COMMITMENTS AND CONTINGENCIES Range of Environmental Liability and Number of Active Sites (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($) site	Dec. 31, 2016 USD ($)
Site Contingency [Line Items]
Reduction to Environmental QSF Deferred Gain due to Settlement Agreement	$ 5.2
Reduction to Environmental QSF Asset due to Settlement Agreement	5.2
Recognition of Environmental QSF Deferred Gain due to Amendment	3.8
Environmental-related assets	$ 24.3	$ 33.4
Environmental Related Matters [Member]
Site Contingency [Line Items]
Number Of Active Environmental Investigation And Remediation Sites | site	35
Maximum [Member] | Environmental Related Matters [Member]
Site Contingency [Line Items]
Loss Contingency, Range of Possible Loss, Maximum	$ 119.6