ENVIRONMENTAL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Environmental Remediation Obligations [Abstract]
Reserves for future environmental expenditures - total	$ 139.2	$ 136.0	$ 138.1
Reserves for environmental expenditures - noncurrent	120.2	117.0	$ 119.1
Environmental Remediation Expense	$ 2.7	$ 0.7