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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Property and equipment    
Property and Equipment $ 2,911.4 $ 2,912.3
Less: Accumulated Depreciation (1,227.4) (1,222.4)
Property and equipment, net 1,684.0 1,689.9
Vessels    
Property and equipment    
Property and Equipment 2,200.1 2,191.6
Containers and equipment    
Property and equipment    
Property and Equipment 559.6 572.3
Terminal facilities and other property    
Property and equipment    
Property and Equipment 119.9 119.8
Construction in progress    
Property and equipment    
Property and Equipment $ 31.8 $ 28.6