EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Retirement Benefits [Abstract]
Expected employer contribution	$ 1.0
Components of net pension expense
Service cost	1.0	$ 1.0
Interest cost	2.2	2.0
Expected return on plan assets	(2.9)	(2.9)
Recognized net actuarial loss	0.8	0.7
Net pension expense	$ 1.1	$ 0.8