SIGNIFICANT ACCOUNTING POLICIES - INTANGIBLE ASSETS NET (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Finite-lived Intangible Assets
Total	$ 230.7	$ 230.7
Net Amount	230.9	236.6
Trade Names
Finite-lived Intangible Assets
Indefinite-Lived intangible asset	27.3	27.3
Customer Relationships.
Finite-lived Intangible Assets
Less: Accumulated Amortization	(27.1)	(21.4)
Net Amount	203.6	209.3
Estimated amortization expenses related to intangibles
Net Amount	203.6	209.3
Ocean Transportation | Customer Relationships.
Finite-lived Intangible Assets
Total	140.6	140.6
Logistics | Customer Relationships.
Finite-lived Intangible Assets
Total	$ 90.1	$ 90.1