PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,013.7	$ 3,672.7
Less - Accumulated depreciation	(845.1)	(701.5)
Property, plant and equipment, net	3,168.6	2,971.2
Depreciation	140.7	133.1	$ 123.3
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	29.9	43.1	$ (1.5)
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	244.6	249.0
Process units, pipelines and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,282.2	2,934.5
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	48.0	47.9
Computers furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	134.9	121.2
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	304.0	320.1
Capitalized interest	17.6	9.3
Torrance Refinery [Member]
Property, Plant and Equipment [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 33.1	$ (43.8)