EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Expected employer contribution	$ 1.0		$ 1.0
Components of net pension expense
Service cost	1.0	$ 1.0	2.0	$ 2.0
Interest cost	2.1	2.1	4.3	4.1
Expected return on plan assets	(2.8)	(2.9)	(5.7)	(5.8)
Recognized net actuarial loss	0.8	0.7	1.6	1.4
Net pension expense	$ 1.1	$ 0.9	$ 2.2	$ 1.7