COMMITMENTS AND CONTINGENCIES Range of Environmental Liability and Number of Active Sites (Details) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2015 USD ($)	Jun. 30, 2016 USD ($) site
Site Contingency [Line Items]
Environmental-Related Receivable from Other Third Parties		$ 2.0
Recorded Third-Party Environmental Recoveries Receivable	$ 12.8	34.2
Environmental Related Matters [Member]
Site Contingency [Line Items]
Settlement Agreement with Insurer, Total Amount Received	$ 34.2
Settlement Agreement with Insurer, Amount Received in Cash		2.0
Settlement Agreement with Insurer, Amount Deposited in Qualified Settlement Fund		32.2
Settlement Agreement with Insurer, Deferred Income		$ 23.0
Number Of Active Environmental Investigation And Remediation Sites | site		40
Loss Contingency, Range of Possible Loss, Maximum		$ 130.0