GENERAL AND SIGNIFICANT ACCOUNTING POLICIES - RECOGNITION OF REVENUES AND EXPENSES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Total	$ 827.5	$ 1,114.8	$ 2,305.7	$ 3,541.4
Ocean. Transportation.
Ocean Transportation services	654.3	908.4	1,799.6	2,885.3
Terminal and other related services	10.8	5.4	24.3	13.8
Fuel sales	2.7	3.2	8.4	7.9
Vessel management and related services	1.6	1.5	5.0	4.6
Total	669.4	918.5	$ 1,837.3	$ 2,911.6
Percentage of ocean transportation revenues and fuel sales denominated in foreign currency			3.00%	3.00%
Logistics.
Transportation Brokerage and Freight Forwarding services	138.6	169.2	$ 415.8	$ 548.5
Warehousing and distribution services	11.9	15.5	31.5	41.4
Supply chain management and other services	7.6	11.6	21.1	39.9
Total	$ 158.1	$ 196.3	$ 468.4	$ 629.8
Percentage of transportation brokerage and freight forwarding services revenue denominated in foreign currency			3.00%	3.00%