%
Logistics
Recognition of Revenues and Expenses
Transportation Brokerage and Freight Forwarding services	$ 142.3	$ 143.1	$ 406.8	$ 409.7
Warehousing services	10.7	10.6	29.7	30.0
Supply Chain Management services	8.8	9.6	24.8	24.2
Total	$ 161.8	$ 163.3	$ 461.3	$ 463.9
Percentage of transportation brokerage and freight forwarding services revenue denominated in foreign currency	3.00%	3.00%	3.00%	3.00%