EMPLOYEE BENEFIT PLANS Employee Benefit Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Postretirement Benefit Expense	$ 4.9	$ 3.9	$ 3.7
Deferred Compensation Liability, Current and Noncurrent	1.3	1.5
Deferred Compensation Liability, Current	0.3	0.3
Supplemental Health Care Benefits Liability, Noncurrent	0.8	0.7
Nonqualified deferred compensation for nonemployee directors	$ 0.6	$ 0.3