PROPERTY AND EQUIPMENT (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($)
Property and equipment
Property and Equipment	$ 3,752.7	$ 3,487.2
Less: Accumulated Depreciation	(1,491.8)	(1,397.3)
Total Property and Equipment, net	$ 2,260.9	2,089.9
Number of vessels under agreements for construction | item	3
Depreciation Expense	$ 135.4	124.4	$ 123.5
Vessels
Property and equipment
Property and Equipment	2,475.2	2,323.4
Less: Accumulated Depreciation	(961.9)	(886.8)
Total Property and Equipment, net	1,513.3	1,436.6
Containers and equipment
Property and equipment
Property and Equipment	883.8	845.0
Less: Accumulated Depreciation	(465.9)	(451.9)
Total Property and Equipment, net	417.9	393.1
Terminal equipment and other property
Property and equipment
Property and Equipment	152.3	148.0
Less: Accumulated Depreciation	(64.0)	(58.6)
Total Property and Equipment, net	88.3	89.4
New vessel construction in progress
Property and equipment
Property and Equipment	198.8	103.1
Total Property and Equipment, net	$ 198.8	$ 103.1
Number of vessels under agreements for construction | item	3	3
Other construction in progress
Property and equipment
Property and Equipment	$ 42.6	$ 67.7
Total Property and Equipment, net	$ 42.6	$ 67.7